Abnormal skin changes and unilateral vision loss after a tuberculin skin test.

KEY POINTS A healthy 20-year-old woman had a tuberculin skin test (TST), as required by her employer. Over 2 days, she developed a necrotizing reaction with a 1 cm central erosion surrounded by about 6 cm of induration with hyperpigmentation at the site of the TST ([Figure 1][1]). Six days later,