Give some skin deases images

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I now have a good collection of clinical images from authoritative dermatology textbooks. Here is a comprehensive visual overview of common skin diseases, sourced from Andrews' Diseases of the Skin and Fitzpatrick's Dermatology:

Common Skin Diseases - Clinical Images

1. Psoriasis (Guttate Type)

Numerous small, drop-like red scaly lesions covering the body surface

Key features: Guttate ("drop-like") psoriasis presents as widespread red papules with silvery scale, often triggered by streptococcal infection. - Andrews' Diseases of the Skin, Fig. 10.2

2. Psoriasis (Plaque Type)

Discrete, circular erythematous plaques with adherent silvery-white scale

Key features: Classic chronic plaque psoriasis shows well-defined, raised, red-to-pink plaques with thick micaceous scale at sites of predilection (elbows, knees, scalp, sacrum). - Andrews' Diseases of the Skin, Fig. 10.3

3. Pustular Psoriasis (of the Hand)

Raised red pustular lesions and thick scaling over the palm and fingers

Key features: Pustular psoriasis of the palms and soles is a chronic variant; sterile pustules form within erythematous plaques. - Andrews' Diseases of the Skin, Fig. 10.4

4. Nail Psoriasis (Oil Spot Sign)

Brownish-yellow discoloration under the nail plate - the "oil spot" or "salmon patch"

Key features: Psoriatic nail involvement affects up to 80% of psoriasis patients. The oil spot is a translucent yellowish-red discoloration beneath the nail. - Andrews' Diseases of the Skin, Fig. 10.5

5. Atopic Dermatitis (Infantile Eczema)

Extensive red, weeping, scaly patches across a child's cheeks and chin

Key features: Infantile atopic dermatitis typically begins as erythema and scaling of the cheeks, often extending to the scalp and extensor surfaces. It is severely pruritic and associated with elevated IgE and the "atopic march" (later asthma, rhinitis). - Andrews' Diseases of the Skin, Fig. 5.1

6. Acne Vulgaris

Open comedones (blackheads), closed comedones, and inflammatory papules on the face

Key features: Acne vulgaris is a chronic inflammatory disease of the pilosebaceous unit. Lesions include comedones (open = blackheads, closed = whiteheads), papules, pustules, nodules, and scars. The face, upper chest, and back are most often affected. - Andrews' Diseases of the Skin, Fig. 13.1

7. Tinea Corporis (Ringworm - Polycyclic)

Multiple polycyclic erythematous annular plaques with a raised scaly border on the trunk

Key features: Tinea corporis is a dermatophyte infection of glabrous skin. The classic sign is an annular "ringworm" plaque with an active, scaly, advancing erythematous border and central clearing. Caused by Trichophyton or Microsporum species. - Fitzpatrick's Dermatology, Fig. 160-9B

8. Urticaria (Hives)

Large, erythematous wheals with irregular borders and surrounding red flare

Key features: Urticaria (hives) presents as transient, pruritic wheals caused by localized dermal edema from mast cell degranulation. Individual wheals rarely last more than 24 hours. Triggers include drugs (NSAIDs, antibiotics), foods, infections, and physical stimuli. - Andrews' Diseases of the Skin, Fig. 7.14

Sources: All images are from Andrews' Diseases of the Skin - Clinical Dermatology and Fitzpatrick's Dermatology (authoritative clinical dermatology textbooks).

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