2.4 Erosion

None.

Superficial epidermal defect with loss usually extending no further than papillary dermis.

Color: red.

Size: mm to cm.

Location depends on etiology; may be isolated or localized.

Mucosal erosions.

Often covered with crust, on rare occasions may heal with dyspigmentation.

Associated with vesicles, bullae, pustules.

Superficial lesion which heals without atrophy or scarring because epidermis is capable of completely regenerating.

Impetigo, herpes simplex.

Epidermolysis bullosa simplex.

Pemphigus.

Bullous pemphigoid.

Inflammation, infection, trauma (scratching).