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在２５例３０例次膀胱移行细胞癌复发过程的观察中，发现３例次（１０％）由移行细胞癌转变为鳞癌或腺癌，７例次（２３．３％）分级增高，１１例次（３６．７％）分期增加，２０例次（６６．７％）由单发转变为多发瘤，异位复发２９例次，其中远离原肿瘤部位的异位复发２４例次（８０％），以颈部为最常见。复发以术后６～１２月最多见，半数见于术后６～１８月之间，影响术后无瘤期长短的主要因素是肿瘤病理分级、大小及单发或多发。
In 25 patients with bladder transitional cell carcinoma of 30 cases observed in the recurrence of the process, found in 3 cases (10%) from transitional cell carcinoma into squamous cell carcinoma or adenocarcinoma, 7 cases (23.3%) were graded, 11 cases (36.7%) stage increased, 20 cases (66.7%) changed from single to multiple tumor, ectopic recurrence in 29 cases, of which ectopic recurrence far away from the original tumor sites in 24 cases (80%), To the neck as the most common. Recurrence was most common in 6 to 12 months after operation, and half of cases were found between 6 and 18 months after operation. The main factors influencing the length of tumor-free period were pathological grade, size and single or multiple tumor recurrence.