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Magnetic resonance imaging demonstrated a primary neoplasm situated within the nasal and paranasal cavities, accompanied by an invasion into the intracranial space. Enhanced uptake in the primary tumor and the right cervical lymph node metastasis was detected by the 11C-methionine PET/CT imaging procedure. The 18F-fluorodeoxyglucose PET/CT scan exhibited heightened metabolic activity within the primary tumor and the right cervical lymph node. Still, the substance's physiological absorption by the brain was superimposed on the primary tumor's uptake. A crucial adv