Nine out of 13 renal cell carcinomas were correctly detected by examining cells exfoliates into urine. Most lesions of these cases, however, had not been demonstrated by other diagnostic procedures. Thus, it is emphasized that cytodiagnostic method is able to detect such cancers of kidney clinically at occult state.
Cellular morphology of the cancer was shown, paticularly described in respects to the typical cellular feature available for distingushing them from the other malignant tumors. Clinicopathologic problems in diagnosis of the renal cell cancer were also discussed, with citing case studies.