PMID- 26759148 OWN - NLM STAT- MEDLINE DCOM- 20170405 LR - 20220317 IS - 1936-0568 (Electronic) IS - 1936-055X (Print) IS - 1936-055X (Linking) VI - 10 IP - 3 DP - 2016 Sep TI - Phosphaturic Mesenchymal Tumor Involving the Head and Neck: A Report of Five Cases with FGFR1 Fluorescence In Situ Hybridization Analysis. PG - 279-85 LID - 10.1007/s12105-015-0678-1 [doi] AB - Phosphaturic mesenchymal tumor (PMT) is a rare neoplasm; however, it is the most common cause of tumor-induced osteomalacia (TIO), a paraneoplastic syndrome characterized by renal phosphate wasting and hypophosphatemia. A subset of PMTs harbours an FGFR1 translocation although this alteration has not been demonstrated in PMT involving a head and neck site. We present a series of five PMTs involving the head and neck and demonstrate the diagnostic utility of fluorescence in situ hybridization (FISH) for detecting FGFR1 translocations. Patients' age and sex, tumor location, original diagnosis, the duration of symptoms, the presence of TIO, biochemical results, and medical management were reviewed. The median age at presentation was 45 (range, 24-58 years) and TIO was present in three cases. Four tumors involved soft tissue and one involved bone. Four out of the five tumors in our series were initially misdiagnosed. Three tumors were ultimately categorized as malignant PMT (two patients developed metastatic disease). FGFR1 translocation was present in two out of four cases and remained unknown in one case. In summary, we report on five cases of PMTs arising in the head and neck and confirm utility of FGFR1 FISH in the diagnosis of a subset of PMT. FAU - Wasserman, Jason K AU - Wasserman JK AD - Department of Pathology and Laboratory Medicine, The Ottawa Hospital - General Campus, Ottawa, ON, Canada. FAU - Purgina, Bibianna AU - Purgina B AD - Department of Pathology and Laboratory Medicine, The Ottawa Hospital - General Campus, Ottawa, ON, Canada. FAU - Lai, Chi K AU - Lai CK AD - Department of Pathology and Laboratory Medicine, The Ottawa Hospital - General Campus, Ottawa, ON, Canada. FAU - Gravel, Denis AU - Gravel D AD - Department of Pathology and Laboratory Medicine, The Ottawa Hospital - General Campus, Ottawa, ON, Canada. FAU - Mahaffey, Alyssa AU - Mahaffey A AD - Department of Pathology, Presbyterian University Hospital, University of Pittsburgh Medical Center, PUH A610.3, 200 Lothrop Street, Pittsburgh, PA, 15213, USA. FAU - Bell, Diana AU - Bell D AD - Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. FAU - Chiosea, Simion I AU - Chiosea SI AD - Department of Pathology, Presbyterian University Hospital, University of Pittsburgh Medical Center, PUH A610.3, 200 Lothrop Street, Pittsburgh, PA, 15213, USA. chioseasi@upmc.edu. LA - eng PT - Journal Article DEP - 20160112 PL - United States TA - Head Neck Pathol JT - Head and neck pathology JID - 101304010 RN - EC 2.7.10.1 (FGFR1 protein, human) RN - EC 2.7.10.1 (Receptor, Fibroblast Growth Factor, Type 1) RN - Oncogenic osteomalacia SB - IM MH - Adult MH - Female MH - Head and Neck Neoplasms/complications/genetics/*pathology MH - Humans MH - Hypophosphatemia/etiology MH - In Situ Hybridization, Fluorescence MH - Male MH - Mesenchymoma/complications/genetics/*pathology MH - Middle Aged MH - Neoplasms, Connective Tissue/etiology/*pathology MH - Osteomalacia MH - Paraneoplastic Syndromes/etiology MH - Receptor, Fibroblast Growth Factor, Type 1/*genetics MH - Translocation, Genetic MH - Young Adult PMC - PMC4972751 OTO - NOTNLM OT - FGFR1 OT - Fluorescence in situ hybridization OT - Phosphaturic mesenchymal tumour OT - Translocation OT - Tumor-induced osteomalacia EDAT- 2016/01/14 06:00 MHDA- 2017/04/06 06:00 PMCR- 2017/01/12 CRDT- 2016/01/14 06:00 PHST- 2015/10/30 00:00 [received] PHST- 2015/12/31 00:00 [accepted] PHST- 2016/01/14 06:00 [entrez] PHST- 2016/01/14 06:00 [pubmed] PHST- 2017/04/06 06:00 [medline] PHST- 2017/01/12 00:00 [pmc-release] AID - 10.1007/s12105-015-0678-1 [pii] AID - 678 [pii] AID - 10.1007/s12105-015-0678-1 [doi] PST - ppublish SO - Head Neck Pathol. 2016 Sep;10(3):279-85. doi: 10.1007/s12105-015-0678-1. Epub 2016 Jan 12.