title: Simultaneous malignant tumors in patients with head and neck cancer.
mesh_terms: D004938:Esophageal Neoplasms / Q000628:therapy*; D005260:Female; D006258:Head and Neck Neoplasms / Q000628:therapy*; D006801:Humans; D007573:Jaw Neoplasms / Q000628:therapy*; D008175:Lung Neoplasms / Q000628:therapy*; D008297:Male; D009062:Mouth Neoplasms / Q000628:therapy*; D009378:Neoplasms, Multiple Primary / Q000628:therapy*; D011471:Prostatic Neoplasms / Q000628:therapy*; D012004:Rectal Neoplasms / Q000628:therapy*