PMC9297043_01
Clinical manifestation of GP. In the groin and scrotum, red macules and patches are seen, with well-defined borders, dry surfaces, and overlying desquamation.
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Dermatological examination revealed well-demarcated erythema in the scrotum and bilateral groin with central hyperpigmentation and peripheral dry skin, with a small number of bran-like scales (Figure 1).
The histopathological finding of GP. Histological changes are mainly located in the stratum corneum of the epidermis. It reveals hyperkeratosis, parakeratosis, numerous transparent keratin granules in the stratum corneum (H&E staining, x200).
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Mild perivascular lymphocyte-dominated infiltration (Figure 2).