title: [Maxillary tumor revealing primary hyperparathyroidism].
abstract: BACKGROUND
  Primary hyperparathyroidism can infrequently present as a giant cell tumor of the jaw. We report the case of a patient presenting with a giant cell tumor leading to the discovery of a parathyroid adenoma.
  
  
  METHODS
  A 70-year-old male patient consulted for a stiffly swollen right jaw. The radiological assessment revealed osteolytic lesions of the right maxilla. The calcium and phosphate levels were disrupted and the parathyroid hormone level was high. A neck ultrasonography revealed a parathyroid adenoma. The patient underwent excision of the maxillary mass and of the parathyroid adenoma; the outcome was marked by normalization of calcium and phosphate levels.
  
  
  CONCLUSIONS
  Giant cell tumors unusually reveal primary hyperparathyroidism and their maxillary location is exceptionally rare. The diagnosis is made on parathyroid hormone level and imaging. The treatment is surgical.
authors.affiliation: Service d'ORL et de chirurgie cervico-faciale, hôpital 20-Août, CHU Ibn Rochd, Casablanca, Maroc. Electronic address: dr_abouelfadl_m@hotmail.fr.
authors.forename: M
authors.initials: M
authors.lastname: Abou-Elfadl
authors.affiliation: Service d'ORL et de chirurgie cervico-faciale, hôpital 20-Août, CHU Ibn Rochd, Casablanca, Maroc.
authors.forename: A
authors.initials: A
authors.lastname: Belamkaddem
authors.affiliation: Service d'ORL et de chirurgie cervico-faciale, hôpital 20-Août, CHU Ibn Rochd, Casablanca, Maroc.
authors.forename: M
authors.initials: M
authors.lastname: Mahtar
authors.affiliation: Service d'ORL et de chirurgie cervico-faciale, hôpital 20-Août, CHU Ibn Rochd, Casablanca, Maroc.
authors.forename: M
authors.initials: M
authors.lastname: Roubal
authors.affiliation: Service d'ORL et de chirurgie cervico-faciale, hôpital 20-Août, CHU Ibn Rochd, Casablanca, Maroc.
authors.forename: F
authors.initials: F
authors.lastname: Kadiri
mesh_terms: D000236:Adenoma / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D000368:Aged; D003937:Diagnosis, Differential; D018212:Giant Cell Tumor of Bone / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D049950:Hyperparathyroidism, Primary / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D008297:Male; D008441:Maxillary Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D009378:Neoplasms, Multiple Primary / Q000000981:diagnostic imaging / Q000473:pathology; D010282:Parathyroid Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D011859:Radiography
keywords: Hyperparathyroidism; Hyperparathyroïdie; Maxilla; Maxillaire; Tumeur; Tumor