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Clinical Nuclear Medicine:
doi: 10.1097/RLU.0000000000000293
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Unusual Site of Metastasis Detected With FDG PET/CT in a Case of Recurrent Rectosigmoid Cancer

Yang, Rong-Hsin MD*†; Chu, Yum-Kung MD*†; Li, Wing-Yin MD†‡

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Abstract

Metastatic colon cancers to the oral cavity are unusual, involving a majority of the mandible rather than the oral soft tissues. We describe a rare site of gingival metastasis in a case of rectosigmoid cancer. The patient was a 74-year-old woman who developed swelling and persistent bleeding of the right mandibular gingiva after tooth extraction. A PET/CT using 18F-FDG depicted multiple metastatic lesions in the neck, lung, abdominal wall, and mandibular gingiva. Histologic study of the gingival lesion confirmed the diagnosis of gingival metastasis from colon adenocarcinoma.

Copyright © 2013 by Lippincott Williams & Wilkins

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