Follicular thyroid carcinoma (FTC) is the second most common thyroid malignancy after papillary thyroid carcinoma (PTC). It has a greater tendency than PTC to metastasize to distant organs such as the lung and bone. FTC metastasis to skeletal muscle is extremely rare. Here, we report a 65-year-old woman with large thigh and buttock muscle metastases as the first manifestation of FTC.
From the Department of Nuclear Medicine, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University, Shanghai, China.
Received for publication December 5, 2012; and revision accepted June 11, 2013.
Conflicts of interest and sources of funding: none declared.
Reprints: Quan-Yong Luo, MD, Department of Nuclear Medicine, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University, 600 Yishan Road, Shanghai 200233, China. E-mail: firstname.lastname@example.org.