title: Unusual site of metastasis detected with FDG PET/CT in a case of recurrent rectosigmoid cancer.
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.
authors.affiliation: From the *Departments of Nuclear Medicine, Taipei Veterans General Hospital; †National Yang-Ming University School of Medicine; and ‡Department of Pathology, Taipei Veterans General Hospital, Taipei, Taiwan.
authors.forename: Rong-Hsin
authors.initials: RH
authors.lastname: Yang
authors.forename: Yum-Kung
authors.initials: YK
authors.lastname: Chu
authors.forename: Wing-Yin
authors.initials: WY
authors.lastname: Li
mesh_terms: D000368:Aged; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D064847:Multimodal Imaging; D009362:Neoplasm Metastasis; D049268:Positron-Emission Tomography; D012008:Recurrence; D014057:Tomography, X-Ray Computed
chemical_list: D019788:Fluorodeoxyglucose F18