Indian Journal of Nuclear Medicine
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Year : 2020  |  Volume : 35  |  Issue : 3  |  Page : 232-234

Tiger man Sign-F-18 FDG PET CT scan pattern in muscular and cutaneous sarcoidosis: A case report and literature survey

1 Department of Nuclear Medicine and PET CT, Manipal Hospital, Dwarka, New Delhi, India
2 Department of Pathology, Manipal Hospital, Dwarka, New Delhi, India

Correspondence Address:
Dr. Ankur Pruthi
Department of Nuclear Medicine and PET CT, Manipal Hospital, Sector.6, Dwarka, New Delhi - 110 075
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijnm.IJNM_67_20

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Sarcoidosis is a chronic granulomatous disorder of unknown etiology which primarily affects the respiratory system. However, 0.5%–2.5% of patients with sarcoidosis show muscle involvement, namely sarcoid myopathy. F-18 Fluorodeoxyglucose positron-emission tomography (F-18 FDG PET) has become an important component of the diagnostic algorithm of these patients, owing to its ability to assess disease extent and identify occult sites of disease involvement and guiding sites of biopsy. Awareness of pattern of FDG uptake in sarcoid myopathy not only helps in identifying muscular involvement in already known cases but also helps in the initial diagnosis of sarcoidosis as in the present case.

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