ABD Dermatopathology

Practice session

A 60-year-old presents with hypopigmented patches on the buttocks for 10 years. Biopsy shows an epidermotropic infiltrate of atypical lymphocytes with cerebriform nuclei in the basal epidermis with little spongiosis, and a band-like upper dermal infiltrate with fibrosis of the papillary dermis. Which disease stage is most likely?

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