title: A case of Riedel's thyroiditis.
abstract: Riedel's thyroiditis is an extremely rare disease that is difficult to diagnose correctly using preoperative diagnostic tools because it can mimic malignant neoplasm or the fibrous variant of Hashimoto thyroiditis during preoperative physical, radiologic, and pathologic examination. We describe here a rare case of Riedel's thyroiditis in an elderly patient and its radiologic characteristics.
authors.affiliation: Thyroid Cancer Center, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Gyu Young
authors.initials: GY
authors.lastname: Pi
authors.forename: Yong Sang
authors.initials: YS
authors.lastname: Lee
authors.forename: Soon Won
authors.initials: SW
authors.lastname: Hong
authors.forename: Hang-Seok
authors.initials: HS
authors.lastname: Chang
authors.forename: Cheong Soo
authors.initials: CS
authors.lastname: Park