Epidermoid or dermoid cyst occurs throughout aberranted ectodermal tissue during embryonic development, or inflammatric and traumatic aberration of the epithelium. These cysts occur rarely in oral cavity. It occurs in the oral cavity mostly on the oral floor and rarely on the cheek.
The authors have experienced two cases of epidermoid cysts on the left cheek.
Case 1: 24 years old man. The cyst was well-demarcated and had movability on the left cheek, and could be easily extracted from extra-oral under local anesthesia. The authors supposed that this cyst had a posterior origin, because the patient had an external injury over 2 years ago.
Case 2: 24 years old man. The cyst was well-demarcated and had movability on the left cheek, and could be easily extracted from intra-oral under local anesthesia. The authors supposed that this cyst had an inborn origin, because the patient had not an posterior origin.
Two cases was epidermoid cyst for histopathological diagnosis.
