[Localization diagnosis of carcinoma in situ of bladder cancer by pirarubicin: preliminary clinical experience].

Objective To investigate whether the location of carcinoma in situ (CIS) of bladder cancer could be macroscopically ascertained by instilling pirarubicin (THP) into urinary bladder. Methods 50 mg of THP was dissolved into 50 ml of 5% glucose solution. And the resulting solution was instilled into urinary bladder. After 15 min, the urinary bladder was observed by a cystoscopy. The study group consisted of 51 patients with bladder cancer (37 males, 14 females) and 14 patients with hematuria (8 males, 6 females) , treated at our hospital from December 2007 to June 2008. Results The THP uptake was seen in 67 flat (non-tumorous) areas of bladder mucosa in 37 patients with bladder cancer. Of these, 11 lesions in 7 patients were confirmed to be CIS. The THP uptake was found in 2 flat (non-tumorous) areas of bladder mucosa in 14 patients with hematuria, 1 lesion in 1 patient was confirmed to be CIS. The sensitivity and specificity of THP uptake by CIS were 92. 3% (12/13) and 86. 7% (371/428) respectively. Conclusion This practical method may be employed to ascertain easily the macroscopic location of CIS of bladder caner. Key words: Bladder neoplasms;  Carcinoma in situ;  Diagnosis;  Pirarubicin