inflammatory myofibroblastic tumor
Definition: heterogeneous group of morphologically similar lesions composed of myofibroblasts, plasma cells, and other chronic inflammatory cells. In children and young adults, occurs preferentially in soft tissue and viscera and shows clonal features. In adults, it may occur in any site and is usually not clonal.
See Also: pseudotumor
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Examples: glitazone, GI cocktail, etc.