What substance is associated with this presentation?

A 45-year-old female presents with painful lesions on her lower limbs and ears. She is a smoker, and has a history of recreational drug use. Purpuric, necrotic lesions are noted on both lower extremities, in addition to tender purpura on both ears. A biopsy is performed which demonstrates leukocytoclastic vasculitis. Use of which substance is most likely to be associated with this presentation?

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What long-term complication is associated with this condition?

A five-year-old male with a four-day history of fever presents with a new erythematous rash. His mother says he has been coughing and sneezing for the past few days. Examination reveals conjunctivitis, grayish elevations on the buccal mucosa opposite his molar teeth, and a maculopapular rash on his trunk and extremities. Which of the following is a long-term complication of this patient’s condition?

A. Mitral valve disease
B. Subacute sclerosing panencephalitis
C. Cataracts
D. Infertility

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