Backgrounds/Aims: Acute appendicitis is one of the most common emergent disease in the general population requiring surgical treatment. However, only a few cases of appendicitis after liver transplantation (LT) were reported. We described experiences of acute appendicitis after LT in single center. Methods: From March 1988 to July 2019, we reviewed retrospectively all the patients who diagnosed with acute appendicitis after LT at the Seoul National University Hospital. We described and analyzed clinical outcomes of appendectomy after LT. Results: A total of 12 patients out of 2,237 LT patients underwent appendectomy due to acute appendicitis. The mean age was 48±12 years. Nine patients (75%) underwent deceased donor liver transplantation (DDLT) and three patients (25%) underwent living donor liver transplantation (LDLT). The mean days from transplantation to the onset of acute appendicitis was 739 (range 57-4,496) days. Every patients underwent appropriate appendectomy within 1 days after visiting hospital. Leukocytosis was seen in three patients (25%). Seven patients (58%) underwent laparoscopic appendectomy and five patients (42%) underwent open appendectomy. The total operative time was 47.5 (range 25-135) minutes. The median postoperative hospitalization was 4 (range 2-11) days. There was no postoperative complications documented. There was no significant difference of clinical outcomes between laparoscopic appendectomy group and open appendectomy group. Conclusions: Early surgical management achieved satisfactory postoperative results without graft dysfunction after LT. Laparoscopic appendectomy also could be applicable with safe and feasible outcomes even in post-LT recipients.

Purpose Laparoscopic pylorus-preserving gastrectomy (LPPG) has a nutritional advantage over laparoscopic distal gastrectomy (LDG), however, may be less beneficial in overweight patients in terms of weight loss. The purpose of this study was to compare LPPG and LDG in overweight patients with early gastric cancer. Methods Clinicopathologic data of overweight patients (body mass index [BMI], ≥25 kg/m 2 ) who underwent LPPG (n = 63) or LDG (n = 183) in 2016–2018 were retrospectively reviewed. In the LDG group, patients with Billroth-II anastomosis were separately grouped (LDG B-II, n = 66). Changes in BMI, hemoglobin, albumin, and total protein were compared among groups. Results Changes in BMI were not significant different among groups. The LPPG group had significantly higher albumin than the LDG group at postoperative 6 months and 1 year. The LPPG group had higher total protein than the LDG group at postoperative 2 years. The LPPG group had a higher complication rate of Clavien-Dindo classification III or higher (20.6%) than the LDG group (8.2%, P = 0.007). However, after excluding pyloric stenosis, there was no significant difference among groups (LPPG vs. LDG, P = 0.290; LPPG vs. LDG B-II, P = 0.921). Conclusion LPPG and LDG groups showed similar weight loss. However, the LPPG group had higher albumin and protein levels than the LDG group of overweight patients. Thus, it is not necessary to select LDG only for weight loss. LPPG may be selected as one option due to its potential nutritional benefit when pyloric stenosis is properly managed.

Purpose De novo malignancy is common after liver transplantation (LT); however, there are limited reports on the clinical outcomes of gastric cancer surgery after LT. Our study aimed to investigate the feasibility and safety of gastric cancer surgery after LT. Methods Seventeen patients underwent gastric cancer surgery after LT at a single institution between January 2013 and June 2021. We retrospectively collected data on surgical complications, survival, and recurrence status of these cases. Results Fifteen patients (88.2%) underwent curative gastrectomy, with 10 open distal (66.7%) and 5 laparoscopic distal (33.3%) gastrectomies. Surgical and severe complication rates were 3 of 15 (20.0%) and 1 of 15 (6.7%), respectively. There were no significant differences between laparoscopic (33.3%) and open surgery (66.7%) in terms of operation time and complication rate. No surgery-related mortalities occurred. Immunosuppressants could be maintained without difficulty, and no suspicious acute rejection was identified during the perioperative period. There was 1 recurrence after curative surgery (recurrence rate, 6.7%), and the 5-year cancer-specific survival rate after curative surgery was 93.3%. Conclusion Laparoscopic gastrectomy can be safely done even after LT in terms of postoperative complications and graft safety.

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