Assessment of the necessary excision of normal parenchyma tissue in nephron-sparing surgery for renal cell carcinoma / 中华泌尿外科杂志

ABSTRACT

Objective To assess the necessary excision of normal parenchyma tissue in nephron sparing surgery for renal cell carcinoma. Methods 102 specimens from radical nephrectomy for RCC were step sectioned at 3 mm intervals and examined.The tumor and field 20 mm beyond pseudocapsule were continuously sectioned and examined for completeness of pseudocapsule,the presence of micro multifocal carcinoma and for vascular and parenchyma invasion beyond pseudocapsule. Results 49 (48.0%) of the 102 specimens were void of intact pseudocapsule.The presence of extra pseudocapsule cancerous lesions was within 0～8 mm [(1.2?1.9) mm] beyone the capsule,with 30.4% of them within the field of 1～8 mm.with the statistic method of one side analysis of frequency,the percentile value of P97.5 and P100.0 was 7.4 and 8.0 mm respectively. Conclusions These data denote that when nephron sparing surgery is done for renal cell carcinoma,at least 10 mm of normal parenchyma tissue beyond the pseudocapsule should be excised with the tumor.The nucleation techniquc should not be encouraged.