The invasive margin of early-stage human colon tumors is infiltrated with neutrophils of an antitumoral phenotype.

Neutrophils infiltrate several types of cancer; however, whether their presence is associated with disease progression remains controversial. Here, we show that colon tumors overexpress neutrophil chemoattractants compared to healthy tissues, leading to their recruitment to the invasive margin and the central part of colon tumors. Of note, tumor-associated neutrophils expressing tumor necrosis factor α, which usually represents an antitumoral phenotype, were predominantly located in the invasive margin. Tumor-associated neutrophils from the invasive margin displayed an antitumoral phenotype with higher ICAM-1 and CD95 expression than neutrophils from healthy adjacent tissues. A higher neutrophil/lymphocyte ratio was found at later stages compared to the early phases of colon cancer. A neutrophil/lymphocyte ratio ≤3.5 predicted tumor samples had significantly more neutrophils at the invasive margin and the central part. Moreover, tumor-associated neutrophils at the invasive margin of early-stage tumors showed higher ICAM-1 and CD95 expression. Coculture of colon cancer cell lines with primary neutrophils induced ICAM-1 and CD95 expression, confirming our in situ findings. Thus, our data demonstrate that tumor-associated neutrophils with an antitumoral phenotype characterized by high ICAM-1 and CD95 expression infiltrate the invasive margin of early-stage colon tumors, suggesting that these cells can combat the disease at its early courses. The presence of tumor-associated neutrophils with antitumoral phenotype could help predict outcomes of patients with colon cancer.

Paraneoplastic Cerebellar Degeneration Secondary to BRAF Mutant Melanoma Metastasis from an Occult Primary Cancer.

Melanoma metastasis from an unknown primary cancer has an incidence of 3.2% among melanoma patients. Furthermore, paraneoplastic neurological syndromes (PNS) are rare, occurring in 1-3% of patients with malignancies. Paraneoplastic cerebellar degeneration (PCD) is one of the classic PNS and is characterized by acute or subacute onset of ataxia and/or presence of onconeural antibodies. A 61-year-old male with ataxia, vertigo, and headache later developed dysarthria, multidirectional nystagmus, hyperactive delirium, auditory hallucinations, psychomotor agitation, and myoclonus. Toxicological, metabolic, infectious, and autoimmune etiologies were assessed and reported negative. An osteolytic lesion was observed in the right iliac crest via computed tomography (CT). A positron emission tomography-CT reported increased fluorodeoxyglucose uptake of a right iliac and right inguinal ganglion. After biopsy of the right inguinal ganglion, a BRAF mutation-positive melanoma metastasis from an occult primary cancer was diagnosed. Dermatologic, ophthalmologic, and endoscopic gastrointestinal assessment did not reveal a primary malignant melanoma. The patient's movement disorders and neuropsychiatric symptoms improved with quetiapine, prednisone, azathioprine, and cyclophosphamide. Oncological management was conducted with MAPK pathway inhibitors (i.e., dabrafenib and trametinib). Movement disorders associated with neuropsychiatric symptoms are complex to diagnose. PNS are rare and often associated with antibodies against neural antigens expressed by the tumor. The case presented above describes a patient with a BRAF-positive malignant melanoma metastasis from an occult primary associated with PCD - to the best of our knowledge, the first reported in the literature.

Esclerosis sistémica y neoplasias, a propósito de un estudio en la provincia de Holguín / Systemic Sclerosis and neoplastic purpose of a study at Holguin province

La esclerosis sistémica (ES) es una enfermedad de causa desconocida, que se caracteriza por una producción exagerada de moléculas que componen la matriz extracelular. La disminución en la producción de óxido nítrico por las células endoteliales de la microvasculatura parece desempeñar un papel central en la patogenia de la enfermedad. Los resultados alcanzados en un estudio de serie de casos de un universo de 44 pacientes y muestra de 31, con baja incidencia de las causas neoplásicas en la muerte y como reacciones secundarias a tratamiento inmunosupresor con ciclofosfamida, según la conducta terapéutica aplicada, fue el motivo para la presentación de este trabajo, que reflejó la posible relación entre la esclerosis sistémica y las neoplasias. Se concluyó que la relación entre autoinmunidad y cáncer puede ser el resultado de un origen etiológico común (genético, hormonal, metabólico o factores ambientales) o un mecanismo de síndrome paraneoplásico. La enfermedad es terreno de riesgo para la ocurrencia de neoplasias, así como las neoplasias pueden inducir ES(AU)

The systemic sclerosis (SS) is a disease of unknown cause, that the fact that they fix the extra-cell womb characterizes itself for a production exaggerated of molecules. The decrease in the production of nitric oxide for the microvasculature's endothelial cells seems to play a central role in the pathogenesis of the disease. The results attained in 44 patients' study of series of cases of universe and inmunosupresor with cyclophosphamide according to therapeutic applied conduct shows of 31, with low incidence of the causes neoplastic in the death like secondary reactions and to treatment you went from motivation for the presentation of this work, that you reflected the possible relation between the systemic sclerosis and the neoplastic. It was concluded that the relation between auto-immunity and cancer can stem from an etiological common origin (genetic, hormonal, metabolic or environmental factors) or a mechanism of syndrome paraneoplastic. The disease is earthly of risk for neoplastic funny remark, the same way that the neoplastic can induce SS(AU)

Adverse drug reactions' reporting in a Mexican hospital.

OBJECTIVES: To summarize the procedure for reporting adverse drug reactions (ADRs) in a Mexican hospital, with the purpose of promoting and facilitating the report of ADRs by the heath team. We outline the relevance of pharmacists in performing these activities in Mexican hospitals. METHODS: A pharmacovigilance study was carried out following the establishment of the Pharmacovigilance Unit of a Mexican hospital on January 2014 through March 2019. KEY FINDINGS: There is an undernotification rate of ADRs, since only 137 ADRs were notified in a five-year period, mostly by biopharmaceutical chemists holding bachelor's degrees that were acting as pharmacists. CONCLUSIONS: To improve the safety of medications, it is necessary to improve ADR notifications in Mexico's health system. One important step in this direction is to establish a Pharmacy degree with training for promoting and performing ADR notifications.

GWAS to Identify Genetic Loci for Resistance to Yellow Rust in Wheat Pre-Breeding Lines Derived From Diverse Exotic Crosses.

Yellow rust (YR) or stripe rust, caused by Puccinia striformis f. sp tritici Eriks (Pst), is a major challenge to resistance breeding in wheat. A genome wide association study (GWAS) was performed using 22,415 single nucleotide polymorphism (SNP) markers and 591 haplotypes to identify genomic regions associated with resistance to YR in a subset panel of 419 pre-breeding lines (PBLs) developed at International Center for Maize and Wheat Improvement (CIMMYT). The 419 PBLs were derived from an initial set of 984 PBLs generated by a three-way crossing scheme (exotic/elite1//elite2) among 25 best elites and 244 exotics (synthetics, landraces) from CIMMYT's germplasm bank. For the study, 419 PBLs were characterized with 22,415 high-quality DArTseq-SNPs and phenotyped for severity of YR disease at five locations in Mexico. A population structure was evident in the panel with three distinct subpopulations, and a genome-wide linkage disequilibrium (LD) decay of 2.5 cM was obtained. Across all five locations, 14 SNPs and 7 haplotype blocks were significantly (P < 0.001) associated with the disease severity explaining 6.0 to 14.1% and 7.9 to 19.9% of variation, respectively. Based on average LD decay of 2.5 cM, identified 14 SNP-trait associations were delimited to seven quantitative trait loci in total. Seven SNPs were part of the two haplotype blocks on chromosome 2A identified in haplotypes-based GWAS. In silico analysis of the identified SNPs showed hits with interesting candidate genes, which are related to pathogenic process or known to regulate induction of genes related to pathogenesis such as those coding for glunolactone oxidase, quinate O-hydroxycinnamoyl transferase, or two-component histidine kinase. The two-component histidine kinase, for example, acts as a sensor in the perception of phytohormones ethylene and cytokinin. Ethylene plays a very important role in regulation of multiple metabolic processes of plants, including induction of defense mechanisms mediated by jasmonate. The SNPs linked to the promising genes identified in the study can be used for marker-assisted selection.

Axillobifemoral bypass for total abdominal occlusion secondary to Takayasu's arteritis: A case report.

INTRODUCTION: Takayasu's arteritis (TA) is a rare disease that mainly affects large arteries. Approximately 20% of TA patients will require surgical intervention secondary to arterial complications such as intermittent claudication, persistent hypertension refractory to treatment, and heart failure. PRESENTATION OF CASE: The case of a 22-year-old female with TA of five years of evolution is presented. The patient deteriorated clinically after five years of corticosteroid and immunosuppressant management requiring surgical intervention with an axillobifemoral bypass for a total abdominal occlusion. Onset, pre-surgical and post-surgical Doppler ultrasonography as well as abdominal angiotomographies document and corroborate the patient's clinical and hemodynamic improvement. DISCUSSION: Very limited literature exists regarding surgical interventions for TA patients. While most reported cases present an endovascular surgical management. Open surgical procedures have lower rates of restenosis than endovascular management. Although endovascular management is less invasive than extra-anatomical axillobifemoral bypass, the patient was not a candidate for endovascular stent graft placement due to the increased risk for vascular injury and subsequent perforation. Approximately a fifth of TA patients are candidates for surgical intervention over time. CONCLUSION: Vascular surgery in TA cases becomes an option when the patient does not improve clinically after administration of medical treatment. Although endovascular management has fewer complications, the rate of restenosis is higher. Patients at risk of restenosis and who have increased perioperative vascular risk can benefit from open surgical procedures. Surgical management should be tailored to the patient's needs.

Headache, Delirium or Encephalitis? A Case of Residual Mutism Secondary to Anti-NMDA Receptor Encephalitis.

Encephalitis is a heterogeneous syndrome that is diagnosed through clinical assessment and the assistance of laboratory, neuroimaging and electroencephalographic workup. Over the past 10 years, autoimmune encephalitis has been more frequently recognized; however, most reports come from highly specialized hospital settings. Anti-N-methyl-D-aspartate receptor (NDMAR) encephalitis has been associated with paraneoplastic encephalitis syndromes and was first recognized in 2005. We present the case of a 34-year-old male patient who debuted clinically with a headache associated with neuropsychiatric symptoms (i.e., visual and auditory hallucinations, anxiety, aggressiveness) and memory deficits, progressing to autonomic dysfunction (i.e., tachycardia and hypertension), seizures, and stupor with catatonic features. Initially, infectious, metabolic, and toxicological etiologies were excluded; followed by the assessment of immunological and paraneoplastic etiologies, yielding positive IgG levels for anti-NMDAR antibodies. The patient was treated successfully with systemic steroid therapy and therapeutic plasmapheresis, while mutism was the only sequela. Although large case series reporting on paraneoplastic and autoimmune anti-NMDAR encephalitis have been reported in the literature in recent years, this case is of particular importance due to the stepwise differential diagnosis and treatment management procedure that was used in a regional but not highly specialized hospital setting.

A Case of Acute Pemphigus Vulgaris Relapses Associated with Cocaine Use and Review of the Literature.

Pemphigus is a bullous autoimmune disease that affects the skin and mucous membranes. It is very difficult to establish the etiology and the triggering factors that influence reactivations in pemphigus vulgaris (PV). The case of a 33-year-old male with chronic history of intranasal cocaine consumption is presented in this report. We present the clinical case of the patient, followed for a total of 86 weeks, with ten relapses secondary to probable cocaine use. The patient was admitted to the emergency department after presenting polymorphic dermatosis characterized by blisters, vesicles, and excoriations extending from the oral cavity to the thorax, and to the inguinal and genital regions, affecting approximately 35 % of the body surface area with a score of 56 on the Pemphigus Skin Disorder Index. Skin biopsies were compatible with PV diagnosis. The patient had clinical improvement with a combination of methylprednisolone 500 mg intravenously (IV) and cyclophosphamide 500 mg IV every 15 days, along with prednisone 50 mg orally (PO) q24 h and mycophenolic acid 500 mg PO q6 h. Persistent cocaine use is highly likely to be the factor triggering lesion reactivation and responsible for the torpid evolution. We cannot definitively conclude whether the change from azathioprine to mycophenolic acid after the tenth relapse was the adjuvant medication responsible for the end of the consolidation phase and complete remission on therapy. This case study could potentially serve as a guide for management of patients who continuously persist with cocaine use, leading to a clinical picture refractory to multiple therapeutic schemes.

Alveolar hemorrhage associated with cocaine consumption.

Cocaine is an illegal drug; its abuse and toxicity are a public health problem due to its high morbidity and mortality. Cocaine can affect the cardiovascular, central nervous and respiratory systems. The case of a 42-year-old male without history of chronic or degenerative diseases, but previous cocaine consumption is presented in this report. The patient is admitted to the Emergency Department given that the clinical presentation included hemoptysis and dyspnea with mild to minimal activity, which evolved to orthopnea. Advanced airway management was required and supportive care at the Intensive Care Unit was provided. Imaging studies showed evidence compatible with alveolar hemorrhage diagnosis. In search of an autoimmune etiology, an antibody-screening panel was requested, reporting negative results for autoimmune disorders. The patient management was based on corticosteroid therapy and plasmapheresis to counter the persistent hemoptysis and hemoglobin serum level decline. The management strategy was based on the clinical suspicion of vasculitis and a torpid clinical evolution. Pulmonary sepsis ensued, resulting in patient's death. The necropsy report describes the primary cause of death as diffuse alveolar hemorrhage secondary to diffuse alveolar injury. This case report presents the detailed clinical, imagining and histopathological findings of a patient with alveolar hemorrhage secondary to cocaine consumption, as well as a review of the literature.

Invasive Pulmonary Adenocarcinoma with Lepidic Growth Pattern in a Pregnant Patient.

Among the differential diagnoses that should be considered in acute respiratory failure (ARF) are infectious processes, autoimmune diseases, interstitial pulmonary fibrosis, and pulmonary neoplasia. Timely diagnosis of lung neoplasia is complicated in the early stages. An opportune diagnosis, as well as the specific treatment, decrease mortality. ARF occurs 1 in 500 pregnancies and is most common during the postpartum period. Among the specific etiologies that cause ARF during pregnancy that must be considered are: (1) preeclampsia; (2) embolism of amniotic fluid; (3) peripartum cardiomyopathy; and (4) trophoblastic embolism. The case of a 36-year-old patient with a 33-week pregnancy and ARF is presented. The patient presented dyspnea while exerting moderate effort that progressed to orthopnea and type 1 respiratory insufficiency. Imaging studies showed bilateral alveolar infiltrates and predominantly right areas of consolidation. Blood cultures, a galactomannan assay and IgG antibodies against mycoplasma pneumoniae, were reported as negative. Autoimmune etiology was ruled out through an immunoassay. A percutaneous pulmonary biopsy was performed and an invasive pulmonary adenocarcinoma with lepidic growth pattern (i.e. lepidic pulmonary adenocarcinoma, LPA) result was reported. This etiology is rare and very difficult to recognize in acute respiratory failure cases. After infectious, autoimmune and interstitial lung fibrosis have been excluded the clinician must suspect of lung cancer in a patient with acute respiratory failure and chest imaging compatible with the presence of ground-glass nodular opacities, a solitary nodule or mass with bronchogram, and lung consolidation. In the presence of acute respiratory failure, the suspicion of pulmonary neoplasia in an adult of reproductive age must be timely. Failure to recognize this etiology can lead to fatal results.

Thrombocytosis as a predictor of distant recurrence in patients with rectal cancer.

BACKGROUND AND AIMS: Thrombocytosis is frequently observed in patients with malignancy. We undertook this study to determine the prognostic value of thrombocytosis in patients with rectal cancer. METHODS: We performed a retrospective study of patients undergoing low anterior resection for rectal cancer between January 2000 and March 2007. Preoperative platelet count was measured before surgery. Postoperative platelets were determined 1 month after surgery. Two-tailed p values <0.05 were considered statistically significant. RESULTS: One hundred sixty three patients with rectal cancer were included in the study. Preoperative platelet count >350,000 was found in 8% of patients. Postoperative platelet count >350,000 was found in 6% of patients. Distant metastases were found in 17 patients (10.4%). Significant variables in the multivariate analyses were preoperative platelets >350,000 (p = 0.001), postoperative platelets >350,000 (p = 0.002), carcinoembryonic antigen >13 ng/dL (p = 0.003). Patients with preoperative platelet count <350,000 showed a 5-year survival rate of 81%, whereas patients with platelet count >350,000 had a 25-month survival [95% confidence interval (CI): 20-26]; p <0.001. Patients with postoperative platelets <350,000 showed a 5-year survival rate of 80%, whereas patients with platelets >350,000 showed a 3-year survival rate of 37.5% (p <0.05). CONCLUSIONS: Pre- or postoperative platelet count >350,000 is associated with poor survival in patients with rectal cancer. The measurement of platelets is a clinical marker useful to define the prognosis for patients with rectal cancer.

Pacientes remitidos por el Programa de Detección de Cáncer Bucal: Facultad de Estomatología de La Habana: 1999-2006 / Patients referred by the Program for Detection of buccal cancer: Stomatology Faculty of La Habana, 1999-2006

Nos propusimos caracterizar los pacientes remitidos por el Programa de Detección de Cáncer Bucal (PDCB) a la Clínica de Patología Bucal de la Facultad de Estomatología de febrero de 1999 a julio de 2006. Se realizó un estudio transversal, descriptivo, observacional de los pacientes inscritos en el registro de remitidos por el PDCB a la Clínica de Patología de la Facultad de Estomatología de La Habana. Se estudiaron 1 008 pacientes, el diagnóstico presuntivo y definitivomás mayormente representado fue el de otra lesión, con 33,7 por ciento de presentación, seguido por la leucoplasia con 33,7 por ciento. La coincidencia entre el diagnóstico presuntivo y el definitivo fue de 69,0 por ciento, el carrillo estaba afectado en un 25,8 por ciento. El carcinoma epidermoide representó un 85,0 por ciento de las neoplasias malignas diagnosticadas. No hubo diferencias entre los sexos de los pacientes remitidos y el rango de edades más afectado fue el de 34 a 59 años de edad. La mitad de los pacientes remitidos tenían hábito de fumar, mucho más elevado en los pacientes con leucoplasia y neoplasias malignas. Las localizaciones anatómicas más afectadas por las lesiones motivo de remisión fueron carrillo, encía y paladar. El carcinoma epidermoide grado I y la etapa clínica I mostraron los mayores porcentajes(AU)

The aim of present paper was to characterize the patients referred by the Program for Detection of Buccal Cancer (PDBC) to Clinic of Buccal Pathology of the Stomatology Faculty from February, 1999 to July, 2006. An observational, descriptive and cross-sectional study was conducted in patients inscribed in Referred Registry by PDBC to Clinic of Pathology from the Stomatology Faculty of La Habana. A total of 1 008 patients were studied, the more numerous presumptive diagnosis and the definitive diagnosis of other lesion with 33,7 percent followed by leucopenia with 33,7 percent, coincidence between the presumptive diagnosis and the definitive one was of 69,0 percent, the cheek was involved in the 25,9 percent. Epidermoid carcinoma accounted for the 85,0 percent and the diagnosed malignant neoplasm. There were not differences among sexes of referred patients and the more involved age rank was that from 34 to 59 years. The half of referred patients had smoking being higher in patients presenting with leukoplakia and malignant neoplasms. The anatomical locations more involved by the lesions were cheeks, gingiva and palate. The Grade I epidermoid carcinoma and the grade I clinical stage showed the higher percentages. Are needed further studies allowing to emphasize the success of PDBC and to correct the deficiencies preventing to fulfill appropriately the objectives(AU)

La embarazada y su atención estomatológica integral como grupo priorizado: área de salud Moncada / The pregnant and its integral Odontology care as a priority group: Moncada health area

Se plantea con frecuencia en el argot popular que cada embarazo hace perder un diente y aunque todos los profesionales de la estomatología consideramos esta frase falsa, existen muchos factores que en la embarazada influyen desfavorablemente que la pueden hacer susceptible a contraer caries o periodontopatías. Se pretende con este trabajo identificar los aspectos más importantes a señalar durante esta etapa en cuanto manifestaciones clínicas, factores desfavorables desencadenantes de enfermedades bucales y de la organización de los servicios mediante exàmenes clínicos y encuestas realizadas a un grupo de embarazadas que reciben atención en la Facultad de Estomatología Raúl Gonzàlez Sànchez. Conclusiones de interés se obtuvieron al encontrar que existieron algunas dificultades en la atención estomatológica a las embarazadas que estuvieron dadas fundamentalmente por problemas inherentes a las pacientes, como los cuadros eméticos frecuentes y la ingestión de alimentos azucarados los cuales actuaron en detrimento de la salud bucal de las mismas. La gingivitis resultó ser la afección bucal mas frecuente en nuestro estudio(AU)

In argot frequently it is posed that in each pregnancy a tooth is lost, and although all Odontology professionals consider that this phrase if wrong, there are many factors that in pregnant influenced in a unfavorable way being sensitive to has caries or periodontal disease, which include them in a priority group of our health area, the aim of present paper is to identify the more important features to point out during this stage as regards the clinical manifestations, unfavorable factors triggering oral diseases and the services organization by clinical examinations and surveys conducted in a group of pregnant receiving care in Raúl Gonzàlez Sànchez Odontology Faculty. We conclude that there are come difficulties during the stomatologic care to pregnant caused mainly by inherent problems acted to the detriment of its hygiene health, the gingivitis was the oral affection more found in study group(AU)

Xerostomía y uso de medicamentos en adultos / Xerostomia and the use of drugs in adults

OBJETIVO: determinar la prevalencia de xerostomía en relación con el uso de medicamentos en los adultos de 20 años y más del Consultorio Médico 64-02 de Guanabacoa, de julio a diciembre del año 2007. MÉTODOS: se realizó un estudio descriptivo y se utilizó muestreo bietápico. La presencia de xerostomía, basada en definición utilizada por otros autores, se determinó con 3 preguntas, además: edad, sexo, uso, cantidad y tipos de medicamentos, según cuestionario. RESULTADOS: se procesó la información en Excel, utilizando el porcentaje para resumirla. Los resultados se presentan en tablas. Se relacionaron las variables, con la X² y diferencia de proporciones (p<0,05), con el programa Epidat. De 511 individuos estudiados, 176 (34,4 por ciento) percibieron xerostomía. El sexo femenino fue el más afectado, se incrementa con la edad, fue mayor en el grupo de 60 años y más. CONCLUSIONES: los medicamentos más utilizados fueron: antihipertensivos y antiasmáticos. Todos los que usaron hipoglicemiantes y antialérgicos, percibieron xerostomia, y se incrementó según el número de medicamentos usados(AU)

OBJECTIVE: to determine the prevalence of xerostomia in connection with the use of drugs in adults aged 20 and over at the Family Physician's office 64-02 in Guanabacoa from July to December 2007. METHODS: a descriptive study was undertaken and a bistage sampling was used. The presence of xerostomia based on the definition used by other authors was determined by 3 questions in addition to age, sex, use, amount and type of drugs according to the questionnaire. RESULTS: the information was processed in Excel, using percentage to resume it. The results were presented in tables. The variables were related to X2 and the difference of proportions (p<0.05) by using the Epidat program. Of 511 studied individuals, 176 (34.4 percent) perceived xerostomia. Females were the most affected. It increases with age, and the group aged 60 and over was the most affected. CONCLUSIONS: the most used drugs were the antihypertensive and antiasthma drugs. All those who took glycemia-lowering and antiallergic drugs perceived xerostomia and it rose according to the number of drugs used(AU)

Consecuencias de la preparación previa de pacientes adultos en la determinación de colesterol total y triglicéridos / Consequence of previous preparation of adult patients in the determination of total cholesterol and triglicerid levels

Objetivos: Establecer la relación de la concentración de colesterol total y triglicéridos en adultos sometidos o no al ayuno. Analizar y comparar los distintos niveles de colesterol total y triglicéridos registrados en el estudio en función a la preparación previa de los pacientes adultos. Estudio observacional prospectivo transverso, llevado a cabo en el mes de marzo de 2007 con personas adultas entre 20 a 60 años de edad provenientes del Sub Barrio Carlos Antonio López del Barrio Sajonia de Asunción. Participaron del estudio 148 pacientes, 62 hombres (42%) y 86 mujeres (58%). Se ha observado una reducción en los niveles de colesterol total y triglicéridos en los pacientes con preparación previa. La reducción varía en los porcentajes siguientes: colesterol total de 0 a 60% triglicéridos de 0 a 70%. La mayor diferencia de variación porcentual en la concentración de colesterol total ha sido en los pacientes de 20 a 30 años con hasta 10% de reducción. En los triglicéridos la mayor reducción se da en los pacientes de 20 a 30 años con reducción de hasta el 20%.

Citometría de fuujo: vínculo entre la investigación básica y la aplicación clínica

La citometría de flujo es un método analítico que permite la medición rápida de ciertas características físicas y químicas de células o partículas suspendidas en líquido que producen una señal de forma individual al interferir con una fuente de luz. Una de las características analíticas más importantes de los citómetros de flujo es su capacidad de medir múltiples parámetros celulares, como el tamaño, forma y complejidad y, por supuesto, cualquier componente celular o función que pueda ser marcada con un fluorocromo. Las aplicaciones más relevantes de la citometría de flujo en la práctica médica se relacionan con la hematología e inmunología clínicas, midiendo parámetros como número y clasificación de células sanguíneas. Esta técnica es empleada también en el conteo de subpoblaciones de linfocitos en pacientes con el virus de la inmunodeficiencia humana, así como la caracterización de leucemias agudas y síndromes linfoproliferativos crónicos, entre otros padecimientos. En los últimos 20 años, el análisis de enfermedades pulmonares de origen inmunológico por citometría de flujo ha jugado un papel importante en el entendimiento y diagnóstico de enfermedades como sarcoidosis, neumonía eosinofílica o neumonitis por hipersensibilidad. Las aplicaciones de la citometría de flujo son numerosas, lo cual ha permitido el empleo de estos instrumentos de manera amplia en los campos, tanto de la investigación biológica como médica. Esta revisión brinda un panorama general de los principios básicos de la citometría de flujo y la muestra como una herramienta reproducible y aplicable a una gran variedad de campos médicos, así como su empleo en el campo de las enfermedades pulmonares.

Flow cytometry is an analytical method that allows the rapid measurement of certain physical and chemical characteristics of cells or particles suspended in liquid and produce signals when they pass individually through a beam of light. An important analytical feature of flow cytometers is their ability to measure multiple cellular parameters such as cell size, shape and internal complexity and, of course any cell component or function that can be detected by a fluorescent dye. The most prominent uses of flow cytometry in medical practice are in the related fields of laboratory hematology and clinical immunology, for a variety of tasks involving blood cell counting and classification. This technique is also used for counting lymphocyte subpopulations in patients with HIV, characterization of acute leukemias and chronic lymphomas between other diseases. Over the last 20 years, analysis of immunologica lung diseases by flow cytometry has played a major role in the understanding and as tool of diagnosis, such as sarcoidosis, eosinophilic pneumonia or hypersensitivity pneumonitis. So the applications of flow cytometry are numerous, and this has lead to the widespread use of this instruments in biological research and medical fields. Overall this review shows a brief overview of basic principles of and shows this as a reproducible tool applicable to a wide range of medical approaches as well as its use in lung diseases field.

[lymphatic Mapping and Sentinel Lymph Node Biopsy in patients with Breast Cancer ]. / Mapeo linfático y biopsia del ganglio centinela en pacientes con cáncer de mama.

UNLABELLED: Axillary lymphadenectomy is the standard of care in breast cancer patients. Lymphatic mapping has arisen as an alternative offering less morbidity. OBJECTIVE: To determine the success rate of subareolar blue dye injection (SM) in sentinel node (SN) biopsy and its value in axillary staging. METHODS: 62 stages I and II breast cancer patients without palpable axillary nodes received subareolar injection of blue dye; an intraoperative study of the SN was carried out. Axillary lymphadenectomy was carried out in all patients. Sensitivity, specificity, positive predictive value, and negative predictive value were measured. RESULTS: In 58/62 patients (93.5%), SN was identified; 19/58(32%) patients had nodal metastases, 18 were identified in intraoperative study, and only one false negative; 12/18 patients showed metastasis in other axillary nodes (66%), in 6 (27%) the only metastasis site was SN. Sensitivity/specificity of the SN was 92.8 and 88.6%, respectively. Positive predictive value is 72.2% and negative predictive value is 97.5% CONCLUSION: SAI of blue dye allows identification of SN in 93.5%; with high sensitivity. SN negative predictive value is 97.5% in this study.