Fig. 5
Grade 2 psoriasis-like rash consisting of erythematosquamous papules and plaques, occurring 11 months after idelalisib initiation. (a, c) Treatment with topical steroids and 4-week interruption of idelalisib dosing. (b, d) Improvement without resolution after topical steroids and 4-week interruption of idelalisib dosing. Blue arrow indicates psoriasis-like rash that has been partially resolved. Red arrow indicates persistent erythematosquamous plaque