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To assess tocilizumab (TCZ) as an emergent treatment for corticosteroid-resistant active Graves’ orbitopathy (GO). We conducted a single-centre prospective study. We assessed TCZ in patients with active corticosteroid-resistant GO. Each patient received intravenous TCZ every four weeks until symptom stabilization. Our primary outcome was GO activity evaluated by the clinical activity score (CAS). The secondary outcomes included variation in thyroid-stimulating immunoglobulin (TSI). We included ten patients. Three patients had compressive neuropathy with visual field impairment and vision loss. CAS improved significantly in 100% of the patients included in the analysis, with a decrease in the mean CAS of 4.5 ± 1.2 points ( p  = .003). There was a significant decrease in the TSI after therapy, from 21.7 ± 22.9 at baseline to 4.0 ± 3.3 ( p  = .006). A mean of three infusions was necessary to drastically decrease the TSI amount. The baseline mean before TCZ was 4.7 ± 1.2 and the final mean after TCZ IV infusion was 0.2 ± 0.4. Our study showed the efficiency of TCZ in patients with GO resistant to corticosteroid therapy, as shown in previous studies. Our present work adds two important pieces of information: TCZ might be particularly useful for GO with compressive neuropathy and it is efficient regardless of initial TSI level. Considering the numerous advantages over steroids (high response rate and lower rate of adverse events), further randomized controlled trials should be conducted to assess the possible place of TCZ as a first-line treatment.

Treatment of corticosteroid-resistant Graves’ orbitopathy with tocilizumab: a single-centre prospective study