Is a small-caliber or large-caliber endoscope more suitable for colonic self-expandable metallic stent placement? A randomized controlled study

Objectives: The colonic self-expandable metallic stent (C-SEMS) with a 9-French (Fr) delivery system allows for a small-caliber endoscope (SCE) to be used to treat malignant colonic obstruction. Despite the lack of evidence, the SCE has become popular because it is considered easier to insert than the large-caliber endoscope (LCE). We aimed to determine whether the SCE is more suitable than the LCE for C-SEMS placement. Methods: Between July 2018 and November 2019, 50 consecutive patients who were scheduled to undergo C-SEMS for colon obstruction were recruited in this study. Patients were randomized to the SCE or LCE group. The SCE and LCE were used with 9-Fr and 10-Fr delivery systems, respectively. The primary outcome was the total procedure time. Secondary outcomes were the technical success rate, complication rate, clinical success rate, insertion time, guidewire-passage time, stent-deployment time, and colonic obstruction-scoring-system score. Results: Forty-five patients (SCE group, n = 22; LCE group, n = 23) were analyzed. The procedure time in the LCE group (median, 20.5 min) was significantly ( p = 0.024) shorter than that in the SCE group (median, 25.1 min). The insertion time in the LCE group (median, 2.0 min) was significantly ( p = 0.0049) shorter than that in the SCE group (median, 6.0 min). A sub-analysis of the procedure difficulties showed that the insertion time in the LCE group (median, 5.0 min) was significantly shorter than that in the SCE group (median, 8.5 min). Conclusion: Both LCE and SCE can be used for C-SEMS; however, LCE is more suitable than SCE as it achieved a faster and equally efficacious C-SEMS placement as that of SCE. Clinical trial registration number: University Hospital Medical Information Network Clinical Trials Registry (UMIN 32748)

Transtumoral endoprothesis in surgery of colorectal cancer, complicated with colonic obstruction: advantages and disadvantages. A review of the literature

A multifactorial analysis of the literature data on the treatment of acute tumor colonic obstruction using minimally invasive endoscopic surgical technology was carried out. On the basis of the analysis of special publications, the effectiveness of stenting of the large intestine, as a minimally invasive endoscopic method of decompression, is presented. Indications and contraindications for colorectal stenting, advantages and disadvantages, possibilities and prospects of endoscopic decompression of the colon are described in detail. It is postulated that stenting, used in acute tumor obstruction of the colon as a «bridge to surgery», being a worthy alternative to classical colostomy, allows an effective antegrade decompression of the colon and prepares the patient to surgical treatment with the performance of oncological justified primary radical and one-stage restorative operations in more optimal conditions with minimal risk. It is shown that in the late stages of the malignant process and in the presence of neresect-leucorrhoea colorectal cancer, as well as in the presence of absolute contraindications to a radical surgeon Colon stenting can serve as the final treatment for inoperable patients.

Giant Paraesophageal Hernia With Obstructing Splenic Flexure Mass in the Left Hemithorax

Giant paraesophageal hernias contain greater than fifty percent of the stomach above the diaphragm. Over fifty percent of large bowel obstructions are due to colorectal adenocarcinoma. Here, we present a rare case of a 69-year-old female patient who developed a closed loop colonic obstruction caused by a colonic mass in the distal transverse colon within a giant paraesophageal hernia. We successfully performed emergent paraesophageal hernia reduction and mesh repair with extended right hemicolectomy and ileocolonic anastomosis. Emergent hernia repair via an abdominal approach can be used in this setting.