[A case of renal clear-cell carcinoma simulating a renal cyst. Diagnostic and therapeutic considerations].

The authors describe one case of renal cyst with radiological evidence of psammoma-like calcifications. Explored surgically, and even though the liquid content was clear, this cyst revealed the presence of a light-cell carcinoma at the bottom of the cavity. One the strength of this finding, the authors recommend exploratory lumbotomy and opening of the cyst wall in such cases.