Inflammatory Pseudotumor
Section Editor: Dharam M. Ramnani, MD
Virginia Urology, Richmond, VA, USA
Image Description
Recent demonstration of anaplastic lymphoma kinase (ALK) by immunohistochemistry in majority of cases supports the view that inflammatory myofibroblastic tumor is a neoplastic process. Besides ALK, other markers frequently expressed in IMTs include cytokeratin, actin, desmin, and p53. They are negative for S100, CD34, and CD117.