A case of localized soft tissue growth located on the lingual aspect of the left mandibular gingiva is reported in a 61-year-old male patient in whom excisional biopsy of the lesion was performed. The histopathologic diagnosis was adenocarcinoma. Further clinical and biopsy examinations taken from several organs indicated the presence of metastatic ad-enocarcinomas in the brain, spleen, lymph nodes, and liver. The oral tumor recurred after repeated surgical removal. Based on histopathological examination and immunoprofiling analysis the primary tumor probably originated in the gastrointestinal tract.
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