title: Cystic parathyroid adenoma within a multinodular goiter: a rare cause of primary hyperparathyroidism.
abstract: Parathyroid cysts are uncommon lesions that do not have a specific sonographic appearance. We report a rare case of a functionally active cystic parathyroid adenoma as a cause of primary hyperparathyroidism and discuss the difficulties associated with the diagnosis. In this case, the association with a multinodular goiter made preoperative differentiation from thyroid cysts difficult. Demonstration of a high intact parathyroid hormone level in the aspirated cyst fluid was critical for the correct diagnosis.
authors: 3rd Department of Internal Medicine, Division of Endocrinology, Palacky University Hospital, I.P.Pavlova 6, 775 20 Olomouc, Czech Republic.
authors: Milan
authors: M
authors: Halenka
authors: Zdenek
authors: Z
authors: Frysak
authors: Pavel
authors: P
authors: Koranda
authors: Ladislava
authors: L
authors: Kucerova
mesh_terms: D000236:Adenoma / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D000368:Aged; D044963:Biopsy, Fine-Needle; D003937:Diagnosis, Differential; D005260:Female; D006042:Goiter / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D049950:Hyperparathyroidism, Primary / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D010282:Parathyroid Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D013965:Thyroidectomy; D014463:Ultrasonography