Presentation
Painless soft tissue mass-like bulge in nasal side of the left upper eyelid.
Patient Data
On this performed non-contrast orbital MDCT, there is a well-defined low-density fluid containing cyst in left upper lid subdermal nasal side extended within adjacent upper nasal wall subdermal which has an impression on adjacent bone and inferior and posterior margin of the cyst are in close contact with medial canthus ligament complex.
No gross postseptal extension of the cyst could be detected.
Case Discussion
A dermoid cyst is a congenital orbital choristoma or true hamartoma and consisted of keratinized epithelium and adnexal structures and is one of the most common non-inflammatory slow-growing orbital masses in children. The cyst is due to sequestrated and entrapped epithelium along bone sutures and most of these cysts are considered congenital but diagnosed by 5 years of age and occur in the head and neck especially eyelids alongside the bone sutures. The most common affected region in the head and neck is the temporal side of the upper eyelid adjacent to the fronto-zygomatic suture. The epidermoid cyst is the main differential diagnosis.
For evaluation of the intracranial or deep extension of the dermoid cyst, MRI is a better imaging modality than MDCT but for evaluation of bone erosion, MDCT is the imaging modality of choice. These eyelid cysts are usually well-defined, homogeneous, and hypodense on MDCT, and fat components of the eyelids dermoid cyst is better detected on MRI.
As these cysts progressively grow the treatment of choice of these cysts is careful and complete surgical excision without rupture of the cyst.
Unable to process the form. Check for errors and try again.