Abstract
Cases of psoriasis associated with Tocilizumab (TCZ) are scarce. To describe a new case of TCZ-associated psoriasis and to perform a case-based review of similar cases. We searched Medline/Pubmed, Embase, Scopus, Web of Science, and Directory of Open Access Journals databases using the terms « Tocilizumab » and « Psoriasis » in the French and English literature. We report a 70-year-old woman with a history of Rheumatoid Arthritis who developed Infliximab-induced plaque psoriatic eruption of the soles and palms, that resolved after Infliximab interruption, then relapsed after TCZ relay, and eventually resolved after TCZ interruption. Including our case, we identified 16 cases of TCZ-induced psoriatic eruption. Three (21%) out of 14 patients had a history of cutaneous psoriasis - data were not available for 2 patients. Eight (50%) patients had previously received TNFα antagonists. TCZ was stopped for 10 patients and continued for 4 patients. For the 2 remaining patients, the interval between two injections of TCZ was shortened. All the patients with available follow-up data had an improvement of the eruption within 4 weeks. To conclude, in case of TCZ-induced psoriatic eruption and in light of the published cases, we suggest using topical steroids and reassessing the patient 4 weeks later. If no healing is obtained, we suggest stopping TCZ, and treating the underlying disease with another drug. When no other drug is available, while waiting for more data regarding the value of IL-6 levels, it can be discussed to increase TCZ regimen, as it has been successful for 2 authors. Efficacy assessment of the chosen attitude should not take place before 4 weeks.
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