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Multiple primary tumors are uncommon in patients with squamous cell esophageal cancer. Conventional imaging methods have limitations in detecting those tumors. Although 18-F-fluoro-deoxyglucose-positron emission tomography scanner increases the detection of multiple synchronous tumors in patients with other malignancies, its contribution in patients with squamous cell esophageal cancer has not been assessed as it is not systematically performed. The detection of synchronous skin squamous cell tumors in patients with squamous cell esophageal cancer presents a challenge for making diagnostic and therapeutic decisions. A metastatic tumor leads to palliative management, whereas the diagnosis of a primary skin tumor requires curative treatment of both squamous cell tumors. Pathological evaluation appears crucial in the decision.

Multiple Synchronous Squamous Cell Cancers of the Skin and Esophagus: Differential Management of Primary Versus Secondary Tumor