J Korean Radiol Soc.  2001 Oct;45(4):417-420. 10.3348/jkrs.2001.45.4.417.

Inflammatory Myofibroblastic Tumor of Perineal Soft Tissue: A Case Report

• Yang JM
• Kim KS
• Kwon ST
• Kim JC
• Song KS

• KMID: 1832938
• DOI: http://doi.org/10.3348/jkrs.2001.45.4.417

Abstract

Inflammatory myofibroblastic tumor is a rare benign condition of unknown etiology, and it may simulate malignancy. It is composed of myofibroblast, plasma cells and histiocytes and is found in lung, the liver, orbit, skin, mesentery, retroperitoneum and maxillary sinus. We report a case of inflammatory myofibroblastic tumor of perineal subcutaneous fat in a 35-year-old woman who complained of a palpable mass. Ultrasonography revealed a well-marginated lobulated hypoechoic lesion with peripheral poorly-defined hyperechoic strands in the subcutaneous fat of the right perineum. The lesion demonstrated low signal intensity on T1-weighted images and of heterogenous high signal intensity on T2-weighted images, compared with surrounding muscle. After intravenous injection of gadolinium, it showed clear homogeneous enhancement but poorlydefined adjacent strands. The final histologic diagnosis was inflammatory myofibroblastic tumor.

Keyword

Soft tissues, neoplasms; Soft tissues, US; Soft tissues, MR

MeSH Terms

Adult
Diagnosis
Female
Gadolinium
Histiocytes
Humans
Injections, Intravenous
Liver
Lung
Maxillary Sinus
Mesentery
Myofibroblasts*
Orbit
Perineum
Plasma Cells
Skin
Subcutaneous Fat
Ultrasonography
Gadolinium