Summary of experience with patterning cropped and shaped mesh repair for perineal hernia after abdominoperineal excision in rectal cancer / 中华外科杂志

Objective: To examine the patterning cropped and shaped mesh repair for perineal hernia after abdominoperineal excision (APE) in rectal cancer. Methods: The clinical data of 8 patients with perineal hernia after APE who accepted surgical treatment in the Department of Hepatopancreatobiliary and Hernia Surgery, the First Affiliated Hospital of Fujian Medical University from March 2017 to December 2022 were retrospectively reviewed. There were 3 males and 5 females, aged (67.6±7.2) years (range: 56 to 76 years). Eight patients developed a perineal mass at (11.3±2.9) months (range: 5 to 13 months) after APE. After surgical separation of adhesion and exposing the pelvic floor defect, a 15 cm×20 cm anti-adhesion mesh was fashioned as a three-dimensional pocket shape to fit the pelvic defect, then fixed to the promontory or sacrum and sutured to the pelvic sidewalls and the anterior peritoneum, while two side slender slings were tailored in front of the mesh and fixed on the pectineal ligament. Results: The repair of their perineal hernias went well, with an operating time of (240.6±48.8) minutes (range: 155 to 300 minutes). Five patients underwent laparotomy, 3 patients tried laparoscopic surgery first and then transferred to laparotomy combined with the perineal approach. Intraoperative bowel injury was observed in 3 patients. All patients did not have an intestinal fistula, bleeding occurred. No reoperation was performed and their preoperative symptoms improved significantly. The postoperative hospital stay was (13.5±2.9) days (range: 7 to 17 days) and two patients had postoperative ileus, which improved after conservative treatment. Two patients had a postoperative perineal hernia sac effusion, one of them underwent placement of a tube to puncture the hernia sac effusion due to infection, and continued irrigation and drainage. The postoperative follow-up was (34.8±14.0) months (range: 13 to 48 months), and 1 patient developed recurrence in the seventh postoperative month, no further surgery was performed. Conclusions: Surgical repair of the perineal hernia after APE can be preferred transabdominal approach, routine application of laparoscopy is not recommended, combined abdominoperineal approach can be considered if necessary. The perineal hernia after APE can be repaired safely and effectively using the described technique of patterning cropped and shaped mesh repair.

Expression of 5-hydroxytamine receptors in hepatic stellate cell and action of 5-hydroxytamine on biological characteristics of hepatic stellate cell / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate the expression of 5-hydroxytamine receptors in hepatic stellate cells HSCs and action of 5-hydroxytamine on biological characteristics of HSC.</p><p><b>METHODS</b>Liver ex vivo perfusion of collagenase and density gradient centrifugation were used to isolate hepatic stellate cell. RT-PCR was used to detect the expression of 5-hydroxytamine receptor subtypes 1A, 2A, 2B and 3. Western blot hybridization was used to elucidate the effect of 5-hydroxytamine and its 2A receptor antagonist ketanserin and 3 receptor antagonist ondanosetron on expression of transforming growth factor-beta1 (TGF-beta1) and Smad4 in HSC. HSCs were cultured on silicone membrane. The effect of 5-hydroxytamine, ketanserin and ondanosetron on cell contraction were studied.</p><p><b>RESULTS</b>HSC expressed 5-hydroxytamine receptors subtypes 1A, 2A and 2B. 5-hydroxytamine significantly increased the expression of TGF-beta1 and Smad4 in HSC (P < 0.05). This was antagonized by ketanserin, not by ondanosetron. 5-hydroxytamine induced cell contraction in a dose-dependant manner. Ketanserin antagonized this action, but ondanosetron did not.</p><p><b>CONCLUSIONS</b>HSCs express 5-hydroxytamine receptors. 5-hydroxytamine could affect the biological characteristics of HSC through its receptor mediation, and may play a role in the pathogenesis of liver cirrhosis and portal hypertension.</p>