Trauma-induced cutaneous pigmentation from tetracycline: a case report.

Tetracycline is well known to cause pigmentation of various body tissues, such as teeth, bone, lunulae, conjunctivae, and lymph nodes. It has not been reported to cause discoloration of the skin, unlike its semisynthetic derivative, minocycline. We report an 18-year-old girl who developed lower extremity pigmentation in areas of trauma during treatment with tetracycline.