Skin melanoma and seasonal patterns

Area of Science:

• Dermatology
• Epidemiology
• Environmental Health

Background:

• Epidemiological studies suggest a link between solar ultraviolet radiation (UV-B) and skin melanoma.
• UV-B intensity peaks during summer months, correlating with seasonal patterns in solar radiation.

Purpose of the Study:

• To analyze seasonal patterns of skin melanoma incidence in the United States.
• To investigate the association between solar insolation and melanoma occurrence.
• To explore potential dose-response relationships and biologic action spectra for UV-B in melanoma development.

Main Methods:

• Utilized first-order harmonics (sine curve models) to analyze monthly skin melanoma incidence data.
• Examined data from the Third National Cancer Survey (1969-1971).
• Analyzed seasonal patterns by anatomic site, sex, age, and geographic region for the white population.

Main Results:

• A significant seasonal pattern with a summertime peak in melanoma incidence was observed overall for females.
• This pattern was most pronounced in women under 55 and for melanomas on the extremities in women of all ages.
• A summertime peak was noted for melanomas of the upper extremities in men.

Conclusions:

• The observed seasonal patterns in skin melanoma incidence suggest a potential role for UV-B exposure.
• Further research is needed to determine if these patterns result from UV-B promotion or enhanced summer-season recognition.
• The study highlights the need to understand UV-B's role in melanoma development and dose-response relationships.