You are here
JAMA Dermatology reports that psoriasis is associated with a slightly increased risk of cancer, particularly keratinocyte cancer and lymphomas.
A systematic review and meta-analysis of 112 studies including more than 2 million patients, also shows no increase in when psoriasis is treated with biologic agents, nor was psoriatic arthritis associated with an increased risk of cancer.
The overall prevalence of cancer in patients with psoriasis was 4.78% (95% CI, 4.02%-5.59%), with an incidence rate of 11.75 per 1000 person-years (95% CI, 8.66-15.31) and a risk ratio (RR) of 1.21 (95% CI, 1.11-1.33).
This risk was attibutable to keratinocyte cancer (RR, 2.28; 95% CI, 1.73-3.01), lymphomas (RR, 1.56; 95% CI, 1.37-1.78), lung cancer (RR, 1.26; 95% CI, 1.13-1.40), and bladder cancer (RR, 1.12; 95% CI, 1.04-1.19).
No increased risk of cancer for patients with psoriasis treated with biologic agents was found (RR, 0.97; 95% CI, 0.85-1.10).
Psoriatic arthritis was not associated with increased risk of cancer overall (RR, 1.02; 95% CI, 0.97-1.08).