A 56-year-old woman with secondary hyperparathyroidism was referred for preoperative localization of hyperfunctioning parathyroid lesions. 99mTc-MIBI dual-phase and SPECT/CT parathyroid scan showed multiple focal activities behind the thyroid and in the anterior mediastinum, diagnosed as parathyroid hyperplasia. However, the histopathological findings proved them to be hyperplastic parathyroid glands and remnant thymic tissue after parathyroidectomy and unnecessary thoracotomy, respectively.
From the Department of Nuclear Medicine, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China.
Received for publication August 12, 2018; revision accepted September 4, 2018.
Conflicts of interest and sources of funding: This study was supported by Zhejiang Province Medical Health Science Foundation (grant no. 2016KYB099).
Correspondence to: Jun Zhang, MD, Department of Nuclear Medicine, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Rd, Hangzhou, Zhejiang Province, 310003, People's Republic of China. E-mail: firstname.lastname@example.org.