title: Sinonasal Phosphaturic Mesenchymal Tumor: A Rare and Misinterpreted Entity.
abstract: Objectives Oncogenic osteomalacia is a paraneoplastic syndrome in which the tumor secretes a peptide-like hormone, fibroblast growth factor, resulting in urinary loss of phosphates. Methods We present the case of a 50-year-old woman with a benign phosphaturic mesenchymal tumor (PMT) involving the ethmoid sinus with obstruction of the ostiomeatal complex causing unilateral nasal airway obstruction. Results The tumor was initially thought to be an esthesioneuroblastoma based on primary pathology interpretation and on clinical and radiographic appearance. However, a benign PMT was later confirmed by further testing. Conclusion The tumor was removed entirely by the endoscopic transnasal approach, leading to a full resolution of symptoms.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, United States.
authors.forename: Demetri
authors.initials: D
authors.lastname: Arnaoutakis
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, University of Florida College of Medicine, Jacksonville, Florida, United States.
authors.forename: Iman
authors.initials: I
authors.lastname: Naseri
keywords: endoscopic sinus surgery; phosphaturic mesenchymal tumor; skull base resection