“…At first the possibility of a paradoxical reaction to anti-TNFα treatment was considered, since adalimumab is one of the most promising therapeutic choices for PG, rarely it also may induce inflammatory immune-mediated skin manifestations. 31,32 PG has been recently described as part of some genetic autoinflammatory conditions such as PAPA (pyogenic arthritis, PG and acne), PASH (PG, acne and suppurative hidradenitis), and PAPASH (pyogenic arthritis, acne, PG and suppurative hidradenitis), these are all characterized by cutaneous involvement with a neutrophilic infiltrate, an inflammasome impairment, and an overproduction of IL-1. 33 In our patient canakinumab induced a rapid and satisfactory response, with bone pain and PG resolution, inflammatory markers normalization, and an almost complete radiological bone lesions recovery.…”