[Complicated hydatid cyst mimicking renal tumor. Diagnosis with fine needle aspiration puncture]. / Quiste hidatídico complicado remedando un tumor renal. Diagnóstico mediante punción aspiración con aguja fina (PAAF).

We report a complicated case of hydatid cyst mimicking a renal tumor, diagnosed by fine needle aspiration cytology. The cytological features are described and the diagnostic value of fine needle aspiration biopsy is underscored.

[Amyloid colitis]. / Colitis amiloidea.

A patient is reported who had urolithiasis and pyonephrosis of the right kidney. In the terminal phase of his disease he developed chronic diarrhea and hematochezia. Sigmoidoscopy showed changes in the colo-rectal mucosa compatible with ulcerative colitis with moderate activity. Histology demonstrated large amyloid deposits of the AA type in the lamina propia around the vessels and with atrophy and ulceration if the epithelium.