[Asymptomatic renal cell carcinoma and small renal cell carcinoma].

Of 151 patients with renal cell carcinoma 12 were asymptomatic and 13 were small in size. The patients with asymptomatic renal cell carcinoma were incidentally discovered by B ultrasonography or IVP. Most of asymptomatic renal cell carcinomas were of lower stage than suspected, but a few were advanced. The patients with small renal cell carcinoma, which were all classified into stage One, Simple hematuria or pain is not only the manifestation of advanced carcinoma but also early stage. It is termed early diagnosis that the renal cell carcinoma without capsule invasion and metastases is detected. B ultrasonography should be the first choice for early diagnosis of renal cell carcinoma.