Coal forms from the accumulation of plant debris, usually in a swamp environment. When plant debris dies and falls into the swamp the standing water of the swamp protects it from decay. Swamp waters are usually deficient in oxygen, which would react with the plant debris and cause it to decay.
Porokeratosis is generally considered to be a benign condition though malignant transformation has been seen in all but the punctate variety, necessitating regular followup of patients with porokeratosis (Maubec et al., 2005; Sasson & Krain, 1996).
Keratosis pilaris is a very common skin disorder affecting many people of all ages. Keratosis pilaris is a benign condition that presents as numerous small, rough, red, or tan bumps primarily around hair follicles on the upper arms, legs, buttocks, and sometimes cheeks.Keratosis pilaris creates a goose bumps, gooseflesh, or chicken skin appearance on the skin.A majority of people with keratosis pilaris may be unaware that the skin condition has a designated medical term or that it is treatable.eratosis pilaris creates a goose bumps, gooseflesh, or chicken skin appearance on the skin. A majority of people with keratosis pilaris may be unaware that the skin condition has a designated medical term or that it is treatable.