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1.
Actas urol. esp ; 41(8): 529-534, oct. 2017. ilus, tab
Article in Spanish | IBECS | ID: ibc-167167

ABSTRACT

Objetivo: El carcinoma neuroendocrino de célula pequeña de próstata es una neoplasia infrecuente que supone el 0,5-1% de todas las neoplasias prostáticas. La mediana de supervivencia cáncer-específica de los pacientes con carcinoma neuroendocrino de célula pequeña de próstata es de 19 meses, y el 60,5% de los pacientes presentan enfermedad metastásica. Los factores de transcripción de desarrollo neural son moléculas implicadas en la organogénesis del sistema nervioso central y de precursores neuroendocrinos de diversos tejidos, que incluyen la glándula suprarrenal, el tiroides, el pulmón y la próstata, entre otros órganos. Material y métodos: Presentamos 3 casos de esta infrecuente entidad, aplicando los nuevos criterios de la OMS. Realizamos estudios mediante tinción de H-E y analizamos la expresión de los factores de transcripción de desarrollo neurales Achaete-scute homolog like 1, Thyroid transcription factor 1 y los factores de transcripción clase iii/iv POU, como nueva línea de investigación en la carcinogénesis de los tumores neuroendocrinos de próstata. Resultados: En el caso 1 no se observó inmunoexpresión para TTF1. Los casos 2 y 3 presentaron inmunotinción positiva para ASCL1, e inmunotinción negativa en el caso 1. La inmunotinción para BRN2 fue negativa en el caso 1 y positiva en los casos 2 y 3. Conclusión: Actualmente, la OMS no reconoce ningún marcador molecular ni genético con valor pronóstico. ASCL-1 está relacionado con las vías de señalización NOTCH y WNT. ASCL-1, TTF1 y BRN2 podrían usarse para el diagnóstico precoz y como factor pronóstico y diana terapéutica


Objective: Prostatic small-cell neuroendocrine carcinoma is an uncommon malignancy that constitutes 0.5-1% of all prostate malignancies. The median cancer-specific survival of patients with prostatic small-cell neuroendocrine carcinoma is 19 months, and 60.5% of the patients have metastatic disease. Neural development transcription factors are molecules involved in the organogenesis of the central nervous system and of neuroendocrine precursors of various tissues, including the suprarenal gland, thyroid glands, lungs and prostate. Material and methods: We present 3 cases of this uncommon condition, applying the new World Health Organisation criteria. We conducted studies through haematoxylin and eosin staining and analysed the expression of the neural development transcription factors achaete-scute homolog like 1, thyroid transcription factor 1 and the class III/IV POU transcription factors, as a new research line in the carcinogenesis of prostatic neuroendocrine tumours. Results: In case 1, there was no TTF1 immunoexpression. Cases 2 and 3 had positive immunostaining for ASCL1, and Case 1 had negative immunostaining. BRN2 immunostaining was negative in case 1 and positive in cases 2 and 3. Conclusion: The World Health Organisation does not recognise any molecular or genetic marker with prognostic value. ASCL-1 is related to the NOTCH and WNT signalling pathways. ASCL-1, TTF1 and BRN2 could be used for early diagnosis and as prognostic factors and therapeutic targets


Subject(s)
Humans , Immunohistochemistry/methods , Neuroendocrine Tumors/pathology , Prostatic Neoplasms/pathology , Genetic Markers , Carcinoma, Small Cell/pathology , Transcription Factor 3/analysis , Achaete-Scute Complex Genome Region/genetics , Receptors, Notch/analysis , Signal Transduction
2.
Actas Urol Esp ; 41(8): 529-534, 2017 Oct.
Article in English, Spanish | MEDLINE | ID: mdl-28285791

ABSTRACT

OBJECTIVE: Prostatic small-cell neuroendocrine carcinoma is an uncommon malignancy that constitutes 0.5-1% of all prostate malignancies. The median cancer-specific survival of patients with prostatic small-cell neuroendocrine carcinoma is 19 months, and 60.5% of the patients have metastatic disease. Neural development transcription factors are molecules involved in the organogenesis of the central nervous system and of neuroendocrine precursors of various tissues, including the suprarenal gland, thyroid glands, lungs and prostate. MATERIAL AND METHODS: We present 3 cases of this uncommon condition, applying the new World Health Organisation criteria. We conducted studies through haematoxylin and eosin staining and analysed the expression of the neural development transcription factors achaete-scute homolog like 1, thyroid transcription factor 1 and the class III/IV POU transcription factors, as a new research line in the carcinogenesis of prostatic neuroendocrine tumours. RESULTS: In case 1, there was no TTF1 immunoexpression. Cases 2 and 3 had positive immunostaining for ASCL1, and Case 1 had negative immunostaining. BRN2 immunostaining was negative in case 1 and positive in cases 2 and 3. CONCLUSION: The World Health Organisation does not recognise any molecular or genetic marker with prognostic value. ASCL-1 is related to the NOTCH and WNT signalling pathways. ASCL-1, TTF1 and BRN2 could be used for early diagnosis and as prognostic factors and therapeutic targets.


Subject(s)
Basic Helix-Loop-Helix Transcription Factors/analysis , Carcinoma, Neuroendocrine/chemistry , Carcinoma, Small Cell/chemistry , DNA-Binding Proteins/analysis , Homeodomain Proteins/analysis , Neoplasm Proteins/analysis , POU Domain Factors/analysis , Prostatic Neoplasms/chemistry , Transcription Factors/analysis , Aged , Biomarkers, Tumor , Carcinoma, Neuroendocrine/genetics , Carcinoma, Small Cell/genetics , Cell Transformation, Neoplastic/genetics , Eosine Yellowish-(YS) , Hematoxylin , Humans , Immunohistochemistry , Male , Middle Aged , Prognosis , Prostatic Neoplasms/genetics , Staining and Labeling , Synaptophysin/analysis , Transcription, Genetic
3.
Rev. patol. respir ; 11(1): 29-30, ene.-mar. 2008. ilus
Article in Es | IBECS | ID: ibc-65904

ABSTRACT

Entre los subtipos de carcinomas indiferenciados de células grandes de pulmón se encuentra el linfoepitelioma pulmonar primario. Es una variedad de neoplasia pulmonar muy infrecuente. Su diagnóstico obliga de forma sistemática a descartarque se trate de una metástasis de un tumor primario nasofaríngeo. La cirugía es el tratamiento de elección. Aún no están totalmente establecidas las indicaciones y los regímenes ideales de quimioterapia y radioterapia. Dar a conocer la experiencia de los casos diagnosticados ayudará a conocer más sobre el comportamiento de estos tumores


Lymphoepithelioma-like carcinoma of the lung (LELC) is considered a subtype of undifferentiated large cell carcinoma. It´s a rare tumor. It is imperative that a nasopharynx origin is actively excluded in all cases. The choice treatment is surgical resection. Experience with systematic chemotherapy or radiotherapy in the treatment of LELC is limited


Subject(s)
Humans , Male , Aged , Carcinoma, Non-Small-Cell Lung/pathology , Lung Neoplasms/pathology , Pneumonectomy
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