A mesenteric solid tumor with unusual features in a young male: A case report

Abstract

The current study presents a mesenteric mesenchymal tumor case, with unusual features in diagnostic imaging and histology. A 16-year-old male was admitted to the hospital with abdominal pain. Computed tomography (CT) revealed an abdominal mass, 2 cm in diameter. The results of contrast-enhanced CT, magnetic resonance imaging and 18F-fluorodeoxyglucose positron emission tomography indicated no specific features suggestive of its histology. Two arteries branching from the superior mesenteric artery were observed feeding the hypervascular tumor. After endoscopic and other laboratory findings revealed no additional lesions, the lesion was diagnosed as a primary mesenteric tumor. As the possibility of malignancy and future bleeding from this tumor could not be ruled out, a resection of the tumor was performed. During the surgery, the tumor, which was well circumscribed and hypervascular, was located in the mesentery of the jejunum. The resected tumor did not exhibit typical histological characteristics, and was labeled as ‘myxoid smooth muscle neoplasm of uncertain biologic potential’. At 2 years after surgery, the patient remained well without evidence of recurrence. As primary mesenteric tumors are rare, particularly in young patients, it is considered important that this type of unusual tumor be included in the differential diagnosis for mesenteric tumors.

Atypically located accessory splenic hemangiosarcoma in a Dog: Diagnostic value of triple‐phase computed tomography

“…However, in dogs, no mesenteric tumours have been reported to be supplied by the splenic artery, and therefore, the right caudal abdominal mass connected to the spleen in the present case was primarily considered to be an accessory splenic tumour. Given that mesenteric tumours generally receive a supply of mesenteric blood vessels (Ichikawa et al., 2017), if a tumour within the mesentery receives a supply from splenic arteries, an accessory spleen may be suspected.…”

Myxoid Inflammatory Myofibroblastic Sarcoma

“…One case was reported previously. 5 Hematoxylin-and-eosin (H&E) slides and any available immunohistochemistry (IHC) were re-reviewed. Additional IHC for CD30 (clone Ber-H2; dilution1:200; pressure cooker antigen retrieval; Dako) was performed on 10 tumors, using 4-µm sections cut from formalin-fixed paraffin-embedded (FFPE) tissue.…”

“…contributed one case each. One case was reported previously 5 . Hematoxylin-and-eosin (H&E) slides and any available immunohistochemistry (IHC) were re-reviewed.…”

“…The median tumor size was 8.5 cm (range: 2 to 26.5 cm). Grossly, tumors were described as gelatinous (11 tumors), hemorrhagic (7), lobulated/nodular (5), translucent (5), cystic/multicystic (3), solid (3), and rubbery (2) (Fig. 2B).…”

A Giant Solid-Cystic Mesenteric Fibromatosis with Unusual Synchronous Skin Fibromatosis

“…1,2 MF is a rare benign tumor composed of monoclonal proliferation of fibroblasts and myofibroblasts without any distant metastatic potential but with a high degree of local invasion and recurrence. These tumors mostly originated from the abdominal muscle layer and fascial sheath, [3][4][5] and they usually occur sporadically, but familial adenomatous polyposis (FAP) and Gardner's Syndrome are the most common hereditary conditions associated with these tumors. [6][7][8] Prior surgery, trauma, and high estrogen states can play an important role as predisposing factors.…”