ABSTRACT
Objective@# To investigate the diagnosis and treatment of synchronous double primary malignant tumours of the tongue and lung.@*Methods@#A case of adenoid cystic carcinoma（ACC） and lung adenocarcinoma with double primary malignancy was retrospectively analyzed.@*Results@#The tumor of patient′s tongue base gradually grew. MRI showed multiple enlarged lymph nodes on both sides of neck. CT of the chest showed obvious lesions in the anterior basal segment of the right lower lobe. The pathological biopsy of the tongue mass identified ACC, and pathological biopsy of the lung mass identified lung adenocarcinoma. The tongue and lung tumors were both surgically resected, and the tongue defect was repaired at the same time. No residue was found after surgery, and no recurrence was found during the follow-up period. The aesthetic and functional restoration of the lingual region was good.@*Conclusion@#There are few cases of adenoid cystic carcinoma and lung adenocarcinoma with double primary malignancies, and the related diagnosis and treatment are very difficult; the simultaneous removal of double primary malignant tumors may achieve good prognosis.