AUG 13, 2026 · JOURNAL ARTICLE
A case of Merkel cell carcinoma mimicking cellulitis during Janus kinase inhibitor therapy
Journal of Cutaneous Immunology and Allergy
A single case report with atypical clinical presentation and mechanistic speculation; describes one patient's course without a control group or comparative data, raising a signal rather than establishing causation.
Reported
Patient age74 years
Tofacitinib dose10 mg/day
Duration of JAK inhibitor exposure4 years prior to MCC presentation