Internal angular dermoid cyst

Case contributed by Dr Fateme Hosseinabadi

Presentation

Painless subcutaneous mass.

Patient Data

Age: 30 years
Gender: Male
CT

Right-sided fat containing extraconal mass lesion located superficially at the medial canthus with scalloping of the adjacent nasal bone. No intraorbital or intracranial extension.

Case Discussion

Dermoid cysts occur when skin elements become trapped along lines of embryological closure. Most common site of occurrence in orbit is supraorbital ridge or frontozygomatic suture, followed by frontoethmoidal suture.

On imaging, these lesions may show fat, fluid or soft tissue signal and calcification. On CT scan the lesion is seen as low density, extraconal, non-enhancing mass with a smooth margin.

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Case information

rID: 62848
Published: 20th Jan 2019
Last edited: 14th Aug 2019
System: Head & Neck
Inclusion in quiz mode: Included
Institution: Zahedan medical university

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