Incidence Trends of Melanoma of the Lower Limbs and Hips in the United States: A Surveillance, Epidemiology, and End Results Analysis 2000-2019

Background/Aim: No specific studies on the changes in the incidence of melanoma in the lower limbs and hips have been performed. This article aimed to examine trends in incidence rates of melanoma of the lower extremities in the U.S. Patients and Methods: Data from the SEER program provided by the National Cancer Institute were used to examine trends in melanoma incidence from 2000 to 2019. Data analysis was performed from October to December 2022. Results: A total of 192,327 cases of melanoma of the lower limbs and hips were diagnosed from 2000 to 2019 and included in our study. The incidence rate increased from 9.78 to 13.65 cases per 100,000 personyear and by an average annual percent change (AAPC) of 2% (95%CI=1.4-2.9%). The incidence increased by an AAPC of 2.1% in men and 1.7% in women. The incidence among people under 50 remained stable but increased among those over 50 years. Localized stage disease was the only stage where a continuously increasing incidence was observed, with an AAPC of 1.7% (95%CI=0.9-2.5%). Lentiginous melanoma showed the highest incidence trend rate with an AAPC of 2.3% (95%CI=1.0-3.5%). Conclusion: The incidence rate of melanoma in the lower limbs and hips increased between 2000 and 2019, with a higher incidence in men, reversing the previously described trend of higher incidence among women. However, incidence among people under 50 remained stable, suggesting the efficacy of prevention campaigns in this population.