Melanoma Risk is Increased in Patients with Mycosis Fungoides Compared with Patients with Psoriasis and the General Population*
DOI:
https://doi.org/10.2340/00015555-3704Keywords:
mycosis fungoides, melanoma, psoriasis, phototherapy, hazard ratio, standardized incidence ratioAbstract
Patients with mycosis fungoides (MF) are thought to be at increased risk of melanoma. However, studies addressing surveillance-bias and treatments as a possible confounder are lacking. This retrospective study compared the prevalence and risk of melanoma between 982 patients with MF, and 3,165 patients with psoriasis attending tertiary cutaneous-lymphoma/psoriasis clinics during 2009 to 2018. Melanoma was diagnosed in 47 patients with MF (4.8%; 43 early-stage) and in 23 patients with psoriasis (0.7%) (odds ratio 6.6, p?<?0.0001). In 60% of patients, MF/psoriasis preceded melanoma diagnosis. Hazard ratio (HR) for a subsequent melanoma in MF vs psoriasis was 6.3 (95% confidence interval (95% CI) 3.4?11.7, p?<?0.0001). Compared with the general population, melanoma standardized incidence ratios were 17.5 in patients with MF (95% CI 11.0?23.9, p?<?0.0001), and 2.2 (95% CI 0.6?3.8, p?=?0.148) in patients with psoriasis. Narrow-band ultraviolet B was not a contributory factor (HR 1.15, 95% CI 0.62?2.14, p?=?0.66). These findings add evidence that patients with MF have a significantly higher risk of melanoma, not only compared with the general population, but also compared with patients with psoriasis. This comorbidity may be inherent to MF.Downloads
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Copyright (c) 2020 Shany Sherman, Noa Kremer, Adam Dalal, Efrat Solomon-Cohen, Einav Berkovich, Yehonatan Noyman, Maya Ben-Lassan, Assi Levi, Lev Pavlovsky, Hadas Prag Naveh, Emmilia Hodak, Iris Amitay-Laish
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