The india ink line at mass-kidney interface was observed in all 19 tumors of the 16 cases of AML,while it did not occur in any of 22 cases of renal carcinomas.

• 16例肾AML的19个肿瘤与肾实质交界面出现黑墨汁线,而22例肾癌与肾实质交界面未出现黑墨汁线。