title: Neoplastic pathology of oncogenic osteomalacia/rickets.
abstract: Reported are two cases of oncogenic osteomalacia, each caused by a small mesenchymal tumor, with detailed assessment of the tumors by light microscopy, electron microscopy, and immunohistochemistry. One tumor was a primitive mesenchymal tumor with prominent giant cell and vascular components, and the second resembled the giant cell variant of soft parts chondroma. Osteoclast-like, multinucleated giant cells and vascularity were prominent features in both tumors. Although the literature documents a histologically heterogeneous group of tumors as causing this syndrome, most have multinucleated giant cells and/or extensive vascularity. The high incidence of these two histologic features in this group of tumors suggests that either or both may be related to the pathogenesis and/or metabolic consequences of oncogenic osteomalacia/rickets.
mesh_terms: D000328:Adult; D002812:Chondroma / Q000150:complications* / Q000378:metabolism / Q000473:pathology; D005260:Female; D006225:Hand; D006801:Humans; D006887:Hydroxycholecalciferols / Q000378:metabolism; D008297:Male; D008444:Maxillary Sinus Neoplasms / Q000150:complications* / Q000378:metabolism / Q000473:pathology; D009364:Neoplasm Recurrence, Local; D010018:Osteomalacia / Q000209:etiology* / Q000378:metabolism; D010255:Paranasal Sinus Neoplasms / Q000150:complications*; D012279:Rickets / Q000209:etiology* / Q000378:metabolism
chemical_list: D006887:Hydroxycholecalciferols