Condition	Characteristics	Area affected	Demographic affected
Amyloidosis	Highly pruritic, pigmented papules and plaques	Shins, upper back, auricular concha; other sites of chronic scratching	Adults
Colloid milium	Dome-shaped, translucent to yellow-brown papules	Sun-exposed areas	Middle-aged, fair-skinned individuals
Flat warts (verrucae plana)	Flat, flesh-colored papules	Face, dorsal hands, and shins are most common	Usually children
Intertriginous granular parakeratosis	Pruritic, brownish-red, keratotic papules that can coalesce into plaques	The axillae are most common, but any intertriginous site can be affected	Adult form almost always occurs in women; childhood form in diaper area affects boys and girls equally