Inflammatory pseudotumor is an unusual benign but potentially invasive lesion. In the head and neck area, it mainly involves the orbit and paranasal sinuses. We present a case in tonsil and neck. After tonsillectomy and steroid therapy, there has been no recurrence.

A 71-year-old man was referred to us for investigation of a liver mass and adenomyomatosis of gallbladder. Findings on ethoxybenzyl diethylenetriamine-enhanced MRI (EOB-MRI) led to a presumptive diagnosis of a 1.5 cm hepatocellular carcinoma (HCC) in the right posterior lobe of the liver. Transcatheter arterial chemoembolization and radiofrequency ablation of the tumor were attempted. After 2 m...

IgG4-related disease is a unique systemic inflammatory condition characterized by pseudotumorous formation or swelling of affected organs and high-serum IgG4 concentrations. Further studies have demonstrated that IgG4-related disease can involve a variety of organs including the pancreas ( type 1 autoimmune pancreatitis) , bile duct ( IgG4-related sclerosing cholangitis), liver (IgG4-related he...

Inflammatory pseudotumor of the spleen with expression of follicular dendritic cell markers is an extremely rare lesion with only a few cases reported previously. The present study reports on an inflammatory pseudotumor of the spleen 10 × 8 × 7 cm in size that was incidentally found in a 61-year-old man and increased gradually in size during a period of 3 months. Abdominal ultrasonography revea...

Background: Pulmonary lesions called “inflammatory pseudotumors” were known for many years and were regarded as part of a spectrum of lesions called “plasma cell granulomas” (1-5) Various terms were applied: inflammatory pseudotumor, plasma cell granuloma, plasma cell pseudotumor, xanthomatous pseudotumor, pseudosarcomatous myofibroblastic proliferation, and inflammatory myofibrohistiocytic pro...