Hanna Eriksson1,2, Kari Nielsen3,4,5, Ismini Vassilaki6, Jan Lapins7,8, Rasmus Mikiver9,10, Johan Lyth11, Karolin Isaksson12,13. 1. Department of Oncology and Pathology, Karolinska Institutet, 171 76 Stockholm, Sweden. 2. Cancer Theme, Department of Oncology, Skin Cancer Center, Karolinska University Hospital, 171 76 Stockholm, Sweden. 3. Department of Clinical Sciences, Dermatology, Lund University, 221 84 Lund, Sweden. 4. Department of Dermatology, Skane University Hospital, 221 85 Lund, Sweden. 5. Department of Dermatology, Helsingborg Hospital, 251 87 Helsingborg, Sweden. 6. Department of Pathology and Cytology, Karolinska University Laboratories, 171 76 Stockholm, Sweden. 7. Department of Medicine, Unit of Dermatology, Karolinska Institutet, 171 76 Stockholm, Sweden. 8. Department of Dermatology, Skin Cancer Center, Karolinska University Hospital, 171 76 Stockholm, Sweden. 9. Regional Cancer Center South East Sweden, 581 85 Linköping, Sweden. 10. Department of Clinical and Experimental Medicine, Linköping University, 581 83 Linköping, Sweden. 11. Department of Health, Medicine and Caring Sciences, Linköping University, 581 83 Linköping, Sweden. 12. Department of Clinical Sciences, Surgery, Lund University, 221 84 Lund, Sweden. 13. Department of Surgery, Kristianstad Hospital, 291 33 Kristianstad, Sweden.
Abstract
BACKGROUND: The incidence of invasive cutaneous melanoma (CM) is increasing in Sweden. The aim was to present age- and sex-specific trends of the age-standardised incidence and the average annual percentage change (AAPC) for in situ and invasive CM. METHODS: Joinpoint regression models were used to analyse data from the Swedish Cancer Register and the Swedish Melanoma Registry 1997-2018 (N = 35,350 in situ CM; 59,932 CM). RESULTS: The AAPC of CM for women was 4.5 (4.1-5.0; p < 0.001) for the period 1997-2018. For men, the APCC was 4.2 (3.0-5.4; p < 0.001), with a significantly higher annual percentage change (APC) for the period 2000-2018 (5.0; 4.6-5.4; p < 0.001) compared to 1997-1999. An increasing annual incidence of CM ≤ 0.6 mm and 0.7 mm Breslow tumour thickness was found for men with a significant incidence shift for the period 2006-2015, respectively. Similarly for women, with a significantly higher APC for CM ≤ 0.6 mm from 2005. The incidence of intermediate thick CM (2.1-4.0 mm) has not increased since 2011. The incidence of CM > 4.0 mm has been increasing among both sexes, with a significantly lower APC among women from 2005. CONCLUSIONS: The incidence of in situ and low-risk CM ≤ 1.0 mm in tumour thickness has been rising among both sexes since the 2000s.
BACKGROUND: The incidence of invasive cutaneous melanoma (CM) is increasing in Sweden. The aim was to present age- and sex-specific trends of the age-standardised incidence and the average annual percentage change (AAPC) for in situ and invasive CM. METHODS: Joinpoint regression models were used to analyse data from the Swedish Cancer Register and the Swedish Melanoma Registry 1997-2018 (N = 35,350 in situ CM; 59,932 CM). RESULTS: The AAPC of CM for women was 4.5 (4.1-5.0; p < 0.001) for the period 1997-2018. For men, the APCC was 4.2 (3.0-5.4; p < 0.001), with a significantly higher annual percentage change (APC) for the period 2000-2018 (5.0; 4.6-5.4; p < 0.001) compared to 1997-1999. An increasing annual incidence of CM ≤ 0.6 mm and 0.7 mm Breslow tumour thickness was found for men with a significant incidence shift for the period 2006-2015, respectively. Similarly for women, with a significantly higher APC for CM ≤ 0.6 mm from 2005. The incidence of intermediate thick CM (2.1-4.0 mm) has not increased since 2011. The incidence of CM > 4.0 mm has been increasing among both sexes, with a significantly lower APC among women from 2005. CONCLUSIONS: The incidence of in situ and low-risk CM ≤ 1.0 mm in tumour thickness has been rising among both sexes since the 2000s.