El carcinoma renal de los conductos colectores es una variante poco frecuente de carcinoma renal. Típicamente su comportamiento es más agresivo que el de otras formas de carcinoma de células renales, siendo habitualmente diagnosticado en estadios avanzados. Presentamos un caso de carcinoma renal de los conductos colectores de bajo grado. Un varón de 57 años fue admitido en nuestro hospital con clínica de cólico nefrítico. En el TAC se observó una masa en el riñón derecho y se le realizó una nefrectomía parcial. El diagnóstico histológico fue carcinoma renal de los conductos colectores de bajo grado. Es una entidad nueva, de comportamiento desconocido y aparentemente menos agresivo que el carcinoma de los conductos colectores clásico. Describimos las características clínicas, radiológicas, histológicas e inmunohistoquímicas de este tumor y revisamos la literatura. PALABRAS CLAVES: Carcinoma de los conductos colectores. Bellini. Bajo grado. Riñón.
Increased thickness of left ventricular walls is the predominant characteristic and one of the diagnostic criteria of hypertrophic cardiomyopathy (HCM). This case illustrates an uncommon but important finding of isolated hypertrophy of the papillary muscles (PMs), observed in a young woman in whom an abnormal electrocardiogram was initially detected. During the investigation isolated PM hypertrophy was identified. The structural characteristics of the PMs have received scant attention in this setting and there is little information in the literature on this entity, whose real prevalence and clinical significance remain to be determined. The available information relates solitary PM hypertrophy with an early form or a different pattern of HCM. In this case PM hypertrophy was only detected due to the finding of an abnormal electrocardiogram, which prompted further diagnostic tests and a search for possible etiologies.
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