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Intense Muscle Activity Due to Polymyositis Incidentally Detected in a Patient Evaluated for Possible Malignancy by FDG PET/CT Imaging

Bai, Xia, MD*; Tie, Ning, MD; Wang, Xuemei, MD, PhD*; Zhao, Jianmin, MD, PhD

doi: 10.1097/RLU.0000000000001727
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A 42-year-old woman suffered shortness of breath and whole-body pain, more prominent in both thighs. After the initial assessment, a paraneoplastic syndrome was considered clinically, and FDG PET/CT was performed to search culprit malignancy. The images did not reveal any focal lesion typical of solid hypermetabolic malignancy. Instead, diffuse increased muscle activity was noted in most musculatures, with some focally intense. The findings were suggestive of polymyositis, which was subsequently confirmed.

From the Departments of *Nuclear Medicine, †Rheumatology and Immunology, and ‡Orthopedic Surgery, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, People’s Republic of China.

Received for publication April 27, 2017; revision accepted May 1, 2017.

Conflicts of interest and sources of funding: This investigation was partially supported by a grant from the Inner Mongolia Government: Multimodal Imaging for Brucellar Spondylitis in the Early Diagnosis and Prognosis.

Correspondence to: Xuemei Wang, MD, PhD, Department of Nuclear Medicine, The Affiliated Hospital of Inner Mongolia Medical University, #1 Tongdao North Street, Huimin District, Hohhot, Inner Mongolia 010050, People’s Republic of China. E-mail: wangxuemei201010@163.com; or Jianmin Zhao, MD, PhD, Department of Orthopedic Surgery, The Affiliated Hospital of Inner Mongolia Medical University, #1 Tongdao North Street, Huimin District, Hohhot, Inner Mongolia 010050, People’s Republic of China. E-mail: nmzjmin@163.com.

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