Diagnostic dilemma: A woman turned black and blue weeks after starting a new medication

Photos of a pale woman's arms and shins showing very dark blotches of hyperpigmentation on both sets of limbs.

The patient: A 68-year-old woman in the U.S.

The symptoms: Over the course of six weeks, dark patches appeared on the woman's arms and legs. The splotches ranged from a bruise-like dark blue and purple to jet-black.