Interstitial granulomatous dermatitis with arthritis (IGDA) is a rare disease that was first described by Ackerman1 in 1993. Fewer than 70 cases have been reported in the literature,2 and specific therapies are not available. We report here a case of severe recalcitrant IGDA that was successfully treated with ustekinumab.
Correspondence: Dr Leloup, Department of Dermatology, 1 Place Alexis Ricordeau, Nantes University Hospital, 44000 Nantes, France (firstname.lastname@example.org).
Conflict of Interest Disclosures: None reported.
Additional Contributions: We are indebted to E. Cassagnau, MD, pathologist at Nantes University Hospital, France.