Cigarette Smoking and Malignant Melanoma

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Abstract
In a prospective study of 178 patients with malignant melanoma, a subset of 33 patients (18.5%) was identified to be at significantly higher risk for developing metastatic disease based on history of cigarette smoking. Patients in this high-risk group (current smokers with a >15 pack-years of smoking history) had two-year disease-free survival rates of 74.2%, versus 92.3% for the remaining patients (p =0.008). A possible explanation of this phenomenon is that chronic smoking diminishes host defense mechanisms and results in an adverse effect on the biologic behavior of established malignant melanomas.