title: Water-clear cell parathyroid adenoma causing primary hyperparathyroidism in a patient with neurofibromatosis type 1: report of a case.
abstract: Water-clear cell parathyroid adenoma is an exceedingly rare tumor, composed exclusively of tumor cells with abundant foamy cytoplasm. A combination of hyperparathyroidism and neurofibromatosis type 1 (NF1) is also a rare phenomenon. We report an 18-year-old woman with primary hyperparathyroidism caused by water-clear cell parathyroid adenoma in association with NF1. She had renal stones, hypercalcemia, and an elevated plasma level of intact parathyroid hormone. Physical examination revealed a palpable tumor in the right neck, and café-au-lait spots distributed over her entire body. An ultrasound examination showed an isoechoic mass in the right thyroid lobe. Thallium-technetium subtraction scintigraphy showed high thallium accumulation in the right thyroid lobe area. A surgical exploration revealed the palpable mass to be a parathyroid tumor. The pathological features were consistent with water-clear parathyroid adenoma. This is the first reported case of water-clear cell parathyroid adenoma associated with NF1.
authors: Department of Endocrine Surgery, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan.
authors: Hitomi
authors: H
authors: Kodama
authors: Masatoshi
authors: M
authors: Iihara
authors: Takahiro
authors: T
authors: Okamoto
authors: Takao
authors: T
authors: Obara
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D049950:Hyperparathyroidism, Primary / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D009456:Neurofibromatosis 1 / Q000503:physiopathology*; D010282:Parathyroid Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging / Q000503:physiopathology; D014463:Ultrasonography