Everolimus for Treatment of Pseudomyogenic Hemangioendothelioma
Michio Ozeki1, Akifumi Nozawa, Kaori Kanda
1Departments of *Pediatrics †Orthopedic Surgery §Pathology, Graduate School of Medicine, Gifu University, Gifu ‡Department of Pediatrics, Okayama University Graduate School of Medicine, Okayama, Japan.
Abstract:
Pseudomyogenic hemangioendothelioma (PMH) is a recently described vascular neoplasm that occurs most commonly in the soft tissue of the distal extremities of young adults. Metastatic PMH can be fatal and there are no effective medications. We describe a case of a 15-year-old boy with metastatic PMH, who responded to treatment with everolimus, a mammalian target of rapamycin inhibitor. Immunohistochemistry showed that mammalian target of rapamycin was expressed in PMH biopsy specimens, which may explain the reduction in PMH tumor size following treatment.
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