“…Oral prednisone treatment was restarted with good clinical response. Cases of periostitis in patients with PAN (often localised PAN) have been reported, [1][2][3][4][5][6][7] although mostly in older publications. The periosteal reaction is most often found in the lower limbs, [1][2][3][4][5][6] and may or may not be accompanied by cutaneous lesions.…”