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FIGURE 21-3. Psoriasis. Plaques with scales seen at the front of the knee. (Reprinted with permission from Bickley LS. Bate's Guide to Physical Examination and History Taking. 8th Ed. Philadelphia: Lippincott Williams & Wilkins, 2003.)
FIGURE 21-3. Psoriasis. Plaques with scales seen at the front of the knee. (Reprinted with permission from Bickley LS. Bate's Guide to Phy...
<bold><italic>Figure 14.69.</bold></bold> Classic plaque with scales of psoriasis.
<bold><italic>Figure 14.70.</bold></bold> Nail pitting of psoriasis.
Guttate psoriasis: multiple small scaling lesions following strep throat infection
Guttate psoriasis: scalp lesions noted in patient in previous photo
Guttate psoriasis: multiple small scaling lesions present for weeks
Psoriasis. Psoriasis is the prototype of psoriasiform epidermal hyperplasia. A patient with psoriasis shows large, confluent, sharply demarcated, erythematous plaques on the trunk.
Psoriasis. Psoriasis is the prototype of psoriasiform epidermal hyperplasia. A patient with psoriasis shows large, confluent, sharply dem...
Psoriasis. Psoriasis is the prototype of psoriasiform epidermal hyperplasia. Microscopic examination of a lesion demonstrates that the rete ridges are uniformly elongated, as are the dermal papillae, giving an interlocking pattern of alternately reversed "clubs." The dermal papillae are edematous and reside beneath a thinned epidermis (suprapapillary thinning) with striking parakeratosis. The parakeratosis is the scale observed clinically.
Psoriasis. Psoriasis is the prototype of psoriasiform epidermal hyperplasia. Microscopic examination of a lesion demonstrates that the re...
Psoriasis. The clubbed papillae contain tortuous dilated venules. The prominent venules are part of the venulization of capillaries, which may be of histogenetic importance in psoriasis. The papilla to the right has one cross-section of its superficial capillary venule loop, which is normal. The papilla in the center shows numerous cross-sections of its venule, indicating striking tortuosity.
Psoriasis. The clubbed papillae contain tortuous dilated venules. The prominent venules are part of the venulization of capillaries, which...
Psoriasis. Neutrophils migrate into the epidermis, emerging from the venulized capillaries at the tips of the dermal papillae. They migrate to the upper stratum spinosum and stratum corneum (arrows). In some forms of psoriasis, pustules are common clinical lesions.
Psoriasis. Neutrophils migrate into the epidermis, emerging from the venulized capillaries at the tips of the dermal papillae. They migrat...
Plaques with scales on the front of a knee (in psoriasis)
Scalp psoriasis on the scalp of a young woman