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Updated: Aug 8, 2026

Cell Population Analyses During Skin Carcinogenesis
Published on: August 21, 2013
Multiple basal cell carcinoma. A clinical evaluation of risk factors
P Wallberg1, T Kaaman, M Lindberg
1Department of Dermatology, Karolinska Institute, Södersjukhuset, Stockholm, Sweden.
Abstract:
Basal cell carcinoma (BCC) is the most common malignant skin tumour. There is evidence that the number of patients who develop more than one basal cell carcinoma (mBCC) is increasing. The aim of this study was to elucidate possible risk factors for developing mBCC. Among twelve risk factors considered, skin tumour among relatives was the strongest, with an odds ratio of 10.9 (p < 0.001). The second strongest risk factor was sunburn after the age of 60, odds ratio 4.4 (p < 0.001). The results suggest that the presence of skin tumour in the family and sunburn after age 60 are independent factors associated with mBCC. To our knowledge this has not previously been reported.
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