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Anterior view of a patient's left lower leg, revealing ulcerated confluent papillomata present for several years, due to yaws

Treatment for this patient consisted of intramuscular injections of 600 units of procaine benzylpenicillin in oil with aluminium monostearate (PAM). (Source: Photography by Dr. Peter Perine, Centers for Disease Control and Prevention, 1979. Public Health Image Library [PHIL] ID# 3825, Centers for Disease Control and Prevention, Atlanta, Georgia. Public domain.)

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