A case of Cushing's syndrome is described in a woman who self-treated
psoriasis with a variety of potent topical glucocorticoids over 15 yea
rs. She was successfully weaned off corticosteroids and was treated wi
th alternative anti-psoriatic drugs. The disappearance, nine months la
ter, of most features of Cushing's syndrome, and the normal suppressio
n of cortisol in response to dexamethasone, excluded endogenous hyperc
orticolism. The apparent widespread availability across the counter of
potent corticosteroids is a cause for concern.