Abstract
A 70-year-old man presented to a dermatology clinic in Maine for a skin exam and was noted to have a small (4-cm) targetoid patch on his back. Two weeks earlier, his wife had removed a small tick from the area, and he had received a single 200-mg dose of doxycycline from his primary care physician (PCP). The redness developed after his dose of doxycycline. Since the patient had already received doxycycline, he wondered whether this lesion was caused by something other than the tick bite.What’s your diagnosis?
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