An 80-year-old sedentary man is admitted on your hospital service for repair of a ventral hernia. During the physical examination, you note a symmetrical eruption along both inguinal creases. The patient says the eruption has been present for several months but is nonpruritic. You suspect erythrasma.
1. List the factors that can provoke erythrasma.
2. What are the primary and secondary lesions you may find with erythrasma?
3. What other common conditions may be confused with erythrasma on physical examination?
4. How would you establish the diagnosis of erythrasma?
5. What treatment could be offered to this patient?
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