title: Hyperparathyroidism with a functioning parathyroid cyst.
abstract: A rare case of primary hyperparathyroidism with a functioning parathyroid cyst in whom Tc-99m MIBI scintigraphy failed to detect a parathyroid tumor is presented. A 62-year-old woman with primary hyperparathyroidism was referred for Tc-99m MIBI imaging to investigate a parathyroid adenoma. Plasma levels of intact parathyroid hormone were elevated to 2250 pg/mL. Neck ultrasonography revealed a cystic lesion measured 30 x 42 x 35 mm on the right inferior side of the thyroid gland. The cystic lesion was successfully removed at surgery. Pathologic diagnosis revealed a benign parathyroid cyst. The cyst contained clear fluid, and was lined by 1 layer of cuboidal epithelial cells. Her postoperative course was uneventful and plasma levels of intact parathyroid hormone normalized after operation.
authors: Department of Nuclear Medicine, Osmangazi University, Eskisehir, Turkey. ilknur_ak@yahoo.com
authors: Ilknur
authors: I
authors: Ak
authors: Mustafa Fuat
authors: MF
authors: Acikalin
mesh_terms: D003560:Cysts / Q000150:complications* / Q000601:surgery*; D005260:Female; D006801:Humans; D006961:Hyperparathyroidism / Q000150:complications* / Q000601:surgery*; D008875:Middle Aged; D016105:Parathyroidectomy; D016896:Treatment Outcome