Psoriasis
LEGEND
An increase in the width of the base of the epidermal ridges is observed, also known as clubbed rete ridges due to their resemblance to a golf club.
The term psoriasiform acanthosis may be used when there is thickening of the entire epidermis with elongation of the rete ridges resembling those seen in psoriasis.
Epidermal ridges elongated in a regular fashion (all symmetrical in both width and length)
Psoriasis
LEGEND
Elongation and widening of the epidermal ridges that eventually fuse at their base
Psoriasis
LEGEND
Dilated vessels in the papillary dermis near the surface clinically correspond to Auspitz sign
Thinning of the suprapapillary plates of the epidermis brings the dilated papillary dermal vessels closer to the skin surface
Hypogranulosis resulting in thinning or complete absence of the epidermal granular layer
Psoriasis
LEGEND
Thinning of the suprapapillary epidermal plates bringing the dilated vessels of the papillary dermis closer to the skin surface
Psoriasis
LEGEND
Thinning of the suprapapillary epidermal plates bringing the dilated vessels of the papillary dermis closer to the skin surface
Psoriasis
LEGEND
Parakeratosis is characterized by keratinocytes of the stratum corneum (also called corneocytes) retaining their nuclei.
Compact, layered parakeratotic hyperkeratosis
Psoriasis
LEGEND
Spongiform pustule of Kogoj, which corresponds to an intraepidermal collection of neutrophils
Psoriasis
LEGEND
Munro microabscess, which corresponds to an intracorneal collection of neutrophils
Psoriasis
Munro microabscess, which corresponds to an intracorneal collection of neutrophils
