Flashcard: Dermatology: Skin Disease Fundamentals — 16 carte

Skin diseases — definition?

Disorders affecting the skin's structure or function.

Macule — size?

Less than 1 cm, flat, discolored patch.

Papule — feature?

Small, raised, solid skin lesion under 1 cm.

Pustule — content?

Fluid-filled lesion containing pus.

Plaque — size?

Larger than 1 cm, flat-topped, raised lesion.

Nodule — characteristic?

Solid, firm, larger than 1 cm lump.

Tumor — nature?

Uncontrolled tissue mass, benign or malignant.

Acute dermatoses — features?

Rapid onset, erythema, edema, vesiculation.

Urticaria — cause?

Mast cell degranulation releasing histamine.

Erythema multiforme — presentation?

Targetoid lesions, triggered by infections or drugs.

Acute eczema — triggers?

Allergens, drugs, sun exposure.

Chronic dermatoses — features?

Persistent inflammation, hyperplasia, hyperkeratosis.

Psoriasis — key pathology?

Epidermal hyperplasia, parakeratosis.

Lichen planus — appearance?

Pruritic, purple, polygonal papules with Wickham’s striae.

Impetigo — cause?

Contagious bacterial skin infection.

Tinea capitis — affected area?

Scalp, hair follicles, causing alopecia.