Solitary immunoglobulin G4-related inflammatory pseudotumor in the abdomen wall

A Huge Abdominal Wall Inflammatory Myofibroblastic Tumor: A Report of a Rare Case and Literature Review

An inflammatory myofibroblastic tumor (IMT), frequently misdiagnosed as a malignant neoplasm, is a rare tumor characterized by the presence of myofibroblastic spindle cells and infiltration of inflammatory cells. In the current study, a 49-year-old female patient with a huge abdominal mass in the left abdominal wall was examined. Diagnostic procedures included blood tests, as well as ultrasound, Doppler, and computed tomography (CT) scans, which revealed the presence of a huge complex multiloculated cystic lesion measuring 30 x 37 x 20 cm. The patient underwent complete excision of the mass. Histopathological examination confirmed the benign nature of the tumor and revealed no evidence of malignancy. A comprehensive review of the available literature shows that the current case is one of the few documented cases. The report concluded by emphasizing the importance of surgical intervention as the primary therapeutic strategy and the crucial role of histopathology in the diagnostic process.

IgG4-related Diaphragmatic Inflammatory Pseudotumor

A 71-year-old man underwent surgery for a pancreatic neuroendocrine tumor. Follow-up imaging showed swelling of the remnant pancreas, and he was histologically diagnosed with autoimmune pancreatitis based on endoscopic ultrasonography-guided fine-needle aspiration specimens. After two years, a tumor appeared on the liver surface. Although we planned to perform laparoscopic partial hepatectomy, the intraoperative findings showed that the tumor was located in the diaphragm. Partial resection of the diaphragm was performed, and the final diagnosis was an immunoglobulin G4-related inflammatory pseudotumor in the diaphragm. To our knowledge, this is the first reported case of an immunoglobulin G4-related diaphragmatic inflammatory pseudotumor.