title: Knee brown tumor revealing a primary hyperparathyroidism: a case report.
abstract: Primary hyperparathyroidism is a common endocrine disorder, asymptomatic and diagnosed through a fortuitous hypercalcemia. Brown tumors are exceptional but severe hyperparathyroidism bone complications. We report in this paper an original observation of hyperparathyroidism due to a parathyroid adenoma presenting as a brown tumor. A 28 year-old girl admitted for a bone tumor of the knee, the blood test shows hypercalcemia with hyperparathyroidism, bone biopsy revealed giant cell lesions characteristic of brown tumors.
authors.affiliation: Department of internal medicine and cardiology, El Okbi Hospital, Guelma, Algeria.
authors.forename: Aoulia
authors.initials: A
authors.lastname: Dekaken
authors.affiliation: Laboratory of medical biochemistry, IBN Zohr Hospital, Guelma, Algeria.
authors.forename: Adel
authors.initials: A
authors.lastname: Gouri
authors.affiliation: Department of internal medicine and cardiology, El Okbi Hospital, Guelma, Algeria.
authors.forename: Ahmed Aimen
authors.initials: AA
authors.lastname: Bentorki
authors.affiliation: Department of hematology, IBN Zohr Hospital, Guelma, Algeria.
authors.forename: Amina
authors.initials: A
authors.lastname: Yakhlef
mesh_terms: D000236:Adenoma / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000556:secondary; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D049950:Hyperparathyroidism, Primary / Q000150:complications / Q000175:diagnosis*; D007717:Knee; D010282:Parathyroid Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000473:pathology
keywords: brown tumor; giant-cell tumor; hyperparathyroidism