RT Journal Article SR Electronic T1 Increase in Circulating Tumor Cells in Invasive Bladder Cancer After Transurethral Resection of Bladder Tumor JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 4299 OP 4307 DO 10.21873/anticanres.14432 VO 40 IS 8 A1 NOBUHIRO HAGA A1 KAZUNA TSUBOUCHI A1 HIROKO MARUTA A1 TOMOYUKI KOGUCHI A1 SEIJI HOSHI A1 SOICHIRO OGAWA A1 HIDENORI AKAIHATA A1 JUNYA HATA A1 YOSHIYUKI KOJIMA YR 2020 UL http://ar.iiarjournals.org/content/40/8/4299.abstract AB Background/Aim: The present research was performed to clarify the differences in circulating tumor cells (CTCs) counts between non-muscle-invasive (NMIBC) and muscle-invasive (MIBC) bladder cancer following transurethral resection of bladder tumor (TURBT). Patients and Methods: The cohort in the prospective research was categorized into the NMIBC (n=13) and the MIBC (n=13) groups. The pre- and postoperative number of CTCs was counted by the FISHMAN-R® system. Results: The difference of the number of preoperative CTCs between the NMIBC group (2.3±2.6) and MIBC group (4.8±4.2) did not reach statistical significance (p=0.08). However, there was a significantly greater increase in postoperative CTC count in the MIBC group (14.6±14.6) than in the NMIBC group (3.1±2.1, p=0.01). Conclusion: After TURBT, more carcinoma cells can be discharged from the bladder in the MIBC. Excessive deep layer resection and excessive pressure of the infusion fluid during TURBT should be avoided in patients with MIBC.