A Functional Parathyroid Cyst from the Hemorrhagic Degeneration of a Parathyroid Adenoma

Autor: Yugo Shibagaki, Masahiko Yazawa, Junki Koike, Tomo Suzuki, Masataka Hasegawa, Atsuko Uehara, Yutaro Yamamoto, Kenichiro Koitabashi
Rok vydání: 2020
Předmět:
Zdroj: Internal Medicine
ISSN: 1349-7235
0918-2918
DOI: 10.2169/internalmedicine.3319-19
Popis: A 77-year-old man with a history of hypertension, prostate hyperplasia, and urolithiasis was admitted for acute kidney injury caused by hypercalcemia. Neck ultrasonography showed a large cyst adjacent to the right lower thyroid lobe. Although a 99mtechnetium sestamibi scan was negative, an extremely high intracystic intact parathyroid hormone level suggested that the cyst had a parathyroid origin and that a functional parathyroid cyst was present. Immunohistochemical staining for the calcium-sensing receptor (CaSR) after right lower parathyroidectomy revealed CaSR-positive cells lining the cyst, indicating that the functional parathyroid cyst had originated from the hemorrhagic degeneration of a parathyroid adenoma.
Databáze: OpenAIRE