There are also no obvious clinical symptoms in the early stage of suspicious cell carcinoma, which is a type of renal cell carcinoma with generally good prognosis and mainly originates from the cortical part of the renal collecting duct. The most common symptoms are consistent with those of kidney cancer, which may include hematuria, pain, and masses. Hematuria may be intermittent painless hematuria, indicating that the tumor invades the renal pelvis and calyces; pain is mainly dull pain or vague pain in the lumbar region, and the enlargement of the tumor may lead to large tension of the renal envelope or invade the lumbar masseter muscle, which may cause pain. The blood clot may also cause renal colic when discharged through ureter. The mass mainly means that the tumor is relatively large and the mass can be felt in the abdomen.