were located in the body of the stomach (4 at angle, 4 in the lower body, and the other 2 in the mid-body). Among the 10 gastric SMTs located in the body of stomach, 4 tumors were localized on the anterior wall, 2 were localized on the posterior wall, and 4 were localized along the greater curvature. Eight of 10 patients under- went routine intraluminal endoscopic biopsy, but all failed to obtain significant microscopic diagnosis other than chronic gastritis. Fig. 2. Operating time and tumor characteristics. The operating time varied according to tumor size and location, but generally tended to decline with the accumulation of the surgeon’s experience. HPF= high power field; LB = lower body; MB = mid-body; GC = greater curva- ture; AW = anterior wall; PW = posterior wall; exo = exophytic; endo = endoluminal. Table 1. Patients, tumor characteristics, and perioperative outcomes 175 SILS for Gastric SMT Single-incision laparoscopic gastric wedge resection was suc- cessfully completed in 9 patients without conversion to conven- tional laparoscopic surgery. In 1 patient, moderate hemorrhagic event occurred during cholelcystectomy after the successful gastric resection, and 2 additional trocars were needed to safely perform simultaneous cholecystectomy for comorbid gall bladder stones. All tumors were resected via an extraluminal approach. The mean op- erating time was 66.5 minutes (range, 24~132 minutes). The oper- ating time varied a lot according to the tumor size and location (Fig. 2). The estimated blood loss during the operation was minimal in all patients. The mean postoperative hospital stay was 5 days (range, 4~7 days). The postoperative course was uneventful, with no post- operative complications in the follow-up period. The final pathol- ogy confirmed 5 gastrointestinal stromal tumors, 4 schwannomas, and 1 heterotopic pancreas. Eight specimens showed ≤5 mitoses in 50 high-power fields, although 1 case showed 11 mitoses per 50 high-power fields. The mean distance from the tumor to the resection margin was 0.4 cm (range, 0.1~1.5 cm). Nine patients were followed regularly, and the mean follow-up duration was 13 months (range, 2~25 months), during which time no recurrence or metastases were observed (Table 1). The mean follow-up duration for 5 gastrointestinal stromal tumor (GIST) patients was 15 months (range, 12~25 months). Discussion Gastric SMTs encompass both neoplastic and nonneoplastic lesions of various etiologies, which can be either benign or poten- Case Location Growth pattern Tumor size (cm) Histological diagnosis Mitotic count (/HPF) Surgical margin (mm) Operating time (min) Postoperative hospital stay (day) 1 LB, GC Exophytic 3.8 Schwannoma 1 2 132 7 2 Angle, AW Exophytic 2.5 GIST 1 3 76 5 3 MB, GC Endoluminal 2.0 GIST 2 6 39 4 4 LB, PW Exophytic 2.5 GIST 0 1 24 4 5 MB, PW Endoluminal 2.2 Heterotopic pancreas - 3 68 5 6 LB, GC Exophytic 3.5 Schwannoma - 5 95 6 7 Angle, AW Exophytic 2.0 GIST 1 3 51 7 8 Angle, AW Exophytic 4.5 Schwannoma 1 15 115 7 9 Angle, AW Exophytic 3.4 Schwannoma 1 6 65 4 10 LB, GC Endoluminal 2.1 GIST 11 15 30 4 HPF = high power field; LB = lower body; GC = greater curvature; AW = anterior wall; GIST = gastrointestinal stromal tumor; MB = mid-body; PW = posterior wall.