Presentation
Non-tender swelling along the lateral aspect of the left orbital rim since birth. No visual symptoms.
Patient Data
Two well-defined fat echogenicity lesions lying close to each other, measuring 8 x 15 mm and 3 x 8 mm are seen in the subcutaneous soft tissues of the left upper eyelid close to the outer canthus. No internal vascularity is seen in these lesions on color Doppler ultrasound examination.
Two fat density lesions lying close to each other, along the superolateral aspect of the left orbital rim. These lesions measure 8 x 13 mm and 3 x 3 mm. The average density of the larger lesion is -100 HU. No calcifications are seen in these lesions. No extension is seen in the deeper tissues/orbital activity.
Histopathology confirms the radiological findings of the dermoid cyst.
Case Discussion
Imaging features are consistent with superficial orbital dermoid cysts along the superolateral aspect of the left orbital rim.