[Extramedullary hematopoiesis, a simulator difficult to diagnose]. / Hematopoyesis extramedular, un simulador de difícil diagnóstico.

The extramodular hematopoiesis is the result of the bone marrow sever chronical hypofunction, being the genitourinary affection very unusual. We are presenting a singular case by its own clinicopathology consequences and exceptional incidence in context of a upper tract urothelial tumor.

Hematopoyesis extramedular, un simulador de difícil prognóstico / Extramedular hematopoyesis, a difficult diagnosis simulator

La hematopoyesis extramedular es el resultado de la hipofunción severa crónica de la médula ósea, siendo muy infrecuente la presentación en órganos del aparato génito-urinario. Presentamos un caso importante por sus implicaciones clínicopatológicas y rareza en el contexto de un tumor de urotelio alto superficial (AU)

Tumor renal neuroendocrino. Un caso de rara presentación. Revisión de la literatura / Neuroendocrine renal tumor, a case of exceptional presentation. Review of the literature

Los tumores renales neuroendocrinos son de presentación extremadamente rara. Presentamos un caso clínico y revisamos la literatura sobre esta patología (AU)

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[Neuroendocrine renal tumor. An unusual case. Review of the literature]. / Tumor renal neuroendocrino. Un caso de rara presentación. Revisión de la literatura.

The neuroendocrine renal tumors are of extremely strange presentation. We present a review of the literature published on this pathology.

Prognostic factors of thymomas.

Thymomas are uncommon tumours. This study analyses the prognostic value of certain clinical variables and of two different histological classifications. Thirty cases were analysed; 24 were women and six men, with a mean age of 50 years (range 22-69). The pre-operative study included: clinical data (Masaoka's and Osserman's clinical classification); chest radiography; and computed axial tomography. Surgery was divided into three categories: total tumour resection, partial resection and biopsy alone. For the pathological study we followed Salyer-Eggleston and Marino-Müller classifications. Follow-up averaged 5.5 years (range: 2-11). As a statistical method we used Kaplan-Meier's survival curves and Cox's regression model. Eleven of the patients had associated myasthenia gravis, this being the most common clinical type. Age, sex, association with myasthenia gravis, surgical technique and Salyer-Eggleston's classification showed no prognostic value; conversely, clinical staging and Marino-Müller's classification had a high prognostic value. The first treatment that should be considered is surgery, with an attempt to perform total tumour resection. Myasthenia gravis did not modify the prognosis of the disease. The factors of greatest prognostic significance were clinical staging and Marino-Müller's histological classification.