Exploring cutaneous lymphoproliferative disorders in the wake of COVID‐19 vaccination

Abstract

Abstract Background Individual reports have described lymphoproliferative disorders (LPDs) and cutaneous lymphomas emerging after administration of the COVID‐19 vaccine; however, the relationship between reactions and vaccine types has not yet been examined. Objective Determine if there are cases of cutaneous LPDs associated with certain COVID‐19 vaccines and their outcomes. Methods We analysed PubMed, the Vaccine Adverse Events Reporting System (VAERS), and our database for instances of biopsy‐proven LPDs following COVID‐19 vaccines. Results Fifty cases of biopsy‐proven LPDs arising after COVID‐19 vaccination were found: 37 from medical literature, 11 from VAERS and two from our institution. Geographical distribution revealed the most cases in the United States, Italy, and Greece, with single cases in Spain, Colombia, Canada, Japan, and Romania. The average age of patients was 53; with a slight male predominance (male‐to‐female ratio of 1.5:1). The Pfizer‐BioNTech vaccine was associated with LPDs in 36/50 (72%) cases, aligning with its 70% share of the global vaccine market. Histopathology revealed CD30+ in 80% of cases. The most prevalent form of LPD was lymphomatoid papulosis (LyP, 30%). All reported cases produced favourable outcomes (either complete or near‐complete remission). Therapeutic approaches ranged from observation to treatment with steroids, methotrexate, or excision. Conclusion LPDs after COVID‐19 vaccination appear in the context of the same vaccines (proportionally to their global market shares), share clinical and pathological findings, and have indolent, self‐limited character.