This 16-year-old boy with obesity (BMI 40), insulin resistance, and gynecomastia presented with a 6-mo hx of thickened, hyperpigmented, scaly reticulate eruption on the chest, back, and abdomen. A scraping for fungus was negative. What is the diagnosis?
Terra firma-forme dermatosis
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Pityriasis (tinea) versicolor
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Scabies infestation
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Papillomatosis (CARP) + acanthosis nigricans
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Tinea corporis (ringworm)
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