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Indian J Nucl Med. 2013 Jan;28(1):34-5. doi: 10.4103/0972-3919.116814.

Skeletal muscle metastases as the initial manifestation of an unknown primary lung cancer detected on F-18 fluorodeoxyglucose positron emission tomography/computed tomography.

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Department of Nuclear Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India.


Skeletal muscle metastasis as the initial presentation of the unknown primary lung cancer is unusual. A 65-year-old male patient presented with pain and swelling of the right forearm. Fine needle aspiration of the swelling revealed metastatic squamous cell carcinoma. The patient underwent whole body F-18 fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) to identify the site of the primary malignancy. The authors present PET/CT images showing FDG-avid metastases to the skeletal muscles along with a previously unknown primary tumor in the right lung, in a patient presenting with initial muscular symptoms without any pulmonary manifestations.


F-18 fluorodeoxyglucose; lung cancer; metastases; muscle; positron emission tomography/computed tomography

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