title: Tc-99m sestamibi localization of an ectopic mediastinal parathyroid tumor in a patient with primary hyperparathyroidism.
abstract: A 50-year-old woman presented with pain and tenderness in the right flank. Urogram and ultrasound demonstrated the presence of an 8-mm calculus in the right kidney. There were persistently elevated serum calcium levels ranging from 10.7-11.4 mg/dL (normal range: 8.5-10.5) and borderline low serum phosphate levels of 2.4-2.9 mg/dL (normal range 2.5-4.5). Serum albumin levels were normal. The patient's parathormone levels were elevated and a diagnosis of primary hyperparathyroidism was made. An MRI of the neck failed to reveal evidence of parathyroid pathology. Tc-99m sestamibi imaging demonstrated no abnormal parathyroid tissue in the neck, but clearly showed an abnormal focus in the anterior mediastinum.
authors.affiliation: Department of Nuclear Medicine, Mafraq Hospital, Abu Dhabi, United Arab Emirates. bruckek_a@yahoo.com
authors.forename: Bruce K
authors.initials: BK
authors.lastname: Adams
authors.forename: Rita T
authors.initials: RT
authors.lastname: Devi
authors.forename: Zuhair Y
authors.initials: ZY
authors.lastname: Al-Haider
mesh_terms: D002828:Choristoma / Q000150:complications* / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D006961:Hyperparathyroidism / Q000000981:diagnostic imaging* / Q000209:etiology*; D008479:Mediastinal Neoplasms / Q000150:complications / Q000175:diagnosis / Q000000981:diagnostic imaging*; D008875:Middle Aged; D010280:Parathyroid Glands; D010282:Parathyroid Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging