Incidental renal cell carcinoma: analysis of 109 cases / 中华外科杂志

ABSTRACT

<p><b>OBJECTIVE</b>To study the characteristics, diagnosis,treatment and prognosis of incidental renal cell carcinoma(RCC).</p><p><b>METHODS</b>109 cases of incidental RCC treated in 20 years were analyzed retrospectively and compared with 247 cases of non-incidental RCC.</p><p><b>RESULTS</b>The age, sex and side between incidental RCC and non-incidental RCC were not significant (P > 0.05). Compared to the non-incidental RCC,the diameter of incidental RCC [(4.1 +/- 1.7) cm] was smaller and its stage was lower (P < 0.01). Ultrasonography and CT can improve the detection rate of incidental RCC significantly, and operation is more effective for incidental RCC than for non-incidental RCC (P < 0.01). The 3 and 5 year cancer specific survival rates in patients with incidental RCC were higher than those of non-incidental RCC(P < 0.01). The detection rate of incidental RCC was higher from 1990 to 1999 (39.3%) than from 1980 to 1989 (15.6%) (P < 0.01).</p><p><b>CONCLUSIONS</b>Incidental RCC is not another type of RCC, but a developing stage of RCC without appearance of a symptoms. Ultrasonography and CT are important to diagnose incidental RCC. Low pathological stage, small size, early diagnosis, and radical nephrectomy indicate better prognosis of incidental RCC.</p>