Presentation
Left medial orbital swelling.
Patient Data
Left medial canthus cystic lesion with homogeneous hypodense content of fat density and a smooth wall. No intraorbital extension. No connection to the lacrimal apparatus.
Case Discussion
Typical features of internal angular dermoid cyst. It is a fat-containing benign lesion that occurs at the medial or lateral angle of the orbit. It represents the most common congenital lesion of the orbit. The most common location is at the frontozygomatic suture (80%) followed by the nasal aspect of upper orbit at the frontoethmoidal suture. It could be diagnosed if the fatty components are found within it.