Management for Patients with De Novo or Recurrent Tumors in the Residual Kidney after Surgery for Nonfamilial Bilateral Renal Cell Carcinoma

Table 1

Patients, their characteristics at the initial visit, occurrence pattern of renal tumors, and surgical approaches.

Patient number	Age (y.o.)	Sex	Leading symptom	Stage	Occurrence pattern	Nephrectomy
Case1	48	male	hematuria	T1b, T1a	synchronous	radical and partial
Case2	54	female	pyrexia	T2, T1a	metachronous	radical and partial
Case3	61	male	none	T1a, T1a	metachronous	partial and partial
Case4	62	male	none	T1b, T1a	metachronous	radical and partial
Case5	42	male	none	T1a, T1a	synchronous	partial and partial

All the patients had N0M0 disease at the initial visit or when the metachronous tumor emerged in the contralateral kidney. All the tumors were pathologically diagnosed as conventional renal cell carcinoma (RCC) G2 or G2-dominant, and surgical margins in patients receiving partial nephrectomy were negative for malignant tissue.