Which histological feature is the hallmark of psoriasis?
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Correct answer: Acanthosis, parakeratosis, and Munro microabscesses
Psoriasis is characterized by regular acanthosis (rete ridge elongation), parakeratosis containing neutrophils (Munro microabscesses), and a diminished or absent stratum granulosum. These features reflect the rapid epidermal turnover seen in the disease.
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