KIT (CD117) Positive Huge Primary Malignant Extra Gastrointestinal Stromal Tumors (EGISTs) Arising From Jejunal Mesentery: A Rare Case Report

Tumors arising outside gastrointestinal systems are known as extra gastrointestinal stromal tumors (EGISTs). Outside gastrointestinal sites include the mesentery, omentum, peritoneum, pancreas, and liver. Our case highlights a rare occurrence of an EGIST in jejunal mesentery in a 45-year-old male wi...

Full description

Saved in:
Bibliographic Details
Published inCurēus (Palo Alto, CA) Vol. 14; no. 12; p. e33168
Main Authors Sajjanar, Anita B, Katole, Nilesh T, Vagha, Sunita J
Format Journal Article
LanguageEnglish
Published United States Cureus Inc 31.12.2022
Cureus
Subjects
Abdomen
Anemia
Case reports
Connective tissue diseases
Cytoplasm
Gastroenterology
Gastrointestinal cancer
Histopathology
Medical prognosis
Mesentery
Mutation
Oncology
Pathology
Small intestine
Smooth muscle
Tomography
Tumors
extra gastrointestinal stromal tumor
histopathology
mesentery
mdct scan
jejunum
immunohistochemistry
malignant
Online AccessGet full text

Cover

More Information
Summary:Tumors arising outside gastrointestinal systems are known as extra gastrointestinal stromal tumors (EGISTs). Outside gastrointestinal sites include the mesentery, omentum, peritoneum, pancreas, and liver. Our case highlights a rare occurrence of an EGIST in jejunal mesentery in a 45-year-old male with an asymptomatic large abdominal growth and weight loss. A contrast-enhanced multi-dimensional computed tomography scan showed a large heterogeneous mass in the left hypochondrium. lumbar, and paraumbilical regions. Later, the patient underwent surgical resection of the tumor along with the involved jejunal segment and small tumor masses in the mesentery. Histopathological examination reported a malignant EGIST of mesentery and invasion into the jejunum, further confirmed by immunohistochemistry (IHC) markers like CD117 and smooth muscle actin with a high proliferative index (Ki67). One should be aware that these are different from other malignancies arising from the mesentery. Their cell of origin is different and needs a specific type of treatment. The clinical history, radiological findings, histopathology, and IHC help in diagnosing especially when they are arising from unusual areas like jejunal mesentery. Surgical intervention and chemotherapy are mainstay treatments.
ISSN:2168-8184
2168-8184
DOI:10.7759/cureus.33168