On the other hand, among 15 studies (n = 329) with available data, an additional read this port (adding only one port) was needed during the operation in a total of 16 cases (4.9%; 16/329). No major intraoperative complications were observed in these series. Table 2 Perioperative parameters of single-incision laparoscopic colorectal surgery. 3.4. Surgical Specimen Five studies including right hemicolectomy, sigmoidectomy, and anterior resection showed that the range of specimen lengths was 15�C43.5cm (Table 4) [20, 24, 27, 28, 35]. All margins were free of cancer in these series. In 18 studies with available data, the range of number of removed lymph nodes for malignant cases and potential malignant diseases was 12�C24.6 (Table 4) [19, 20, 22�C25, 27, 28, 30�C39].

Table 4 Postoperative recovery of single-incision laparoscopic colectomy. 3.5. Postoperative Parameters 3.5.1. Perioperative Mortality Overall, 2 perioperative deaths (0.4%; 2/477) were observed. One death, reported by Adair et al., occurred on postoperative day 10, 8 days after discharge from the hospital, due to a pulmonary embolus [36]. Gandhi et al. reported another death, which was encountered in a patient following palliative SILC right hemicolectomy as a result of complications from metastatic disease [33]. 3.5.2. Morbidity, Reoperation, and Length of Hospital Stay (LOS) Postoperative morbidities varied across studies (0�C29.4%). Overall 43 patients (11.7%; 43/368) developed complications related to surgery. The most frequent complication was ileus (n = 10) and wound infection/hematoma/seroma (n = 10) followed by and anastomotic bleeding (n = 4) and arrhythmia (n = 3).

Overall 6 out of 419 patients (1.4%) required reoperation and the reasons in these cases were as follows: anastomotic leakage (n = 2), anastomotic bleeding (n = 1), wound hematoma (n = 1), cecal ischemia with perforation (n = 1), and a negative relaparotomy to rule out anastomotic leakage (n = 1). In all 21 studies, the range of length of hospital stay (LOS) also varied across reports: 2.7�C9.2 days. Notably, 2 studies reported fewer than 3 days of LOS in their series Anacetrapib [33, 37]. 3.5.3. Postoperative Anesthesia Katsuno et al. reported that analgesics were used 1.4 �� 1.2 times in addition to routinely using the epidural catheter (0.2% ropivacaine hydrochloride hydrate 600mg plus morphine hydrochloride hydrate 8mg) for the first 2 to 3 days as postoperative anesthesia and no patients required analgesics after the fourth postoperative day [23]. Wolthuis et al.