J Korean Surg Soc.  2012 Jun;82(6):380-384.

A case of inflammatory myofibroblastic tumor originated from the greater omentum in young adult

• Kye BH
• Kim HJ
• Kang SG
• Yoo C
• Cho HM

Abstract

Inflammatory myofibroblastic (IMF) tumor is a rare solid tumor that often affects children. IMF tumors occur primarily in the lung, but the tumor may affect any organ system with protean manifestations. A 22-year-old woman was evaluated for palpable low abdominal mass that had been increasing in size since two months prior. Abdominal computed tomography showed a lobulated, heterogeneous contrast enhancing soft tissue mass, 6.5 x 5.7 cm in size in the ileal mesentery. At surgery, the mass originated from the greater omentum laying in the pelvic cavity and was completely excised without tumor spillage. Histologically, the mass was a spindle cell lesion with severe atypism and some mitosis. Immunohistochemistry for anaplastic lymphoma kinase-1 revealed that the lesion was an IMF tumor. Because of its local invasiveness and its tendency to recur, this tumor can be confused with a soft tissue sarcoma. Increasing physician awareness of this entity should facilitate recognition of its clinical characteristics and laboratory findings.

Keyword

Inflammatory myofibroblastic tumor; Spindle cell tumor; ALK-1; Omental mass

MeSH Terms

Child
Female
Humans
Immunohistochemistry
Lung
Lymphoma
Mesentery
Mitosis
Myofibroblasts
Omentum
Sarcoma
Young Adult

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