title: Unusual presentation in a case of primary hyperparathyroidism.
abstract: This report describes a case of classic severe primary hyperparathyroidism (PH) with clinical presentation that is very infrequent nowadays, which was osteitis fibrosa cystica. As bone scintigraphy demonstrated multiple areas of increasing uptake associated with hypercalcemia, a thorough investigation was conducted to exclude the neoplasms which most frequently are responsible for bone secondarisms. A fludeoxyglucose (FDG) positron emission tomography/CT demonstrated diffuse and multiple foci of increased FDG uptake and a focal uptake at the left thyroid region. Parathyroid function was studied, revealing unexpectedly high parathyroid hormone (PTH) levels. Further tests confirmed the diagnosis of PH and localized a parathyroid adenoma in the lower left side.
authors.affiliation: Medicina Interna 1 B, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milano, Italy.
authors.forename: Lorena
authors.initials: L
authors.lastname: Airaghi
authors.forename: Giuseppina
authors.initials: G
authors.lastname: Pisano
authors.forename: Edoardo
authors.initials: E
authors.lastname: Pulixi
authors.forename: Riccardo
authors.initials: R
authors.lastname: Benti
authors.forename: Marina
authors.initials: M
authors.lastname: Baldini