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Inflammatory Myofibroblastic Tumor

This spectacular case is an example of an inflammatory myofibroblastic tumor centered in the gallbladder. Note that there is abundant keratin expression (there was also actin expression), which can be a pitfall. The myofibroblastic cells show macronucleoli, a typical feature. Note also the background inflammatory mix.

Case provided by Dr. Elizabeth Montgomery, Professor of Pathology and Vice Chair of Anatomic Pathology at the University of Miami, and Editor-In-Chief at Innovative Science Press. You can check out her GI and Soft Tissue volumes as well as our other titles at:


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