Extragenital endometrial stromal sarcoma of transverse mesocolon: A diagnostic conundrum

Endometrial stromal sarcoma (ESS) is a rare uterine neoplasm infrequently arising in extra-genital sites. Herein, we report an extremely rare case of primary extra-genital ESS of transverse mesocolon occurring in a 51-year-old female presenting with gradually increasing abdominal mass. The clinical diagnosis considered was a gastrointestinal stromal tumor. Intra-operatively, the mass was confined exclusively to the transverse mesocolon. Microscopy revealed a cellular tumor composed of oval to elongate neoplastic cells with hyperchromatic nuclei, inconspicuous nucleoli and were immunoreactive for CD10, progesterone receptor (PR), estrogen receptor (ER), and PAX8; negative for KIT, CD34, SMA, S100, synaptophysin, chromogranin, WT-1, and calretinin. A distinct arborizing network of arterioles along with foci of endometriosis was also seen. We present this case for its extreme rarity and the challenges entailed in its diagnosis.

Internal hernia through dual defects: defects in transverse mesocolon and lesser omentum a rare presentation: case report

Internal hernias have the potential to cause small bowel obstruction. Congenital internal hernias are impossible to diagnose clinically and radiologically in asymptomatic patients. We presented a case of 36 years male with complaints of pain abdomen abdominal distension and vomiting, contrast-enhanced CT showed an internal hernia with small bowel obstruction. On exploration, small bowel loops were identified near the lesser curvature and they are congested an edema was present, a defect of 5×1 cm was identified in the transverse mesocolon and was managed by reducing the hernia sac and closure of the defect in the mesentery of the transverse colon. If the intervention was delayed internal hernia might lead to ischemia, gangrene increasing morbidity and mortality. Early intervention is the key to decrease morbidity and mortality.

EP.WE.412An unusual case of a 13.8cm Gastric Schwannoma invading into Transverse Mesocolon: A case report and literature review

Gastric Schwannomas (GS) are benign, slow-growing, Sub-mucosal tumours (SMT’s) that constitute 0.2% of all gastric tumours. They usually have a homogenous appearance on contrast enhanced computed tomography of the abdomen (CECT Abdomen) and rarely show malignant features such as irregular borders, calcification, local invasion and mucosal ulceration. Due to lack of mucosal changes and poor yield during Oesophago-Gastro-Duodenoscopy (OGD) and biopsy, they are often misdiagnosed as Gastro-Intestinal Stromal tumours (GISTs), a malignant SMT. Treatment options range from conservative management to major open resections and are dependent on the size and clinical presentation. Histologically, GS are spindle cells tumours with lymphoid cuffing. On Immunohistochemistry, they test positive for S100 but negative for DOG1, Smooth muscle actin and Desmin which are markers of GISTs. Here we present the case of a 61-year-old female with a 15-year history of epigastric fullness that turned out to be a 13.8cm GS originating from the greater curvature of the stomach. On CECT Abdomen, the tumour appeared heterogeneous, with multiple calcium deposits and local invasion into the transverse mesocolon. The patient underwent a Sub-total gastrectomy with en-bloc transverse colectomy. Symptoms from GS can be vague and can pose a significant diagnostic and investigative dilemma. Physicians and Surgeons should have a low threshold to investigate prolonged symptoms with CECT Abdomen. Despite their benign nature, if left undiagnosed, GS can grow to significant sizes and mimic malignant gastric tumours on conventional imaging resulting in unconventionally major resections.

Blunt abdominal trauma with duodenal dissection: A case report

We describe a new case of duodenal wound with complete transection in a 22-year-old patient following a motorcycle accident. He presented to the emergency room of the rural Regional Hospital of Edéa in Cameroon with a clinical picture of acute abdomen and post-trauma hemodynamic instability. A peritoneal puncture brought back an incoagulable blood. An exploratory laparotomy revealed a large hemoperitoneum mixed with food debris. A tear of the omentum and transverse mesocolon and a complete section of the third duodenum at the beginning of its free portion were observed. The surgeon performed emergency closure of both duodenal stumps and performed an isoperistaltic lateral gastrojejunal bypass. A transfer to a specialized center for a more anatomical continuity was considered, but the imminence of a humanitarian mission in the hospital prompted the surgeon to seize the opportunity of this mission for the reoperation. This surgical revision was performed on the fifth postoperative day. A resection of the distal duodenal stump and the adjacent jejunal segment including the anastomosis was performed. Continuity was restored by a mechanical duodenal-jejunal anastomosis. The patient was discharged on the 18th postoperative day. This type of lesion is difficult to manage in an emergency situation in a structure with limited technical resources. Unfortunately, surgeons treating polytraumatized civilians are encountering an increasing number of blunt duodenal wounds requiring laborious management.

Importance of the Duodenal Window and Fredet’s Fascia in Laparoscopic Right Hemicolectomy: Technical Note

Background: Laparoscopic right hemicolectomy requires a precise anatomical dissection to mobilise the right and proximal transverse mesocolon, following the avascular fusion planes of Toldt and Fredet. Fredet’s plane is crucial to the preparation of the origin of vessels. Easy access to Fredet’s and Toldt’s fasciae can be obtained through the “duodenal window”, a flimsy area of the root of the proximal transverse mesocolon, the margins of which are the right border of the superior mesenteric pedicle, the ileocolic pedicle, the right colic pedicle and the marginal artery. Method: We propose that dissection of the duodenal window should be the first step in laparoscopic right hemicolectomy, to obtain easy access to the duodenopancreatic plane and prepare the fascia. Results: This “duodenal window-first” technique has been applied in 45 laparoscopic right hemicolectomies and 14 laparoscopic extended right hemicolectomies, with only two conversions to open surgery. The duodenal window was easily identified in all but 3 cases with significant visceral obesity. No significant intra- or postoperative morbidity was recorded in these cases and the median postoperative length of stay was 4 days. All resections were R0 and an adequate number of retrieved lymph nodes were obtained in almost all cases. Conclusion: The duodenal window-first approach is a feasible and safe technique to standardise the first steps of radical laparoscopic right hemicolectomy, allowing prompt and complete anatomical identification and dissection.

Transverse colon invasion from intrahepatic cholangiocarcinoma with lymph node metastasis in the regional mesocolon: a case report

Background Intrahepatic cholangiocarcinoma (ICC) is an aggressive cancer with high frequency of extrahepatic metastasis at diagnosis. However, there have been very few reports of direct invasion to transverse mesocolon with lymph node metastasis in the regional mesocolon. Case presentation A 71-year-old man presented to our hospital with anorexia and weight loss. Abdominal computed tomography (CT) revealed enlarged gallbladder wall with intrahepatic tumor extended from the gallbladder. The transverse colon was located adjacent to the gallbladder and its wall was thickened, indicating tumor invasion. Some enlarged lymph nodes were observed in the transverse mesocolon, suggesting metastatic or inflammatory lymph node swelling. Percutaneous liver biopsy detected poorly differentiated adenocarcinoma. After confirming the absence of remote metastasis and peritoneal dissemination, surgical resection including right hepatectomy and right hemicolectomy was performed. The pathological diagnosis was adenosquamous carcinoma of the liver and lymph node metastasis in the transverse mesocolon. The surgical margins were negative and R0 resection was achieved. Although adjuvant chemotherapy was administered, follow-up CT detected multiple metastases to the lung 4 months after surgery. The patient died 12 months after the operation. Conclusions Direct colon invasion from ICC may cause lymph node metastasis in the regional mesocolon. Careful assessment is necessary for the diagnosis of enlarged lymph nodes in ICC with direct colon invasion.

Transmesocolon internal hernia masking as simple sigmoid volvulus

Transmesocolon internal hernias are very rare causes of bowel obstruction. Transmesenteric internal hernias normally associated with small bowel. It can be challenging to diagnose transmesocolon internal hernia hence we present a 93-year-old patient who was misdiagnosed with simple sigmoid volvulus on CT abdomen. She underwent endoscopic colonic decompression. Patient continued to deteriorate in the ward, and CT abdomen was repeated; it revealed the cause of the sigmoid volvulus was due to a defect through transverse mesocolon resulting in internal hernia. Patient was diagnosed with transmesocolic internal hernia with sigmoid volvulus. Patient underwent emergency laparotomy and Hartmann procedure. Transmesocolic internal hernia can be easily missed and needs to be considered when diagnosing patients with large bowel volvulus or obstruction.