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Table 3 History or pre-existing non-melanoma malignant skin lesions prior to metastatic melanoma diagnosisa

From: The occurrence of non-melanoma malignant skin lesions and non-cutaneous squamous-cell carcinoma among metastatic melanoma patients: an observational cohort study in Denmark

Outcome Overall (N = 2814) Stage IV at initial diagnosis (N = 1313) Progressed to stage IV (N = 1501)
n % (95 % CI) n % (95 % CI) n % (95 % CI)
cuSCC or BCC 243 8.6 (7.6-9.7) 82 6.2 (5.0-7.7) 161 10.7 (9.2-12.4)
Bowen’s disease 21 0.7 (0.5-1.1) 11 0.8 (0.4-1.4) 10 0.7 (0.3-1.2)
KA 19 0.7 (0.4-1.0) 9 0.7 (0.3-1.2) 10 0.7 (0.3-1.2)
AK 109 3.9 (3.2-4.6) 36 2.7 (2.0-3.7) 73 4.9 (3.9-6.0)
  1. aAbbreviation: BCC, basal cell carcinoma; cuSCC, cutaneous squamous cell carcinoma; AK, actinic keratosis; and KA, keratoacanthoma