The association between malignant melanoma and noncutaneous malignancies
Article first published online: 20 JUL 2005
International Journal of Dermatology
Volume 45, Issue 5, pages 529–534, May 2006
How to Cite
Wu, Y.-H., Kim, G. H., Wagner, J. D., Hood, A. F. and Chuang, T.-Y. (2006), The association between malignant melanoma and noncutaneous malignancies. International Journal of Dermatology, 45: 529–534. doi: 10.1111/j.1365-4632.2005.02640.x
- Issue published online: 20 JUL 2005
- Article first published online: 20 JUL 2005
Background Both increases and decreases in the incidence of subsequent malignancies in melanoma patients have been reported. We examined the database of the Indiana University Cancer Center to determine whether there is an association between malignant melanoma and noncutaneous malignancies.
Objective We searched for evidence of noncutaneous malignancies in a cohort of melanoma patients.
Methods Patients with microscopically confirmed malignant melanoma diagnosed between January 1987 and March 2001 were analyzed. This cohort was investigated for noncutaneous malignancies occurring either before or after the diagnosis of melanoma. The standardized incidence ratios (SIR) were calculated as the ratio of the observed to the expected number of patients with second malignancies, and 95% confidence intervals (95% CI) around the SIR were estimated from the cumulative Poisson distribution.
Results A total of 955 patients with melanoma (498 males and 457 females) were documented over the 14-year period. Sixty-nine noncutaneous malignancies were identified in 59 (6.2%) melanoma patients (39 males and 20 females). There was a higher risk of non-Hodgkin's lymphoma (SIR = 1.91; 95% CI, 0.88–3.62) in men and renal cell carcinoma (SIR = 2.41, 95% CI, 0.97–4.97) in men. In female patients, however, there was no higher risk of noncutaneous malignancies.
Conclusions This study did not show a higher risk of prostate cancer, gastrointestinal cancer, leukemia, endometrial cancer, or cancer of the nerve and neuroendocrine systems in melanoma patients. No female patients incurred a higher risk of noncutaneous cancers. The increased risk of non-Hodgkin's lymphoma and renal cell carcinoma in men might be attributed to a mutual carcinogenic exposure, an aberration of cell-mediated immunity, a shared genetic susceptibility, increased medical surveillance among cancer patients, a post-therapy effect after cancer management, or factors not as yet clear. Close monitoring of melanoma patients for signs of second malignancy is warranted.