Still, the research that does exist provides plenty of hints about risk. “Large epidemiological studies showed that recreational activities such as sun exposure on the beach or during water sports were associated with an increased risk of basal cell carcinoma, whereas skiing has been shown to be at increased risk for squamous cell carcinoma,” according to a 2008 report on outdoor sports and skin cancer (Clin Dermatol. 2008 Jan-Feb;26[1]:12-5).
“Risk factors of cutaneous melanoma, such as the number of melanocytic nevi and solar lentigines, have been found to be more frequent in subjects practicing endurance outdoor sports. An increased risk for cutaneous melanoma may be assumed for these athletes,” Dr. Adams commented.
Another study, this one published in 2006, found more atypical melanocytic nevi, solar lentigines, and lesions suggestive of nonmelanoma skin cancer in marathon runners, compared with a control group, and the risk was associated with the level of training intensity. The control subjects were more sensitive to the sun and had more common melanocytic nevi (Arch Dermatol. 2006 Nov;142[11]:1471-4).
Counseling about sunscreen may actually work
One strategy to reduce sun exposure is to advise athletes to avoid peak sun hours. However, “the key to caring for the athletes is not only recognizing that their sport may play a role in their disease but also realizing that your therapeutic approach must be tailored to minimize disruption to their practices and competitions,” Dr. Adams said.