a young man with gradually enlarging kidneys and radiographic findings strongly suggestive of polycystic disease was found on autopsy to have massive bilateral renal enlargement due to innumerable multifocal tumors , arising in atypical renal tubular epithelium , whose microscopic appearance ranged from that of so-called renal adenoma to that of low-grade renal cell carcinoma .
C0022646
renal
C0334684
renal adenoma