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1.
Graefes Arch Clin Exp Ophthalmol ; 259(10): 3137-3148, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-33961109

RESUMEN

PURPOSE: Premature birth, race, and sex are contributing risk factors for retinopathy of prematurity (ROP) and have long-term impact on children's retinal structure. Few studies investigate impact of race and sex on macular structure in children born preterm. This study compared foveal structure in preterm and full-term children. METHODS: Children aged 4-18 years were enrolled into three groups: (1) ROP-risk group (n = 81), born at < 32 weeks gestational age with and without history of ROP; (2) preterm group (n = 46), born at 32-36 weeks gestational age; and (3) control group (n = 68) with full-term birth. Using spectral-domain optical coherence tomography volume-scan images, foveal structure within 1-mm and 3-mm early treatment diabetic retinopathy study circular grid was measured and segmented. Total inner and outer retina thickness of the right eye was compared among the three groups. RESULTS: The mean total foveal thickness (in microns) was 287 ± 26 for the ROP-risk group, 276 ± 19 for the preterm group, and 263 ± 20 for the control group (F = 26, p < 0.001). Foveal thickness of the ROP-risk group was significantly higher than that of the preterm group and the control group (all p < 0.05). Foveal thickness was thinner in black children than in white children and thinner in females than in males (all p < 0.001). A similar disparity in race and sex was found in the thickness of the inner and outer layers. CONCLUSIONS: The fovea was significantly thicker in the ROP-risk group than the control group. Foveal thickness decreases with increased gestational age. Race and sex are significant factors in foveal structure in children.


Asunto(s)
Recien Nacido Prematuro , Retinopatía de la Prematuridad , Niño , Femenino , Fóvea Central , Edad Gestacional , Humanos , Recién Nacido , Masculino , Embarazo , Retinopatía de la Prematuridad/diagnóstico , Tomografía de Coherencia Óptica , Agudeza Visual
2.
Curr Opin Ophthalmol ; 30(5): 337-346, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31261187

RESUMEN

PURPOSE OF REVIEW: Despite the impressive results of recent artificial intelligence applications to general ophthalmology, comparatively less progress has been made toward solving problems in pediatric ophthalmology using similar techniques. This article discusses the unique needs of pediatric patients and how artificial intelligence techniques can address these challenges, surveys recent applications to pediatric ophthalmology, and discusses future directions. RECENT FINDINGS: The most significant advances involve the automated detection of retinopathy of prematurity, yielding results that rival experts. Machine learning has also been applied to the classification of pediatric cataracts, prediction of postoperative complications following cataract surgery, detection of strabismus and refractive error, prediction of future high myopia, and diagnosis of reading disability. In addition, machine learning techniques have been used for the study of visual development, vessel segmentation in pediatric fundus images, and ophthalmic image synthesis. SUMMARY: Artificial intelligence applications could significantly benefit clinical care by optimizing disease detection and grading, broadening access to care, furthering scientific discovery, and improving clinical efficiency. These methods need to match or surpass physician performance in clinical trials before deployment with patients. Owing to the widespread use of closed-access data sets and software implementations, it is difficult to directly compare the performance of these approaches, and reproducibility is poor. Open-access data sets and software could alleviate these issues and encourage further applications to pediatric ophthalmology.


Asunto(s)
Inteligencia Artificial/tendencias , Oftalmología/tendencias , Pediatría/tendencias , Niño , Atención a la Salud/tendencias , Oftalmopatías/diagnóstico , Oftalmopatías/terapia , Humanos
3.
Neuroophthalmology ; 40(1): 23-27, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-27928378

RESUMEN

The purpose of this study was to report the incidence and describe the characteristics of sixth cranial nerve (CN VI) palsy in paediatric patients with intracranial hypertension (IH). A retrospective chart review of central Ohio children diagnosed with IH over the 3-year period from 2010 to 2013 was conducted. IH without identifiable cause was defined as idiopathic intracranial hypertension (IIH), whereas IH with identifiable pathologic aetiology was deemed secondary intracranial hypertension (SIH). A subset of patients with CN VI palsy was identified. Data collected included patient age, gender, past medical history, aetiology of SIH, ophthalmic examination, lumbar puncture results, neuroimaging results, and response to treatment. Seventy-eight children with intracranial hypertension were included in the study. Nine (11.5%) children (four males, five females; median age 14, range: 3-18) were found to have a unilateral (n = 2) or bilateral (n = 7) CN VI palsy. Five children had IIH; the remaining four had SIH from cerebral venous sinus thrombosis (n = 2) and infection (n = 2). The mean lumbar puncture opening pressure for the nine patients with CN VI palsy was 40 cm H2O (range: 21-65 cm H2O). Papilloedema was present in 8/9 (89%) patients. One patient required a lumboperitoneal shunt, and two others required optic nerve sheath fenestrations in addition to medical management. All cases of CN VI palsy resolved with treatment. In our primary service area, the incidence of CN VI palsy is approximately 12% among paediatric IH patients. The majority of cases with CN VI palsy presented with papilloedema and all cases resolved with treatment of intracranial hypertension.

4.
Lancet Oncol ; 12(3): 245-55, 2011 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-21310658

RESUMEN

BACKGROUND: Optimum management of clinically localised prostate cancer presents unique challenges because of the highly variable and often indolent natural history of the disease. To predict disease aggressiveness, clinicians combine clinical variables to create prognostic models, but the models have limited accuracy. We assessed the prognostic value of a predefined cell cycle progression (CCP) score in two cohorts of patients with prostate cancer. METHODS: We measured the expression of 31 genes involved in CCP with quantitative RT-PCR on RNA extracted from formalin-fixed paraffin-embedded tumour samples, and created a predefined score and assessed its usefulness in the prediction of disease outcome. The signature was assessed retrospectively in a cohort of patients from the USA who had undergone radical prostatectomy, and in a cohort of randomly selected men with clinically localised prostate cancer diagnosed by use of a transurethral resection of the prostate (TURP) in the UK who were managed conservatively. The primary endpoint was time to biochemical recurrence for the cohort of patients who had radical prostatectomy, and time to death from prostate cancer for the TURP cohort. FINDINGS: After prostatectomy, the CCP score was useful for predicting biochemical recurrence in the univariate analysis (hazard ratio for a 1-unit change [doubling] in CCP 1·89; 95% CI 1·54-2·31; p=5·6×10(-9)) and the best multivariate analysis (1·77, 1·40-2·22; p=4·3×10(-6)). In the best predictive model (final multivariate analysis), the CCP score and prostate-specific antigen (PSA) concentration were the most important variables and were more significant than any other clinical variable. In the TURP cohort, the CCP score was the most important variable for prediction of time to death from prostate cancer in both univariate analysis (2·92, 2·38-3·57, p=6·1×10(-22)) and the final multivariate analysis (2·57, 1·93-3·43; p=8·2×10(-11)), and was stronger than all other prognostic factors, although PSA concentration also added useful information. Heterogeneity in the hazard ratio for the CCP score was not noted in any case for any clinical variables. INTERPRETATION: The results of this study provide strong evidence that the CCP score is a robust prognostic marker, which, after additional validation, could have an essential role in determining the appropriate treatment for patients with prostate cancer. FUNDING: Cancer Research UK, Queen Mary University of London, Orchid Appeal, US National Institutes of Health, and Koch Foundation.


Asunto(s)
Genes cdc , Neoplasias de la Próstata/genética , ARN/genética , Anciano , Perfilación de la Expresión Génica , Humanos , Masculino , Persona de Mediana Edad , Pronóstico , Prostatectomía , Neoplasias de la Próstata/cirugía , Estudios Retrospectivos
5.
J AAPOS ; 26(2): 84-86, 2022 04.
Artículo en Inglés | MEDLINE | ID: mdl-35091083

RESUMEN

Significant intracranial and retinal hemorrhages are often seen in infants with abusive head trauma, although accidental injury and previously undiagnosed medical disorders are important considerations in the differential diagnosis. We present the case of an infant with confirmed accidental trauma sustained from an adult-worn baby carrier fall with superimposed head crush injury, which resulted in significant cranial, intracranial, and retinal findings.


Asunto(s)
Maltrato a los Niños , Traumatismos Craneocerebrales , Síndrome del Bebé Sacudido , Niño , Maltrato a los Niños/diagnóstico , Traumatismos Craneocerebrales/complicaciones , Traumatismos Craneocerebrales/diagnóstico , Diagnóstico Diferencial , Humanos , Lactante , Retina , Hemorragia Retiniana/diagnóstico , Hemorragia Retiniana/etiología , Síndrome del Bebé Sacudido/complicaciones , Síndrome del Bebé Sacudido/diagnóstico
6.
West J Emerg Med ; 23(3): 424-431, 2022 Mar 24.
Artículo en Inglés | MEDLINE | ID: mdl-35679502

RESUMEN

INTRODUCTION: The use of the emergency department (ED) has been increasing, and many visits occur for non-urgent conditions. A similar trend was found among adult visits to the ED for ocular conditions. In this study we analyzed the impact of sociodemographic factors, presentation timing, and the COVID-19 pandemic on pediatric ED (PED) encounters for ophthalmologic conditions. It is important to identify the multifold factors associated with overutilization of the ED for non-urgent conditions. Caring for these patients in an outpatient clinical setting is safe and effective and could decrease ED crowding; it would also prevent delays in the care of other patients with more urgent medical problems and lower healthcare costs. METHODS: We retrospectively reviewed electronic health records of PED ocular-related encounters at two children's hospitals before (January 2014-May 2018) and during the COVID-19 pandemic (March 2020-February 2021). Encounters were categorized based on the International Classification of Diseases codes into "emergent," "urgent," and non-urgent" groups. We analyzed associations between sociodemographic factors and degrees of visit urgency. We also compared visit frequencies, degrees of urgency, and diagnoses between pre-pandemic and pandemic data. RESULTS: Pre-pandemic ocular-related PED encounters averaged 1,738 per year. There were highly significant sociodemographic associations with degrees of urgency in PED utilization. During the 12-month pandemic timeframe, encounter frequency contracted to 183. Emergent visits decreased from 21% to 11%, while the proportions of urgent and non-urgent encounters were mostly unchanged. The most common pre-pandemic urgent diagnosis was corneal abrasion (50%), while visual disturbance was most common during the pandemic (92%). During both time periods, eye trauma was the most frequent emergent encounter and conjunctivitis was the most common non-urgent encounter. CONCLUSION: Sociodemographic factors may be associated with different types of PED utilization for ocular conditions. Unnecessary visits constitute major inefficiency from a healthcare-systems standpoint. The marked decrease in PED utilization and differing proportions of ocular conditions encountered during the pandemic may reflect a decrease in incidence of many of those conditions by social distancing; these changes may also reflect altered parental decisions about seeking care.


Asunto(s)
COVID-19 , Adulto , COVID-19/epidemiología , Niño , Servicio de Urgencia en Hospital , Hospitales Pediátricos , Humanos , Pandemias , Estudios Retrospectivos
7.
J Perinatol ; 41(2): 305-309, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-32377010

RESUMEN

OBJECTIVE: To evaluate the utility of screening all extremely preterm infants for retinopathy of prematurity (ROP) at 4 weeks chronologic age, which is earlier than recommended by the 2018 AAP guidelines. STUDY DESIGN: Retrospective analysis of infants <27 weeks gestation from two tertiary NICUs between 2006 and 2018 who survived until first eye examination. RESULTS: 550 infants (gestational age 25.1 ± 1.2 weeks and birth weight 758 ± 323 g) had 1310 examinations performed by 32 weeks postmenstrual age (PMA), and 676 (51.6%) of these were prior to 31 weeks PMA. No examinations in infants prior to 31 weeks PMA met the criteria for laser therapy. Of 87/550 infants (15.8%) who required laser therapy, none did so prior to 32 weeks PMA. CONCLUSIONS: No infants born <27 weeks gestation were found to have severe ROP prior to 31 weeks PMA, supporting the most recent AAP recommendation of initiating ROP screening at 31 weeks PMA for extremely preterm infants.


Asunto(s)
Retinopatía de la Prematuridad , Adulto , Peso al Nacer , Edad Gestacional , Humanos , Lactante , Recien Nacido Extremadamente Prematuro , Recién Nacido , Retinopatía de la Prematuridad/diagnóstico , Retinopatía de la Prematuridad/epidemiología , Estudios Retrospectivos
8.
J Cell Mol Med ; 13(9B): 3939-50, 2009 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-20196788

RESUMEN

Tumour-induced myeloid-derived suppressor cells (MDSC) promote immune suppression and mediate tumour progression. However, the molecular basis for the generation of MDSC, which in mice co-express the CD11b(+) and Gr-1(+) cell surface markers remains unclear. Because CD11b(+)Gr-1(+) cells expand during progressive tumour growth, this suggests that tumour-induced events alter signalling pathways that affect normal myeloid cell development. Interferon regulatory factor-8 (IRF-8), a member of the IFN-gamma regulatory factor family, is essential for normal myelopoiesis. We therefore examined whether IRF-8 modulated tumour-induced CD11b(+)Gr-1(+) cell development or accumulation using both implantable (4T1) and transgenic (MMTV-PyMT) mouse models of mammary tumour growth. In the 4T1 model, both splenic and bone marrow-derived CD11b(+)Gr-1(+) cells of tumour-bearing mice displayed a marked reduction in IRF-8 expression compared to control populations. A causal link between IRF-8 expression and the emergence of tumour-induced CD11b(+)Gr-1(+) cells was explored in vivo using a double transgenic (dTg) mouse model designed to express transgenes for both IRF-8 and mammary carcinoma development. Despite the fact that tumour growth was unaffected, splenomegaly, as well as the frequencies and absolute numbers of CD11b(+)Gr-1(+) cells were significantly lower in dTg mice when compared with single transgenic tumour-bearing mice. Overall, these data reveal that IRF-8 plays an important role in tumour-induced development and/or accumulation of CD11b(+)Gr-1(+) cells, and establishes a molecular basis for the potential manipulation of these myeloid populations for cancer therapy.


Asunto(s)
Antígeno CD11b/biosíntesis , Regulación Neoplásica de la Expresión Génica , Factores Reguladores del Interferón/metabolismo , Células Mieloides/metabolismo , Receptores de Quimiocina/biosíntesis , Animales , Carcinoma/metabolismo , Femenino , Neoplasias Mamarias Animales/metabolismo , Neoplasias Mamarias Experimentales/metabolismo , Ratones , Ratones Endogámicos BALB C , Ratones Endogámicos C57BL , Ratones Transgénicos , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa
9.
JCO Precis Oncol ; 2: 1-11, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-35135100

RESUMEN

PURPOSE: Mutations or copy number abnormalities of genes involved in homologous recombination (HR) occur in pancreatic ductal adenocarcinoma (PDAC). DNA-based measures of HR deficiency (HRD) have been developed and may help identify tumors with better response to DNA-damaging agents. This study aimed to describe the HR pathway mutations and HRD status and determine their association with treatment response and outcome in patients with PDAC. PATIENTS AND METHODS: We performed a retrospective analysis of tumor samples from patients treated at Indiana University for locally advanced or metastatic PDAC. Patients were included if they received gemcitabine plus nanoparticle albumin-bound paclitaxel (control) or fluorouracil, oxaliplatin, leucovorin, and irinotecan (FOLFIRINOX) and had adequate follow-up to assess survival and response to therapy. Tumor analysis generated a three-biomarker HRD score and mutation data for 44 genes. RESULTS: Ninety-one samples met inclusion criteria, and 78 samples (formalin-fixed paraffin-embedded, n = 15; fine-needle aspiration, n = 63) generated mutation data. HRD analysis was successful for 57 samples (HRD score: median, 18; range, 5 to 61); the primary cause of failure was low tumor cellularity. Six BRCA1/2 mutations were detected, four with HRD scores in the top decile (P = .011). There was no statistically significant correlation between HRD score and radiographic response (odds ratio per interquartile range, 1.40; P = .32 adjusted for treatment) in either treatment group. In patients treated with FOLFIRINOX, HRD score dichotomized at the median was not associated with progression-free survival (median, 5.3 v 9.4 months for low v high HRD score, respectively; P = .083) or overall survival (median, 11.9 v 10.7 months for low v high HRD score, respectively; P = .76). CONCLUSION: Mutations in DNA repair genes occur in PDAC, and HRD scores can be generated in the majority of patients. The HRD score was not significantly associated with higher response rate or prolonged survival in patients treated with FOLFIRINOX.

10.
J AAPOS ; 21(1): 23-27, 2017 02.
Artículo en Inglés | MEDLINE | ID: mdl-28087346

RESUMEN

BACKGROUND: Cerebral sinovenous thrombosis (CSVT) has been proposed as an alternative cause of retinal hemorrhage (RH) in children being evaluated for abusive head trauma. This study investigated the prevalence and characteristics of RH in children with CSVT. METHODS: The medical records of children >6 weeks of age with newly diagnosed CSVT and fundus examination by an ophthalmologist were examined retrospectively. Primary outcomes were presence and patterns of RH. RESULTS: A total of 29 children (median age, 9 years; range, 7 weeks to 17 years) were studied. Of these, 5 (17%) had RH, in 4 of whom RH were peripapillary, superficial, intraretinal, and adjacent to a swollen optic disk. In the fifth child, who had meningitis, sepsis, and multiple cerebral infarcts, there were a moderate number of posterior pole intraretinal hemorrhages. Eighteen children (62%) had optic disk swelling. In 13 children, cerebrospinal fluid opening pressure was recorded (range, 27-59 cm H2O). CSVT risk factors included meningitis, mastoiditis, and hypercoagulability. CONCLUSIONS: RH in pediatric CSVT was uncommon. When RHs were present, the appearance matched RH patterns known to be caused by medical conditions, such as raised intracranial pressure and sepsis, also present in these children. These findings suggest that the RHs are due to these other causes and not directly to CSVT itself. In children with CSVT, if RHs are multilayered, extend beyond the peripapillary region into the rest of the posterior pole or retinal periphery, or occur in the absence of optic disk swelling, another etiology for the RH should be sought.


Asunto(s)
Hemorragia Retiniana/etiología , Trombosis de los Senos Intracraneales/complicaciones , Adolescente , Presión del Líquido Cefalorraquídeo , Niño , Preescolar , Estudios Transversales , Femenino , Humanos , Lactante , Presión Intracraneal , Imagen por Resonancia Magnética , Masculino , Papiledema/diagnóstico , Papiledema/etiología , Prevalencia , Hemorragia Retiniana/diagnóstico , Estudios Retrospectivos , Factores de Riesgo , Trombosis de los Senos Intracraneales/diagnóstico por imagen , Tomografía Computarizada por Rayos X
11.
Future Sci OA ; 3(3): FSO221, 2017 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-28884016

RESUMEN

AIM: To validate the analytical performance of a 12-gene molecular assay that predicts distant recurrence for early-stage ER+/HER2- invasive breast cancer as run within a central reference laboratory. MATERIALS & METHODS: Formalin-fixed paraffin-embedded breast resections were evaluated by quantitative reverse transcription polymerase chain reaction for the expression of eight target genes, three housekeeper genes and one control gene to assess for DNA contamination. RESULTS: The assay results were highly correlated with a validated reference laboratory. The assay had a broad linear range for input RNA, with similar amplicon efficiencies for target and housekeeper genes. The assay test was highly reproducible, with comparable inter- and intrabatch precision to the reference laboratory. CONCLUSION: These studies demonstrate that the 12-gene molecular assay is highly robust and accurate.

12.
JAMA ; 296(12): 1469-78, 2006 Sep 27.
Artículo en Inglés | MEDLINE | ID: mdl-17003395

RESUMEN

CONTEXT: Lynch syndrome is caused primarily by mutations in the mismatch repair genes MLH1 and MSH2. OBJECTIVES: To analyze MLH1/MSH2 mutation prevalence in a large cohort of patients undergoing genetic testing and to develop a clinical model to predict the likelihood of finding a mutation in at-risk patients. DESIGN, SETTING, AND PARTICIPANTS: Personal and family history were obtained for 1914 unrelated probands who submitted blood samples starting in the year 2000 for full gene sequencing of MLH1/MSH2. Genetic analysis was performed using a combination of sequence analysis and Southern blotting. A multivariable model was developed using logistic regression in an initial cohort of 898 individuals and subsequently prospectively validated in 1016 patients. The complex model that we have named PREMM(1,2) (Prediction of Mutations in MLH1 and MSH2) was developed into a Web-based tool that incorporates personal and family history of cancer and adenomas. MAIN OUTCOME MEASURE: Deleterious mutations in MLH1/MSH2 genes. RESULTS: Overall, 14.5% of the probands (130/898) carried a pathogenic mutation (MLH1, 6.5%; MSH2, 8.0%) in the development cohort and 15.3% (155/1016) in the validation cohort, with 42 (27%) of the latter being large rearrangements. Strong predictors of mutations included proband characteristics (presence of colorectal cancer, especially > or =2 separate diagnoses, or endometrial cancer) and family history (especially the number of first-degree relatives with colorectal or endometrial cancer). Age at diagnosis was particularly important for colorectal cancer. The multivariable model discriminated well at external validation, with an area under the receiver operating characteristic curve of 0.80 (95% confidence interval, 0.76-0.84). CONCLUSIONS: Personal and family history characteristics can accurately predict the outcome of genetic testing in a large population at risk of Lynch syndrome. The PREMM(1,2) model provides clinicians with an objective, easy-to-use tool to estimate the likelihood of finding mutations in the MLH1/MSH2 genes and may guide the strategy for molecular evaluation.


Asunto(s)
Proteínas Portadoras/genética , Neoplasias Colorrectales Hereditarias sin Poliposis/genética , Pruebas Genéticas , Modelos Estadísticos , Proteína 2 Homóloga a MutS/genética , Proteínas Nucleares/genética , Proteínas Adaptadoras Transductoras de Señales , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Estudios de Cohortes , Femenino , Humanos , Internet , Funciones de Verosimilitud , Modelos Logísticos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Homólogo 1 de la Proteína MutL , Mutación , Probabilidad
13.
J Clin Oncol ; 20(6): 1480-90, 2002 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-11896095

RESUMEN

PURPOSE: To assess the characteristics that correlate best with the presence of mutations in BRCA1 and BRCA2 in individuals tested in a clinical setting. PATIENTS AND METHODS: The results of 10,000 consecutive gene sequence analyses performed to identify mutations anywhere in the BRCA1 and BRCA2 genes (7,461 analyses) or for three specific Ashkenazi Jewish founder mutations (2,539 analyses) were correlated with personal and family history of cancer, ancestry, invasive versus noninvasive breast neoplasia, and sex. RESULTS: Mutations were identified in 1,720 (17.2%) of the 10,000 individuals tested, including 968 (20%) of 4,843 women with breast cancer and 281 (34%) of 824 with ovarian cancer, and the prevalence of mutations was correlated with specific features of the personal and family histories of the individuals tested. Mutations were as prevalent in high-risk women of African (25 [19%] of 133) and other non-Ashkenazi ancestries as those of European ancestry (712 [16%] of 4379) and were significantly less prevalent in women diagnosed before 50 years of age with ductal carcinoma in situ than with invasive breast cancer (13% v 24%, P =.0007). Of the 74 mutations identified in individuals of Ashkenazi ancestry through full sequence analysis of both BRCA1 and BRCA2, 16 (21.6%) were nonfounder mutations, including seven in BRCA1 and nine in BRCA2. Twenty-one (28%) of 76 men with breast cancer carried mutations, of which more than one third occurred in BRCA1. CONCLUSION: Specific features of personal and family history can be used to assess the likelihood of identifying a mutation in BRCA1 or BRCA2 in individuals tested in a clinical setting.


Asunto(s)
Neoplasias de la Mama/genética , Proteínas de Neoplasias/genética , Adulto , Proteína BRCA2/genética , Neoplasias de la Mama Masculina/genética , Distribución de Chi-Cuadrado , Análisis Mutacional de ADN , Femenino , Efecto Fundador , Genes BRCA1 , Predisposición Genética a la Enfermedad , Pruebas Genéticas , Mutación de Línea Germinal , Humanos , Judíos/genética , Masculino , Neoplasias Ováricas/genética , Factores de Riesgo
14.
Biomark Med ; 9(9): 901-10, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26158298

RESUMEN

AIMS: The aim of these studies was to validate the analytical performance of a cell cycle progression (CCP) gene signature that provides prognostic information for early stage lung adenocarcinomas. MATERIALS & METHODS: Formalin-fixed paraffin-embedded (FFPE) lung resections were evaluated by quantitative RT-PCR for the expression of 31 target and 15 housekeeper genes comprising the CCP score. RESULTS: The signature had a standard deviation (SD) of 0.06 score units and a dynamic range spanning CCP scores between -13 and 14. The average amplicon efficiencies for target and housekeeper genes were 107% and 105%, respectively. All but one amplicon had a SD <0.5 CT. CONCLUSION: These studies demonstrate that the gene signature is robust and reproducible, making it suitable for use in a clinical setting.


Asunto(s)
Adenocarcinoma/diagnóstico , Adenocarcinoma/genética , Biomarcadores de Tumor/genética , Perfilación de la Expresión Génica , Genes Relacionados con las Neoplasias/genética , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/genética , Adenocarcinoma/patología , Adenocarcinoma del Pulmón , Ciclo Celular/genética , Proliferación Celular/genética , Humanos , Modelos Lineales , Neoplasias Pulmonares/patología , Estadificación de Neoplasias , Pronóstico , Estabilidad del ARN
15.
J Clin Oncol ; 33(17): 1895-901, 2015 Jun 10.
Artículo en Inglés | MEDLINE | ID: mdl-25847929

RESUMEN

PURPOSE: This study was designed to assess efficacy, safety, and predictors of response to iniparib in combination with gemcitabine and carboplatin in early-stage triple-negative and BRCA1/2 mutation-associated breast cancer. PATIENTS AND METHODS: This single-arm phase II study enrolled patients with stage I to IIIA (T ≥ 1 cm) estrogen receptor-negative (≤ 5%), progesterone receptor-negative (≤ 5%), and human epidermal growth factor receptor 2-negative or BRCA1/2 mutation-associated breast cancer. Neoadjuvant gemcitabine (1,000 mg/m(2) intravenously [IV] on days 1 and 8), carboplatin (area under curve of 2 IV on days 1 and 8), and iniparib (5.6 mg/kg IV on days 1, 4, 8, and 11) were administered every 21 days for four cycles, until the protocol was amended to six cycles. The primary end point was pathologic complete response (no invasive carcinoma in breast or axilla). All patients underwent comprehensive BRCA1/2 genotyping, and homologous recombination deficiency was assessed by loss of heterozygosity (HRD-LOH) in pretreatment core breast biopsies. RESULTS: Among 80 patients, median age was 48 years; 19 patients (24%) had germline BRCA1 or BRCA2 mutations; clinical stage was I (13%), IIA (36%), IIB (36%), and IIIA (15%). Overall pathologic complete response rate in the intent-to-treat population (n = 80) was 36% (90% CI, 27 to 46). Mean HRD-LOH scores were higher in responders compared with nonresponders (P = .02) and remained significant when BRCA1/2 germline mutations carriers were excluded (P = .021). CONCLUSION: Preoperative combination of gemcitabine, carboplatin, and iniparib is active in the treatment of early-stage triple-negative and BRCA1/2 mutation-associated breast cancer. The HRD-LOH assay was able to identify patients with sporadic triple-negative breast cancer lacking a BRCA1/2 mutation, but with an elevated HRD-LOH score, who achieved a favorable pathologic response. Confirmatory controlled trials are warranted.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Proteína BRCA1/genética , Proteína BRCA2/genética , Inestabilidad Genómica , Mastectomía Segmentaria , Terapia Neoadyuvante/métodos , Neoplasias de la Mama Triple Negativas/tratamiento farmacológico , Adulto , Anciano , Benzamidas/administración & dosificación , Carboplatino/administración & dosificación , Desoxicitidina/administración & dosificación , Desoxicitidina/análogos & derivados , Esquema de Medicación , Femenino , Perfilación de la Expresión Génica , Humanos , Persona de Mediana Edad , Mutación , Estadificación de Neoplasias , Resultado del Tratamiento , Neoplasias de la Mama Triple Negativas/genética , Neoplasias de la Mama Triple Negativas/patología , Neoplasias de la Mama Triple Negativas/cirugía , Gemcitabina
16.
J Clin Oncol ; 31(11): 1428-34, 2013 Apr 10.
Artículo en Inglés | MEDLINE | ID: mdl-23460710

RESUMEN

PURPOSE: We aimed to validate a previously described genetic risk score, denoted the cell-cycle progression (CCP) score, in predicting contemporary radical prostatectomy (RP) outcomes. METHODS: RNA was quantified from paraffin-embedded RP specimens. The CCP score was calculated as average expression of 31 CCP genes, normalized to 15 housekeeper genes. Recurrence was defined as two prostate-specific antigen levels ≥ 0.2 ng/mL or any salvage treatment. Associations between CCP score and recurrence were examined, with adjustment for clinical and pathologic variables using Cox proportional hazards regression and partial likelihood ratio tests. The CCP score was assessed for independent prognostic utility beyond a standard postoperative risk assessment (Cancer of the Prostate Risk Assessment post-Surgical [CAPRA-S] score), and a score combining CAPRA-S and CCP was validated. RESULTS: Eighty-two (19.9%) of 413 men experienced recurrence. The hazard ratio (HR) for each unit increase in CCP score (range, -1.62 to 2.16) was 2.1 (95% CI, 1.6 to 2.9); with adjustment for CAPRA-S, the HR was 1.7 (95% CI, 1.3 to 2.4). The score was able to substratify patients with low clinical risk as defined by CAPRA-S ≤ 2 (HR, 2.3; 95% CI, 1.4 to 3.7). Combining the CCP and CAPRA-S improved the concordance index for both the overall cohort and low-risk subset; the combined CAPRA-S + CCP score consistently predicted outcomes across the range of clinical risk. This combined score outperformed both individual scores on decision curve analysis. CONCLUSION: The CCP score was validated to have significant prognostic accuracy after controlling for all available clinical and pathologic data. The score may improve accuracy of risk stratification for men with clinically localized prostate cancer, including those with low-risk disease.


Asunto(s)
Ciclo Celular/genética , Regulación Neoplásica de la Expresión Génica , Prostatectomía/métodos , Neoplasias de la Próstata/genética , Neoplasias de la Próstata/cirugía , Anciano , Proteínas de Ciclo Celular/genética , Estudios de Cohortes , Humanos , Estimación de Kaplan-Meier , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/genética , Evaluación de Resultado en la Atención de Salud/métodos , Evaluación de Resultado en la Atención de Salud/estadística & datos numéricos , Modelos de Riesgos Proporcionales , Antígeno Prostático Específico/análisis , Neoplasias de la Próstata/metabolismo , Reproducibilidad de los Resultados , Medición de Riesgo/métodos , Medición de Riesgo/estadística & datos numéricos
17.
Brachytherapy ; 10(6): 503-7, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21393069

RESUMEN

PURPOSE: To present an interventional case report on the use of plaque brachytherapy for adenocarcinoma of the nonpigmented ciliary epithelium. METHODS AND MATERIALS: A 36-year-old woman with unilateral right eye pain and finger counting vision was noted to have an anterior segment intraocular mass. It extended between the iris and lens and into the pupillary aperture. High-frequency ultrasound imaging revealed a ciliary body origin. A minimally invasive biopsy technique allowed for a cytology and histopathology diagnosis of primary adenocarcinoma of the ciliary epithelium. Treatment was performed with palladium-103 ophthalmic plaque brachytherapy (80-Gy apex). Main outcome measures include visual acuity, local control, radiation complications, and metastatic disease. RESULTS: The patient presented with counting fingers vision, focal angle closure, cataract, and a 5.5-mm thick ciliary body malignancy. At 3 years after radiation therapy and 2.5 years after cataract extraction, her visual acuity was improved to 20/30 and the tumor residua stabilized at 60% of its initial thickness. There has been neither radiation-related keratopathy, retinopathy, optic neuropathy nor metastatic disease. CONCLUSIONS: Plaque brachytherapy was used to treat primary adenocarcinoma of the ciliary epithelium. With 3-year followup, there has been excellent local control, preservation of the eye, and recovery of vision.


Asunto(s)
Adenocarcinoma/radioterapia , Cuerpo Ciliar , Paladio , Radioisótopos/uso terapéutico , Neoplasias de la Úvea/radioterapia , Adenocarcinoma/diagnóstico por imagen , Adenocarcinoma/patología , Adenocarcinoma/cirugía , Adulto , Braquiterapia/métodos , Citoplasma/patología , Epitelio/patología , Femenino , Humanos , Ultrasonografía , Neoplasias de la Úvea/diagnóstico por imagen , Neoplasias de la Úvea/patología , Neoplasias de la Úvea/cirugía , Agudeza Visual
18.
Cancer Prev Res (Phila) ; 3(12): 1579-85, 2010 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-21149333

RESUMEN

Ductal and lobular carcinoma in situ (CIS) accounted for 62,280 (24.5%) of all new breast cancer diagnoses in 2009. BRCA1/2 mutations confer an extremely high risk of breast cancer, and management guidelines for BRCA1/2 mutation carriers advise close follow-up, intensive screening, and consideration of prophylactic surgery to lower this risk. The limited relevant previous data are not definitive in establishing the prevalence of BRCA1/2 mutations in breast CIS patients, creating uncertainty as to whether referral for cancer risk assessment and genetic testing is appropriate for this group. Therefore, we conducted a cross-sectional analysis of the Myriad Genetics BRCA1/2 database to determine the prevalence of these mutations in breast CIS patients. All statistical tests were 2-sided, and confidence intervals (CI) are reported at the 95% level (α = 0.05). The source population was 64,717 consecutive women who were not Ashkenazi Jewish, underwent BRCA1/2 testing, and provided a personal and family history of invasive breast and ovarian cancer; 7,295 (11.3%) reported a diagnosis of CIS (ductal or lobular) and had an overall 5.9% prevalence of mutated BRCA1/2 (mBRCA). Subgrouped by history (personal or family) of invasive breast and/or ovarian cancer, these CIS patients had the following prevalences of mBRCA: (1) no personal or family history, 2.3%; (2) personal history, 5.2%; (3) family history, 5%; and (4) personal and family history, 10.3%. mBRCA risk was significantly higher in women with early-onset (<50 years old) CIS than with late-onset (≥ 50 years old) CIS [odds ratio (OR) = 1.5; 95% CI = 1.1-2.1). Disease onset at less than 40 years age was associated with an even higher mBRCA risk (OR = 1.8; 95% CI = 1.3-2.3). By far the largest analysis of BRCA1/2 mutation prevalence in non-Ashkenazi Jewish breast CIS patients, this study shows that early-onset CIS is associated with mBRCA1/2 in patients referred for genetic testing. When a family history of breast and/or ovarian cancer are also present, testing women with early-onset CIS may increase both the likelihood of detecting BRCA1/2 mutations and opportunities for carriers to consider additional cancer prevention strategies.


Asunto(s)
Proteína BRCA1/genética , Proteína BRCA2/genética , Neoplasias de la Mama/genética , Carcinoma Intraductal no Infiltrante/genética , Carcinoma Lobular/genética , Pruebas Genéticas , Mutación/genética , Neoplasias Ováricas/genética , Anciano , Neoplasias de la Mama/diagnóstico , Carcinoma Intraductal no Infiltrante/diagnóstico , Carcinoma Lobular/diagnóstico , Femenino , Humanos , Persona de Mediana Edad , Neoplasias Ováricas/diagnóstico , Prevalencia , Factores de Riesgo
19.
Cancer ; 115(10): 2222-33, 2009 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-19241424

RESUMEN

BACKGROUND: In women at increased risk for breast and ovarian cancer, the identification of a mutation in breast cancer gene 1 (BRCA1) and BRCA2 has important implications for screening and prevention counseling. Uncertainty regarding the role of BRCA1 and BRCA2 testing in high-risk women from diverse ancestral backgrounds exists because of variability in prevalence estimates of deleterious (disease-associated) mutations in non-white populations. In this study, the authors examined the prevalence of BRCA1 and BRCA2 mutations in an ethnically diverse group of women who were referred for genetic testing. METHODS: In this cross-sectional analysis, the prevalence of BRCA1 and BRCA2 mutations was assessed in a group of non-Ashkenazi Jewish women who underwent genetic testing. RESULTS: From 1996 to 2006, 46,276 women who met study criteria underwent DNA full-sequence analysis of the BRCA1 and BRCA2 genes. Deleterious mutations were identified in 12.5% of women, and recurrent deleterious mutations (prevalence >2%) were identified in all ancestral groups. Women of non-European descent were younger (mean age, 45.9 years; standard deviation [SD], 11.6 years) than European women (mean age, 50 years; SD, 11.9 years; P < .001). Women of African (15.6%; odds ratio [OR], 1.3 [95% confidence interval (95% CI), 1.1-1.5]) and Latin American (14.8%; OR, 1.2 [95% CI, 1.1-1.4]) ancestries had a significantly higher prevalence of deleterious BRCA1 and BRCA2 mutations compared with women of Western European ancestry (12.1%), primarily because of an increased prevalence of BRCA1 mutations in those 2 groups. Non-European ethnicity was associated strongly with having a variant of uncertain significance; however, reclassification decreased variant reporting (from 12.8%-->5.9%), and women of African ancestry experienced the largest decline (58%). CONCLUSIONS: Mutation prevalence was found to be high among women who were referred for clinical BRCA1 and BRCA2 testing, and the risk was similar across diverse ethnicities. BRCA1 and BRCA2 testing is integral to cancer risk assessment in all high-risk women.


Asunto(s)
Neoplasias de la Mama/etnología , Neoplasias de la Mama/genética , Genes BRCA1 , Genes BRCA2 , Adulto , Factores de Edad , Pueblo Asiatico/estadística & datos numéricos , Población Negra/estadística & datos numéricos , Salud de la Familia , Femenino , Humanos , América Latina/etnología , Persona de Mediana Edad , Medio Oriente/etnología , Salud de las Minorías , Mutación , Población Blanca/estadística & datos numéricos
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