Pseudomyogenic hemangioendothelioma—A case report and review
Pseudomyogenic hemangioendothelioma (PMH) is a rare vascular bone and soft tissue tumor, previously known as epithelioid sarcoma-like hemangioendothelioma, and pseudomyogenic (fibroma-like) variant of epithelioid sarcoma. This is a neoplasm of intermediate malignant potential, which will rarely metastasize.

A 63-year-old man was referred with a sacral mass identified on a computed tomography (CT) of the abdomen and pelvis, performed for epigastric pain related to acute pancreatitis. He had a past medical history of intermittent pain in the right upper buttock with radiation down the posterior aspect of the right leg over the last 3-4 years. He also reported discomfort while sitting for a long period of time, with occasional tingling in the tips of his toes.

A CT scan of the pelvis was performed, which demonstrated a well-defined lytic lesion with soft tissue attenuation involving the right sacrum. Extension of tumor to the sacral foramina and sacroiliac articular surface with loss of cortical bone was noted. Magnetic resonance imaging (MRI) of the pelvis demonstrated an expansile, well-circumscribed mass within the right sacrum, extending to the sacroiliac joint.

Source: Radiology case reports

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