Second malignant tumors in patients with laryngeal carcinoma: diagnosis, treatment, and prevention.

Although the survival rates reported for patients with larynx carcinoma are quite good, there is a risk of developing second malignant tumors (SMT) in this population. The prognosis for SMT is poor, particularly with tumors of the lung and esophagus. The Rochester series was analyzed for larynx stage and specific SMT sites, possible common etiologic factors, and survival of the population as a whole, as well as for the SMT group. From a total of 235 patients with larynx carcinoma and a median follow-up of 10 years, 50 patients with 61 SMT were identified. The overall incidence of developing a SMT was 21%, with 44% of the SMT in the lung. The median survival from SMT diagnosis was 8.74 months and the 2-year survival was only 26%. More than twice as many SMT were observed than would be expected in the population at risk, with an observed-to-expected ratio (OER) for lung SMT of 5.3, and 8 times as many head and neck SMT occurring in our population. These SMT are not treatment related but are most likely caused by a combination of exposure to a common carcinogen, that is, tobacco smoke and alcohol, and to inherent factors, notably "condemned mucosa syndrome." Follow-up procedures, from the perspective of SMT development in larynx cancer patients, are addressed in an attempt to improve survival. The focus of this study is the high incidence of lung primaries that could be mistaken for metastatic disease, which is relatively uncommon in early larynx cancer patients.