<unk>  is an abscess (collection of neutrophils) in the stratum corneum of the epidermis due to the infiltration of neutrophils from papillary dermis into the epidermal stratum corneum. They are a cardinal sign of psoriasis where they are seen in the hyperkeratotic and parakeratotic areas of the stratum corneum.<unk><unk> es are not seen in seborrheic dermatitis. It is named for William John<unk>  (1863–1908).
Munro's microabscess
Bezold's abscess
Hill–Sachs lesion
field of Fungal infection
Janeway lesion
Preauricular sinus and cyst
Roth's spot
Butcher's wart