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Psoriasis and seborrheic dermatitis are relatively common inflammatory skin diseases, which are specifically manifested as erythema and desquamation
.
These two diseases have common clinicopathological characteristics, but there are some obvious differences when they are carefully examined
Psoriasis and seborrheic dermatitis are relatively common inflammatory skin diseases, which are specifically manifested as erythema and desquamation
Seborrheic dermatitis is characterized by red, peeling, and greasy areas on the skin, the most common being the scalp, nasolabial folds, ears, eyebrows, and chest
Dermoscopy is a valuable tool for evaluating pigmented skin lesions, and it has greatly improved the clinical diagnosis of almost all pigmented skin tumors
The characteristic features of the vascular system under dermoscopy are three valuable vascular features that
The red dots and red balls represent the twisted and dilated blood vessels in the elongated dermal papilla, which are characteristic histological features of psoriasis
Figure 1.
Figure 2.
Figure 2 Schematic representation of the dermatoscope types and basic histological features
.
The blood vessels in the dermal papilla of patients with psoriasis are twisted and expanded, showing red dots, red balls (a, the red arrow represents a right-angle view), glomerular blood vessels (b, the red arrow represents a right-angle view), and a twisted red ring (c: yellow The arrow represents the tangent view)
Figure 2.
Literature source: Kim GW, Jung HJ, Ko HC, Dermoscopy can be useful in differentiating scalp psoriasis from seborrhoeic dermatitis.
Literature source: Literature source: Kim GW, Jung HJ, Ko HC, Dermoscopy can be useful in differentiating scalp psoriasis from seborrhoeic dermatitis.
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