Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 136
Filtrar
Más filtros

Banco de datos
Tipo del documento
Intervalo de año de publicación
1.
Adv Anat Pathol ; 31(2): 105-117, 2024 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-37899532

RESUMEN

Renal cell carcinoma (RCC) with tuberous sclerosis complex (TSC)/mammalian target of rapamycin (MTOR) pathway-related genomic alterations have been classically described in hereditary TSC syndrome setting involving germline mutations, whereby cells with a bi-allelic inactivation of genes originate tumors in a classic tumor-suppressor "two-hit" Knudson paradigm. Initial studies of TSC-associated RCC categorized tumors into 3 broad heterogeneous morphologic groups: RCC with smooth muscle stroma, chromophobe-like, and eosinophilic-macrocytic. Recently, a similar morphologic spectrum has been increasingly recognized in novel and emerging entities characterized by somatic mutations in the TSC1/2 and MTOR in patients who do not suffer from the TSC. Correct recognition of RCC with TSC / MTOR mutations is critical for accurate prognostication because such tumors with aggressive behavior have the potential to be tailored to mTOR inhibitors. Whether TSC/MTOR mutated renal epithelial neoplasms represent a distinct molecular class has been confounded by the fact that TSC1/2 , and the gene encoding the downstream protein MTOR, are mutated secondarily in ∼5% of the more common subtypes of RCC, including the commonest subtype of clear cell RCC. This review summarizes the expanding morphologic spectrum of renal tumors with TSC/mTOR pathway alterations, specifically for sporadically occurring tumors where these genomic alterations likely are primary pathologic events. Finally, a practical surgical pathology approach to handling these tumors, and a conceptual framework of renal epithelial tumors with TSC/MTOR mutations as a "family of tumors", is presented.


Asunto(s)
Carcinoma de Células Renales , Neoplasias Renales , Esclerosis Tuberosa , Humanos , Carcinoma de Células Renales/genética , Proteína 2 del Complejo de la Esclerosis Tuberosa/genética , Neoplasias Renales/patología , Serina-Treonina Quinasas TOR/genética , Esclerosis Tuberosa/complicaciones , Genómica
2.
J Comput Assist Tomogr ; 47(1): 38-44, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-35995580

RESUMEN

BACKGROUND: The prostatic apex is the most frequent location of positive surgical margin (PSM) after surgery. Data regarding the ability of multiparametric magnetic resonance imaging (mpMRI) to prospectively identify men at risk for apical PSMs (aPSMs) using a structured report are lacking. OBJECTIVES: The aims of the study are to determine and to compare the rate of aPSM in men with versus without prospectively flagged at-risk prostate lesions during clinical mpMRI interpretation using whole-mount histopathology as the reference standard. METHODS: This single-center, retrospective study of prospectively collected data included treatment-naive men with abnormal 3T mpMRI (PI-RADS v2 score ≥3) between January 2016 and December 2018 followed by surgery. During routine clinical interpretation, radiologists flagged prostate lesions abutting the apical most gland and/or encircling the distal most prostatic urethra using standardized language available as a "pick list" option in the structured report. Logistic regression was used to compare the rate of PSM in 2 groups (flagged vs nonflagged men). Propensity score covariate adjustment corrected for potential selection bias according to age, prostate-specific antigen (PSA), PSA density, grade group, and pT stage. The estimate was further adjusted by including surgeon as a covariate. RESULTS: A total of 428 men were included. A statistically significant higher proportion of aPSMs was noted in flagged (56% [51/91]) compared with nonflagged apical lesions (31% [105/337]; adjusted odds ratio, 2.5; 95% confidence interval, 1.6-4.1; P < 0.01). The difference in aPSM between both groups also varied according to the surgeon performing the RP. Prostate-specific antigen, PSA density, lesion size, apical location, Prostate Imaging Reporting & Data System score, grade group, pT stage, and surgeon's experience were associated with higher PSM rate. Biochemical recurrence, defined as PSA greater than 0.2 ng/mL on 2 measurements after RP, was significantly associated with PSM status (propensity score adjusted odds ratio, 3.1; 95% confidence interval, 1.8-5.3; P < 0.0001); however, patients flagged by radiologists did not have a significant difference in biochemical recurrence rates as compared with nonflagged patients ( P = 0.11). CONCLUSIONS: Standard language built into structured reports for mpMRI of the prostate helps identify preoperatively patients at risk for aPSM. CLINICAL IMPACT: Multiparametric MRI is able to identify patients at increased risk for aPSM, and this information can be conveyed in a structured report to urologists, facilitating patient counseling and treatment decisions.


Asunto(s)
Imágenes de Resonancia Magnética Multiparamétrica , Neoplasias de la Próstata , Masculino , Humanos , Próstata/diagnóstico por imagen , Próstata/cirugía , Próstata/patología , Antígeno Prostático Específico , Márgenes de Escisión , Neoplasias de la Próstata/diagnóstico por imagen , Neoplasias de la Próstata/cirugía , Neoplasias de la Próstata/patología , Imagen por Resonancia Magnética/métodos , Estudios Retrospectivos , Prostatectomía/métodos
3.
Mod Pathol ; 35(10): 1468-1474, 2022 10.
Artículo en Inglés | MEDLINE | ID: mdl-35606411

RESUMEN

Locally relapsed prostate cancer (PCa) after radiation therapy (RT) is associated with substantial morbidity and mortality. Morphological and molecular consequences that may contribute to RT resistance and local recurrence remain poorly understood. Locally recurrent PCa tissue from 53 patients with clinically localized PCa who failed with primary RT and subsequently underwent salvage radical prostatectomy (RP) was analyzed for tumor focality, clinicopathological, molecular, and genomic characteristics. Targeted next-generation sequencing with full exon coverage of 1,425 cancer-related genes was performed on 10 representative radiorecurrent PCas exhibiting no RT effect with matched adjacent benign prostate tissue. At RP, 37 (70%) of PCas had no RT effect with the following characteristics: grade group (GG) ≥ 3 (70%), unifocal tumor (75%), extraprostatic disease (78%), lymph node metastasis (8%), and "cribriform" morphologies (84%) [cribriform PCa (78%) or intraductal carcinoma (IDC-P) (61%)] at a median percentage of approximately 80% of tumor volume. In the setting of multifocal tumors (25%) at RP, the cribriform morphologies were restricted to index tumors. Of 32 patients with available pre-RT biopsy information, 16 had GG1 PCa, none had cribriform morphologies at baseline but 81% demonstrated cribriform morphologies at RP. Notable alterations detected in the sequenced tumors included: defects in DNA damage response and repair (DDR) genes (70%) (TP53, BRCA2, PALB2, ATR, POLQ), PTEN loss (50%), loss of 8p (80%), and gain of MYC (70%). The median tumor mutational burden was 4.18 mutations/Mb with a range of 2.16 to 31.86. Our findings suggest that most radiorecurrent PCas are enriched in cribriform morphologies with potentially targetable genomic alterations. Understanding this phenotypic and genotypic diversity of radiorecurrent PCa is critically important to facilitate optimal patient management.


Asunto(s)
Adenocarcinoma , Carcinoma Intraductal no Infiltrante , Neoplasias de la Próstata , Adenocarcinoma/genética , Adenocarcinoma/patología , Adenocarcinoma/radioterapia , Carcinoma Intraductal no Infiltrante/patología , Genómica , Humanos , Masculino , Clasificación del Tumor , Recurrencia Local de Neoplasia/genética , Recurrencia Local de Neoplasia/patología , Recurrencia Local de Neoplasia/radioterapia , Prostatectomía , Neoplasias de la Próstata/genética , Neoplasias de la Próstata/patología , Neoplasias de la Próstata/radioterapia
4.
Adv Anat Pathol ; 29(3): 168-177, 2022 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-35249990

RESUMEN

Renal cell carcinoma (RCC) with fibromyomatous stroma (FMS) was included as an "emerging/provisional" entity in the 2016 World Health Organization (WHO) classification as a "RCC with (angio) leiomyomatous stroma." It has been debated whether RCCFMS represents a separate entity or a group of RCCs with overlapping morphologies. Accordingly, various names have been used to refer to the RCCs that exhibited clear cells and prominent smooth muscle and fibromatous stroma. Recent studies have demonstrated that RCCFMS indeed represents a distinct entity with subtle but distinguishable features that can be separated from other RCCs that exhibit clear cells, as well as tubulopapillary morphology and smooth muscle/fibromatous stroma, such as clear cell RCC and clear cell papillary RCC. Microscopically, the epithelial component forms tumor nodules composed of elongated and frequently branching tubules, lined by clear or mildly eosinophilic cells containing voluminous cytoplasm. Focal papillary morphology is also frequently present. Diffuse CK7 positivity is typical and is required for the diagnosis. Molecular analysis of these tumors demonstrated recurrent mutations involving the TSC/mTOR pathway. A subset of tumors with similar morphology has shown mutations involving ELOC (previously referred to as TCEB1), typically associated with monosomy 8. Finally, in addition to the more common RCCFMS that are sporadic, essentially identical tumors have been found in patients with tuberous sclerosis complex, suggesting the existence of hereditary and sporadic counterparts of this tumor. It is currently debated whether TSC/mTOR and ELOC mutated RCCFMS should be grouped together, based on their shared and overlapping morphology and common CK7 reactivity, despite the differing molecular alterations. This review outlines evidence supporting the recognition of RCCFMS as a novel subtype of RCC with morphologic, immunohistochemical, and molecular characteristics distinct from clear cell RCC and clear cell papillary RCC.


Asunto(s)
Carcinoma de Células Renales , Neoplasias Renales , Esclerosis Tuberosa , Biomarcadores de Tumor/análisis , Carcinoma de Células Renales/genética , Carcinoma de Células Renales/patología , Humanos , Neoplasias Renales/patología , Serina-Treonina Quinasas TOR/genética , Esclerosis Tuberosa/patología
5.
Mod Pathol ; 34(7): 1392-1424, 2021 07.
Artículo en Inglés | MEDLINE | ID: mdl-33664427

RESUMEN

The Genitourinary Pathology Society (GUPS) reviewed recent advances in renal neoplasia, particularly post-2016 World Health Organization (WHO) classification, to provide an update on existing entities, including diagnostic criteria, molecular correlates, and updated nomenclature. Key prognostic features for clear cell renal cell carcinoma (RCC) remain WHO/ISUP grade, AJCC/pTNM stage, coagulative necrosis, and rhabdoid and sarcomatoid differentiation. Accrual of subclonal genetic alterations in clear cell RCC including SETD2, PBRM1, BAP1, loss of chromosome 14q and 9p are associated with variable prognosis, patterns of metastasis, and vulnerability to therapies. Recent National Comprehensive Cancer Network (NCCN) guidelines increasingly adopt immunotherapeutic agents in advanced RCC, including RCC with rhabdoid and sarcomatoid changes. Papillary RCC subtyping is no longer recommended, as WHO/ISUP grade and tumor architecture better predict outcome. New papillary RCC variants/patterns include biphasic, solid, Warthin-like, and papillary renal neoplasm with reverse polarity. For tumors with 'borderline' features between oncocytoma and chromophobe RCC, a term "oncocytic renal neoplasm of low malignant potential, not further classified" is proposed. Clear cell papillary RCC may warrant reclassification as a tumor of low malignant potential. Tubulocystic RCC should only be diagnosed when morphologically pure. MiTF family translocation RCCs exhibit varied morphologic patterns and fusion partners. TFEB-amplified RCC occurs in older patients and is associated with more aggressive behavior. Acquired cystic disease (ACD) RCC-like cysts are likely precursors of ACD-RCC. The diagnosis of renal medullary carcinoma requires a negative SMARCB1 (INI-1) expression and sickle cell trait/disease. Mucinous tubular and spindle cell carcinoma (MTSCC) can be distinguished from papillary RCC with overlapping morphology by losses of chromosomes 1, 4, 6, 8, 9, 13, 14, 15, and 22. MTSCC with adverse histologic features shows frequent CDKN2A/2B (9p) deletions. BRAF mutations unify the metanephric family of tumors. The term "fumarate hydratase deficient RCC" ("FH-deficient RCC") is preferred over "hereditary leiomyomatosis and RCC syndrome-associated RCC". A low threshold for FH, 2SC, and SDHB immunohistochemistry is recommended in difficult to classify RCCs, particularly those with eosinophilic morphology, occurring in younger patients. Current evidence does not support existence of a unique tumor subtype occurring after chemotherapy/radiation in early childhood.


Asunto(s)
Neoplasias Renales , Humanos , Organización Mundial de la Salud
6.
Mod Pathol ; 34(6): 1167-1184, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-33526874

RESUMEN

The Genitourinary Pathology Society (GUPS) undertook a critical review of the recent advances in renal neoplasia, particularly focusing on the newly accumulated evidence post-2016 World Health Organization (WHO) classification. In the era of evolving histo-molecular classification of renal neoplasia, morphology is still key. However, entities (or groups of entities) are increasingly characterized by specific molecular features, often associated either with recognizable, specific morphologies or constellations of morphologies and corresponding immunohistochemical profiles. The correct diagnosis has clinical implications leading to better prognosis, potential clinical management with targeted therapies, may identify hereditary or syndromic associations, which may necessitate appropriate genetic testing. We hope that this undertaking will further facilitate the identification of these entities in practice. We also hope that this update will bring more clarity regarding the evolving classification of renal neoplasia and will further reduce the category of "unclassifiable renal carcinomas/tumors". We propose three categories of novel entities: (1) "Novel entity", validated by multiple independent studies; (2) "Emerging entity", good compelling data available from at least two or more independent studies, but additional validation is needed; and (3) "Provisional entity", limited data available from one or two studies, with more work required to validate them. For some entities initially described using different names, we propose new terminologies, to facilitate their recognition and to avoid further diagnostic dilemmas. Following these criteria, we propose as novel entities: eosinophilic solid and cystic renal cell carcinoma (ESC RCC), renal cell carcinoma with fibromyomatous stroma (RCC FMS) (formerly RCC with leiomyomatous or smooth muscle stroma), and anaplastic lymphoma kinase rearrangement-associated renal cell carcinoma (ALK-RCC). Emerging entities include: eosinophilic vacuolated tumor (EVT) and thyroid-like follicular renal cell carcinoma (TLFRCC). Finally, as provisional entities, we propose low-grade oncocytic tumor (LOT), atrophic kidney-like lesion (AKLL), and biphasic hyalinizing psammomatous renal cell carcinoma (BHP RCC).


Asunto(s)
Neoplasias Renales/clasificación , Humanos , Neoplasias Renales/diagnóstico , Neoplasias Renales/patología
7.
Adv Anat Pathol ; 28(4): 179-195, 2021 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-34128483

RESUMEN

The Genitourinary Pathology Society (GUPS) undertook a critical review of the recent advances in bladder neoplasia with a focus on issues relevant to the practicing surgical pathologist for the understanding and effective reporting of bladder cancer, emphasizing particularly on the newly accumulated evidence post-2016 World Health Organization (WHO) classification. The work is presented in 2 manuscripts. Here, in the first, we revisit the nomenclature and classification system used for grading flat and papillary urothelial lesions centering on clinical relevance, and on dilemmas related to application in routine reporting. As patients of noninvasive bladder cancer frequently undergo cystoscopy and biopsy in their typically prolonged clinical course and for surveillance of disease, we discuss morphologies presented in these scenarios which may not have readily applicable diagnostic terms in the WHO classification. The topic of inverted patterns in urothelial neoplasia, particularly when prominent or exclusive, and beyond inverted papilloma has not been addressed formally in the WHO classification. Herein we provide a through review and suggest guidelines for when and how to report such lesions. In promulgating these GUPS recommendations, we aim to provide clarity on the clinical application of these not so uncommon diagnostically challenging situations encountered in routine practice, while also importantly advocating consistent terminology which would inform future work.


Asunto(s)
Carcinoma Papilar/patología , Carcinoma de Células Transicionales/patología , Neoplasias Urológicas/patología , Humanos , Clasificación del Tumor , Urotelio/patología
8.
Adv Anat Pathol ; 28(4): 196-208, 2021 07 01.
Artículo en Inglés | MEDLINE | ID: mdl-34128484

RESUMEN

The Genitourinary Pathology Society (GUPS) undertook a critical review of the recent advances in bladder cancer focusing on important topics of high interest for the practicing surgical pathologist and urologist. This review represents the second of 2 manuscripts ensuing from this effort. Herein, we address the effective reporting of bladder cancer, focusing particularly on newly published data since the last 2016 World Health Organization (WHO) classification. In addition, this review focuses on the importance of reporting bladder cancer with divergent differentiation and variant (subtypes of urothelial carcinoma) histologies and the potential impact on patient care. We provide new recommendations for reporting pT1 staging in diagnostic pathology. Furthermore, we explore molecular evolution and classification, emphasizing aspects that impact the understanding of important concepts relevant to reporting and management of patients.


Asunto(s)
Carcinoma de Células Transicionales/patología , Inmunoterapia , Neoplasias Urológicas/patología , Biomarcadores de Tumor/metabolismo , Carcinoma de Células Transicionales/tratamiento farmacológico , Carcinoma de Células Transicionales/metabolismo , Humanos , Estadificación de Neoplasias , Neoplasias Urológicas/tratamiento farmacológico , Neoplasias Urológicas/metabolismo
9.
Prostate ; 79(11): 1267-1273, 2019 08.
Artículo en Inglés | MEDLINE | ID: mdl-31111513

RESUMEN

BACKGROUND: The loss of PTEN tumor suppressor gene is one of the most common somatic genetic aberrations in prostate cancer (PCa) and is frequently associated with high-risk disease. Deletion or mutation of at least one PTEN allele has been reported to occur in 20% to 40% of localized PCa and up to 60% of metastases. The goal of this study was to determine if somatic alteration detected by PTEN immunohistochemical loss of expression is associated with specific histologic features. METHODS: Two hundred sixty prostate core needle biopsies with PCa were assessed for PTEN loss using an analytically validated immunohistochemical assay. Blinded to PTEN status, each tumor was assessed for the Grade Group (GG) and the presence or absence of nine epithelial features. Presence of stromogenic PCa was also assessed and defined as grade 3 reactive tumor stroma as previously described: the presence of carcinoma associated stromal response with epithelial to stroma ratio of greater than 50% reactive stroma. RESULTS: Eight-eight (34%) cases exhibited PTEN loss while 172 (66%) had intact PTEN. PTEN loss was significantly (P < 0.05) associated with increasing GG, poorly formed glands (74% of total cases with loss vs 49% of intact), and three well-validated unfavorable pathological features: intraductal carcinoma of the prostate (IDC-P) (69% of total cases with loss vs 12% of intact), cribriform Gleason pattern 4 (38% of total cases with loss vs 10% of intact) and stromogenic PCa (23% of total cases with loss vs 6% of intact). IDC-P had the highest relative risk (4.993, 95% confidence interval, 3.451-7.223, P < 0.001) for PTEN loss. At least one of these three unfavorable pathological features were present in 67% of PCa exhibiting PTEN loss, while only 11% of PCa exhibited PTEN loss when none of these three unfavorable pathological features were present. CONCLUSIONS: PCa with PTEN loss demonstrates a strong correlation with known unfavorable histologic features, particularly IDC-P. This is the first study showing the association of PTEN loss with stromogenic PCa.


Asunto(s)
Adenocarcinoma/genética , Carcinoma Intraductal no Infiltrante/genética , Fosfohidrolasa PTEN/genética , Neoplasias de la Próstata/genética , Adenocarcinoma/metabolismo , Adenocarcinoma/patología , Alelos , Biomarcadores de Tumor , Carcinoma Intraductal no Infiltrante/metabolismo , Carcinoma Intraductal no Infiltrante/patología , Humanos , Masculino , Mutación , Clasificación del Tumor , Fosfohidrolasa PTEN/metabolismo , Neoplasias de la Próstata/metabolismo , Neoplasias de la Próstata/patología
10.
Histopathology ; 75(3): 346-353, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31012493

RESUMEN

AIMS: Intraductal proliferations of the prostate with more complexity and/or cytological atypia than high-grade prostate intra-epithelial neoplasia (HGPIN), but falling short of intraductal carcinoma (IDC-P), are described as 'atypical intraductal proliferation' (AIP). When present in needle biopsy (NBX) without IDC-P, the clinical significance is not known. METHODS AND RESULTS: Sixty-two NBX cases were diagnosed as AIP over 7 years with estimated incidence of 1%. AIP was characterised by loose cribriform architecture (90%) or non-cribriform architecture exhibiting significant nuclear atypia that fell short of IDC-P. Fifty patients had concomitant PCa (20% grade group (GG) 1, 48% GG2, 14% GG3, 8% GG4 and 10% GG 5), and 12 had AIP alone. Of 40 patients who were candidates for no therapy (AIP alone) or active surveillance (AIP with GG1 or GG2 PCa without cribriform pattern 4), 20 had subsequent follow-up pathology [seven NBXs and 13 radical prostatectomy (RP)]. Of the 12 AIP only patients, six had a subsequent biopsy diagnosis of: benign prostate (two), IDC-P with PCa (one) and PCa (three). One or more adverse pathological features at subsequent RP were present in 93% of patients with AIP and GG1 or GG2 PCa, defined as: GG ≥ 3 (15%), IDC-P (77%), cribriform Gleason pattern 4 (69%), pT3a (77%) or pT3b (8%). CONCLUSIONS: AIP in NBX may be a marker of unsampled IDC-P and/or other adverse pathological features in suspected low- to intermediate-risk PCa. AIP should be considered distinct from HGPIN for risk assessment and warrant consideration for further work-up to detect unsampled high-risk PCa.


Asunto(s)
Neoplasia Intraepitelial Prostática/patología , Neoplasias de la Próstata/patología , Anciano , Anciano de 80 o más Años , Biopsia con Aguja , Humanos , Masculino , Persona de Mediana Edad
12.
Adv Anat Pathol ; 31(2): 59-60, 2024 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-38158731
15.
Histopathology ; 71(5): 693-702, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-28570007

RESUMEN

AIMS: Atypical intraductal proliferation (AIP) of the prostate is histologically worse than high-grade prostate intraepithelial neoplasia, but lacks the diagnostic criteria of intraductal carcinoma of the prostate (IDC-P). The aim of this study was to compare the clinicopathological and molecular characteristics (ERG overexpression and PTEN loss) of AIP and IDC-P in core needle biopsies. METHODS AND RESULTS: One hundred and six [84 (5.6%) of 1480 consecutive and 22 retrospectively collected] cases met the criteria: AIP only (2.4%), IDC-P only (1.3%), and IDC-P coexisting with AIP (2%). Invasive adenocarcinoma [prostate adenocarcinoma (PCa)] was present in 96% and 97% cases of AIP and IDC-P, respectively. The mean number of glands/focus and the largest gland diameter for AIP and IDC-P were 7.6 (range, 2-27) and 11.7 (range, 1-51), and 0.59 mm (range, 0.2-1.1 mm) and 0.75 mm (range, 0.2-1.8 mm), respectively. For AIP, loose cribriform architecture was the most common (93%) morphology. IDC-P-associated PCa had more aggressive pathology, including the highest combined Gleason score (GS), high-grade GS ≥ 4 + 3, and largest percentage involvement of core by PCa and percentage positive cores, than AIP-associated PCa (P < 0.05). Within the AIP group, ERG status and PTEN status were similar to those of adjacent PCa in 97% and 88% of cases, respectively. Within the IDC-P group, ERG status and PTEN status were similar among IDC-P, AIP and PCa in 96% and 91% of cases, respectively. PTEN loss was frequently heterogeneous in PCa, and localized adjacent to AIP or IDC-P. CONCLUSIONS: AIP represents a lower-grade morphological spectrum of IDC-P, associated with intermediate-risk PCa. Patients with only AIP need an immediate repeat biopsy to rule out clinically significant PCa.


Asunto(s)
Carcinoma Ductal/patología , Lesiones Precancerosas/patología , Neoplasia Intraepitelial Prostática/patología , Neoplasias de la Próstata/patología , Anciano , Anciano de 80 o más Años , Biomarcadores de Tumor/análisis , Biopsia con Aguja Gruesa , Humanos , Masculino , Persona de Mediana Edad
16.
Histopathology ; 71(1): 150-155, 2017 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-28316088

RESUMEN

AIMS: Patients who have undergone prostate radiation are at increased risk for developing urothelial carcinoma. Radiation changes can cause significant cytological atypia in benign prostate glands that may mimic pagetoid spread of urothelial carcinoma. GATA3 is a common marker for differentiating prostatic adenocarcinoma from urothelial carcinoma. The aim of this study was to investigate the expression of GATA3 in the epithelium of irradiated benign and malignant prostate tissue. METHODS AND RESULTS: We performed a retrospective review of prostate cases with radiation atypia. GATA3 staining was performed on benign prostate tissue with and without radiation atypia, as well as on residual/recurrent prostatic adenocarcinoma after radiation therapy. PIN4 immunohistochemical (IHC) staining was performed on prostate tissue with radiation atypia to confirm the presence of both basal and luminal cells. We identified 31 cases with benign prostate glands containing radiation atypia. The average time between treatment with radiation therapy and the surgical procedure was 10 years (range 5-20 years). PIN4 IHC staining confirmed the presence of basal and luminal cells in benign prostate glands with radiation atypia. Thirty-one of 31 (100%) cases of benign prostate tissue with radiation atypia showed staining for GATA3 in both basal and luminal cells. Eight of eight (100%) cases of benign prostate glands without radiation atypia and no inflammatory changes showed GATA3 positivity limited to basal cells. GATA3 was negative in 12/12 (100%) cases of prostatic adenocarcinoma after radiation therapy. CONCLUSION: Benign prostate glands with radiation atypia show diffuse positivity for GATA3. This staining pattern, along with the cytological atypia resulting from radiation, can mimic urothelial carcinoma.


Asunto(s)
Biomarcadores de Tumor/análisis , Factor de Transcripción GATA3/biosíntesis , Neoplasias Inducidas por Radiación/diagnóstico , Próstata/patología , Traumatismos por Radiación/diagnóstico , Adenocarcinoma/diagnóstico , Anciano , Carcinoma de Células Transicionales/diagnóstico , Diagnóstico Diferencial , Factor de Transcripción GATA3/análisis , Humanos , Masculino , Persona de Mediana Edad , Próstata/efectos de la radiación , Neoplasias de la Próstata/diagnóstico , Estudios Retrospectivos
18.
Pathol Int ; 66(5): 260-72, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26991008

RESUMEN

Since its initial description in 1966 by Dr Donald Gleason, Gleason grading has become the cornerstone in the management of prostate cancer (PCa). With widespread use of Prostate Specific Antigen (PSA) screening and needle core biopsy, the diagnosis and management of PCa have dramatically evolved. In addition, better understanding of the morphological spectrum of prostate cancer and its clinical significance have prompted the refinement of the grading criteria and reporting guidelines commensurate to contemporary practice. The modification of the Gleason grading system implemented by the International Society of Urological Pathology in 2005 and subsequent revision in 2014 has profoundly impacted how PCa is graded and managed. This review aims to provide a concise update on the refinement of the histological criteria for various Gleason patterns and problem areas of Gleason grading, and provide recommendations on how to improve the grading reproducibility. The new proposal to group Gleason scores into clinically meaningful "grade groups" will also be discussed. Finally, we will discuss how magnetic resonance imaging (MRI)-targeted biopsy and emerging genetic markers may help improve the Gleason grading accuracy and risk stratification currently based on clinicopathological parameters.


Asunto(s)
Imagen por Resonancia Magnética , Neoplasias de la Próstata/diagnóstico , Biopsia , Humanos , Masculino , Clasificación del Tumor , Antígeno Prostático Específico/sangre , Neoplasias de la Próstata/sangre , Neoplasias de la Próstata/diagnóstico por imagen , Neoplasias de la Próstata/patología , Reproducibilidad de los Resultados
19.
Nat Genet ; 39(1): 41-51, 2007 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-17173048

RESUMEN

Despite efforts to profile prostate cancer, the genetic alterations and biological processes that correlate with the observed histological progression are unclear. Using laser-capture microdissection to isolate 101 cell populations, we have profiled prostate cancer progression from benign epithelium to metastatic disease. By analyzing expression signatures in the context of over 14,000 'molecular concepts', or sets of biologically connected genes, we generated an integrative model of progression. Molecular concepts that demarcate critical transitions in progression include protein biosynthesis, E26 transformation-specific (ETS) family transcriptional targets, androgen signaling and cell proliferation. Of note, relative to low-grade prostate cancer (Gleason pattern 3), high-grade cancer (Gleason pattern 4) shows an attenuated androgen signaling signature, similar to metastatic prostate cancer, which may reflect dedifferentiation and explain the clinical association of grade with prognosis. Taken together, these data show that analyzing gene expression signatures in the context of a compendium of molecular concepts is useful in understanding cancer biology.


Asunto(s)
Perfilación de la Expresión Génica , Modelos Teóricos , Neoplasias de la Próstata/genética , Neoplasias de la Próstata/patología , Andrógenos/metabolismo , Progresión de la Enfermedad , Humanos , Masculino , Metástasis de la Neoplasia , Hiperplasia Prostática/genética , Hiperplasia Prostática/patología , Neoplasia Intraepitelial Prostática/genética , Neoplasia Intraepitelial Prostática/patología , Transducción de Señal , Integración de Sistemas
20.
Cancer Cell ; 12(5): 419-31, 2007 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-17996646

RESUMEN

The Polycomb group (PcG) protein EZH2 possesses oncogenic properties for which the underlying mechanism is unclear. We integrated in vitro cell line, in vivo tumor profiling, and genome-wide location data to nominate key targets of EZH2. One of the candidates identified was ADRB2 (Adrenergic Receptor, Beta-2), a critical mediator of beta-adrenergic signaling. EZH2 is recruited to the ADRB2 promoter and represses ADRB2 expression. ADRB2 inhibition confers cell invasion and transforms benign prostate epithelial cells, whereas ADRB2 overexpression counteracts EZH2-mediated oncogenesis. ADRB2 is underexpressed in metastatic prostate cancer, and clinically localized tumors that express lower levels of ADRB2 exhibit a poor prognosis. Taken together, we demonstrate the power of integrating multiple diverse genomic data to decipher targets of disease-related genes.


Asunto(s)
Proteínas de Unión al ADN/metabolismo , Silenciador del Gen , Genómica , Neoplasias de la Próstata/genética , Neoplasias de la Próstata/metabolismo , Receptores Adrenérgicos beta 2/fisiología , Factores de Transcripción/metabolismo , Animales , Línea Celular Tumoral , Transformación Celular Neoplásica , Proteína Potenciadora del Homólogo Zeste 2 , Humanos , Masculino , Ratones , Ratones Endogámicos BALB C , Modelos Biológicos , Trasplante de Neoplasias , Complejo Represivo Polycomb 2 , Regiones Promotoras Genéticas , Receptores Adrenérgicos beta 2/metabolismo
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA