Lesions of acute eczematous dermatitis are pruritic, edematous, oozing plaques, often containing vesicles and bullae. -With persistent antigen exposure, lesions may become scaly (hyperkeratotic) as the epidermis thickens (acanthosis)
Some changes are produced or exacerbated by scratching of the lesion
Causes skin dryness, redness, crusting, cracking, blistering, oozing, or thickening of the skin.
Areas involved - wrists, ankles, shins, forearms, neck, and behind the knees.
Rough or waxy, variably colored (skin-colored, yellow, tan, brown, black), discrete papule or plaque
Superficial nature of lesion confers a "stuck-on" appearance
Size ranges from a few millimeters to several centimeters
Distributed commonly on the trunk, also extremities, sometimes face; spares palms, soles, and mucosae
*classic appearance do not need biopsy
Usually less than 1 cm in diameter, tan-brown, red, or skin-colored and have a rough, sandpaper-like consistency
Erythematous, keratotic, thin papule on dorsal hand
Occurs on sun-exposed surfaces: scalp, face, ears, lower lips, dorsal hands, forearms
How it typically presents: