Introduction: Although partial cystectomy has been performed by laparoscopy in patients with benign disease, there have only been a few reports regarding the laparoscopic partial resection of urinary bladder adherent colorectal cancer. This study was conducted to evaluate the short-term surgical outcomes of laparoscopic partial resection of urinary bladder adherent colorectal cancer. Case presentation: Between April 2014 and February 2017, six patients with colorectal cancers that were adherent to the urinary bladder underwent laparoscopic colorectal cancer resection combined with partial cystectomy. Their surgical outcomes were reviewed retrospectively. The primary colorectal cancer was located in the sigmoid colon in 5 patients and the upper rectum in one. None of the patients required conversion to open surgery. The median duration of surgery was 411 minutes, and the median amount of intraoperative blood loss was 284 ml. In the patients with sigmoid colon cancer, the bladder was primarily closed under direct visualization via the small lower abdominal incision used to remove the tumor. In the patient with upper rectal cancer, the bladder was primarily closed laparoscopically. None of the patients demonstrated urinary leakage on retrograde cystography, or anastomotic leakage, and there were no cases of perioperative mortality or morbidity. None of the patients developed recurrence of cancer at the median follow up of 21 months. Conclusion: Laparoscopic partial resection of urinary bladder adherent colorectal cancer produces good short-term outcomes without increasing morbidity. Performing bladder closure under direct visualization via a small lower abdominal incision might be useful in selected patients.

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