A 25-year-old woman visited her family doctor for treatment of skin lesions on her left leg, which had developed over the previous 8 weeks. The patient had just returned to the US after working with the Peace Corps in the Amazon rain forest for 3 months. During that time, she slept outside in the jungle without any skin protection—no mosquito netting, no insect repellent, no protective clothing on her extremities. She reported no recent history of trauma, burns, or chemical exposure to the leg, and she had been healthy prior to this skin condition. She reported that she was taking no medications, and was not using alcohol or tobacco.
The lesions started with the development of small pustules on her left leg and ankle. Over the next 3 weeks, these grew into larger, ulcerated lesions. The ulcers persisted for 5 more weeks despite multiple attempts at local topical treatments in Ecuador. No pain or itching were associated with the lesions.
The physical examination revealed a generally healthy woman, remarkable only for the 2 skin ulcers on her left lower leg and ankle (Figure 1 and Figure 2). The patient was afebrile, and had no lymphadenopathy or hepatosplenomegaly.
FIGURE 1
Cutaneous ulceration with indurated border.
Two active ulcers with small healed satellite lesion near the medial malleolus (see arrow).
What is the diagnosis?
How would you treat this condition?