Blood vessels of median palatal fissural cysts

Abstract

I t is believed that fissural cysts may arise from enclaved cpithelial remnants in areas where the maxillary processes of the embryonic face fuse. It is convenient to divide nonodontogenic epidermal fissural cysts in the nasopalatine area into five classes according to their anatomic location and distribution along points of fusion of the embryonic face: 1. Median paZatine fissural cysts. Enclaved epithelium at the midline of the palate at point,s of junction between the palatine processes of the maxillary bones. 2. Median aZveoZar cysts. Enclaved epithelium in the anterior palate posterior to the central incisor at points of junction between the palatine and alveolar processes. 3. GZo~uZomaxiZZary cysts. Enclaved epithelium at the base of the nostril at points of junction between the globulas and the maxillary processes. 4. Nasoalveolar cysts. Enclaved epithelium at the base of the nostril at points of junction of the globular, lateral nasal, and maxillary processes. 5. Pmterola-temZ palatine cysts. Enclaved epithelium at points of junction between the horizontal process of the palatine bone and the palatine process of the maxillary bone. Scott1 precisely demonstrated the location and distribution of epithelial inclusion cysts along points of fusion of the embryonic face of fetal man. Cohen2 made histologic examinations of median palatine cysts enucleated from adult man and described the membranous connective tissue capsule which, he stated, often varies in thickness. He also demonstrated that the avascular cavity of the cyst contains cellular debris and that it is lined sometimes with stratified squa-