skin disorders
Squamous Cell Carcinoma in Situ
Introduction
Squamous cell carcinoma in situ is an early form of Squamous Cell Carcinoma that is confined to the outer layer of the skin (epidermis) and has not yet invaded the deeper layers. Squamous cell carcinoma in situ (formerly called Bowen disease) most commonly occurs on sun-exposed areas of the skin but may occur anywhere. There may be many carcinomas or only a few. The affected skin is red-brown and scaly or crusted and flat, sometimes looking like a patch of Psoriasis , 