trachea carcinoma in situ (MONDO_0004661) can be described as follows. A carcinoma that arises from the tracheal mucosa and is confined to the epithelial layer without evidence of further tissue invasion. Also known as: carcinoma in situ of the trachea, carcinoma in situ of trachea, severe epithelial dysplasia of trachea, stage 0 trachea carcinoma, trachea in situ carcinoma, tracheal carcinoma in situ.