Intraepithelial Neoplasia in Barrett Esophagus

A precancerous neoplastic process that affects the squamous, glandular, or transitional cell epithelium without evidence of invasion. According to the degree of…

Within the layer of cells that form the surface or lining of an organ.

Administration of a drug within the superficial epithelial layer of the skin.

A rare cutaneous lesion presenting as a scaly verrucous plaque. Morphologically, the plaque contains nests of basaloid cells.

Administration of a drug within or beneath the dura mater.

An area within the dura sheath but outside of the spinal cord.