Background: Patients with cutaneous malignant melanoma (CMM) are at increased risk of non-melanoma skin cancers (NMSCs) and possibly precancerous lesions.
Objectives: To analyse the association between CMM and not only NMSCs but also precursor lesions, actinic keratosis (AK) and Bowen disease (BD).
Materials & Methods: The Finnish Cancer Registry data was used to calculate the age-standardized incidence ratio during 2000-2013 for basal (BCC) and squamous (SCC) cell carcinoma in patients with CMM. All tissue material collected from 70,420 subjects during 2000-2013 and reposited in the Biobank of Eastern Finland was used to calculate the age-standardized prevalence of BCC, SCC, BD and AK in CMM patients.
Results: In both genders, the age-standardized incidence ratio of BCC and SCC was increased in CMM patients. The age-standardized prevalence of NMSCs and precursor lesions was higher in patients with CMM than in those without CMM, and was higher in CMM patients with immunosuppression (IS) than in those without IS. The association of M-Snomed subtypes, lentigo maligna (LM), melanoma in situ (MIS) and malignant melanoma (MM) with AK and/or BD was stronger than with BCC. LM revealed the highest association with the combination of AKBD-SCC. Male subjects showed a higher age-standardized prevalence of CMM, MM and BCC than females, but the opposite was observed for AK.
Conclusion: Melanoma increases the risk of NMSCs, and IS may enhance this risk. Both malignant and in situ subtypes of melanoma associate with not only BCC and SCC, but also precancerous lesions.
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| http://dx.doi.org/10.1684/ejd.2022.4221 | DOI Listing |
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