Meta-analysis of laparoscopic anterior resection with natural orifice specimen extraction (NOSE-LAR) versus abdominal incision specimen extraction (AISE-LAR) for sigmoid or rectal tumors.

BACKGROUND: Natural orifice specimen extraction surgery is a novel technique of minimally invasive surgery. The purpose of this study was to compare the safety of laparoscopic anterior resection with natural orifice specimen extraction (NOSE-LAR) and abdominal incision specimen extraction (AISE-LAR) for sigmoid or rectum tumors. METHODS: MEDLINE (PubMed), Embase, CENTRAL (Cochrane Central Register of Controlled Trials), Scopus, and ClinicalTrials databases were systematically searched for related articles up to August 2019. The primary outcomes included postoperative complications (overall postoperative complication, incision-related complication, anastomotic fistula, and severe complication) and pathologic results (lymph nodes harvested, proximal resection margin, and distal resection edge). The statistical analysis was performed on STATA 12.0 software. RESULTS: Ten studies comprising 1787 patients were used for meta-analysis. Compared with AISE-LAR, NOSE-LAR had more advantages in terms of overall postoperative complication (odds ratio (OR) = 0.65 (95% CI, 0.46 to 0.90; P = 0.01)), incision-related complication (OR = 0.13 (95% CI, 0.05 to 0.35; P < 0.01)), distal resection edge (weighted mean difference (WMD) = 0.17 cm (95% CI, 0.02 to 0.33 cm; P = 0.02)), recovery of gastrointestinal function (WMD = - 0.38 day (95% CI, - 0.70 to - 0.06 day; P = 0.02 )), pain scores in postoperative day 1 (WMD = - 1.64 (95% CI, - 2.31 to - 0.98; P < 0.01)), additional analgesics usage (OR = 0.21 (95% CI, 0.11 to 0.40; P < 0.01)) and hospital stay (WMD = - 0.71 day (95% CI, - 1.10 to - 0.32 day; P < 0.01)), while the operation time of NOSE-LAR was prolonged (WMD = 7.4 min (95% CI, 0.17 to 14.64 min; P = 0.04)). The anastomotic fistula, severe complication, lymph nodes harvested, proximal resection margin, intraoperative blood loss, and long-term outcomes in NOSE-LAR were comparable with AISE-LAR. CONCLUSIONS: The safety of NOSE-LAR was demonstrated, and it could be an alternative to conventional surgery in laparoscopic anterior resection for sigmoid and rectal tumors. However, further randomized and multi-center trials are required.

A Symptomatic Mucinous Cystic Neoplasm of the Mesentery: A Case Report.

Mucinous cystic neoplasms (MCNs) are rare tumors primarily observed in the pancreas but occasionally found in other locations such as the retroperitoneum, ovary, liver, and spleen. These neoplasms are histologically classified based on the degree of dysplasia, with some associated with invasive carcinoma. Colorectal surgeons infrequently encounter MCNs. Mesenteric MCNs pose a diagnostic challenge secondary to their atypical location, subtle histology, and lack of specific biochemical markers. In this context, we present a case involving a 68-year-old female who initially presented with an assumed ovarian mass. Subsequent exploration revealed a 12 cm MCN situated in the sigmoid mesentery, a location seldom associated with these tumors. The patient underwent laparotomy with successful resection and recovery. Histopathological analysis confirmed the neoplasm's mucinous epithelium with a complex papillary architecture. Immunohistochemical staining supported the diagnosis, revealing positivity for CK7, SATB2, and CDX2.

A Case of Spontaneous Remission of Membranous Nephropathy After the Removal of Nerve Epidermal Growth Factor-Like 1 Positive Sigmoid Colon Carcinoma.

Recently, the association between membranous nephropathy (MN) and malignancy has been recognized in about 30% of epidermal growth factor-like 1 (NELL-1) positive cases. However, the mechanism of association with MN and malignancy remains under search. In this report, we present a unique case of MN with positive staining for both thrombospondin type-1 domain-containing 7A (THSD7A) and NELL-1. An 80-year-old Japanese woman with nephrotic syndrome (NS) was diagnosed as an immunoglobulin (Ig)G1 subclass predominant secondary MN with weakly positive for THSD7A staining. Then, advanced cancer in the sigmoid colon was found during screening tests for malignancy. After the removal of colon carcinoma, complete remission was achieved at 28 weeks follow-up after operation. Five years later, she remained in remission and passed without recurrence. Thereafter, we examined again newly reported NELL-1 in renal biopsy specimens and found very strong staining along the glomerular capillary walls. Moreover, in resected tumor tissues, NELL-1 was strongly positive at the basal side of adenocarcinoma cells, but THSD7A staining was negative. This case report provides clinical details and highlights the utility of autoantibodies, especially NELL-1, in the diagnosis and treatment of secondary MN with malignancy.

Endovascular Management of External Iliac Blowout Syndrome Secondary to Recurrent Sigmoid Cancer.

Blowout syndrome caused by vascular invasion is a dreadful complication of late stage malignancies that carry high morbidity and poor overall prognosis in a compromised population. Endovascular management can offer minimally invasive and life-saving alternative for such acute conditions. We describe the case of a 62-year-old man with massive fresh bleeding per rectum and shock resulting from rupture of the left external iliac artery secondary to nearby infiltrative recurrent sigmoid cancer. This complication is rare, presents dramatically, and is frequently fatal. The patient was successfully treated with a stent graft deployment in order to achieve hemostasis and reinstituting the arterial integrity.

Pyogenic Granuloma of the Sigmoid Colon causing Intussusception in an Infant.

Pyogenic granuloma is a benign vascular tumor that may affect the gastrointestinal tract. This report describes a rare case of sigmoid-colon pyogenic granuloma in a 4-month-old boy causing intussusception. Resection and anastomosis were curative. The mother had history of high dose of progesterone exposure during initial weeks of conception for vaginal bleeding. This may point towards etiology of the lesion.