Novel Pediatric Presentation of Pseudomyogenic Hemangioendothelioma: Diagnostic Pitfalls and Considerations of an Atypical Case

fusion transcript, confirming the diagnosis. This is the first described cases of diffuse, polyostotic PMH in a pediatric patient without soft tissue involvement. Furthermore, this is the first described case of histocyte-rich PMH. Overall, the case illustrates several unique features and diagnostic pitfalls important for pediatric pathologists to recognize in PMH. A high index of suspicion is necessary to perform the appropriate targeted molecular testing that might be needed to confirm the diagnosis.