A 30-year-old man presents with a 2-week history of pruritic skin lesions involving the axillary and groin areas. The lesions have been recurring over the past 7 years. The rash is usually exacerbated by exposure to heat or sweating. Previous treatments, including topical glucocorticoids, antibiotics, and antifungals, have provided only minimal or partial relief. His brother has similar symptoms. Examination of the areas reveals multiple tender, erythematous, macerated patches, with erosions and fissures.
The most likely diagnosis is
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Tinea cruris
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Hidradenitis suppurativa
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Benign familial chronic pemphigus
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Intertrigo
Answer on page 1158
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