Ординатура / Офтальмология / Английские материалы / Illustrated Tutorials in Ophthalmology Kanski, Bolton 2001

Direct carotid-cavernous fistula

•Pulsatile proptosis with bruit • Retinal venous congestion and haemorrhages and thrill

•Abolished by ipsilateral

carotid compression

CYSTIC ORBITAL LESIONS

1.Dacryops

2.Dermoid cyst

•Superficial

•Deep

3.Mucocele

4.Encephalocele

•Anterior

•Posterior

Deep dermoid cyst

Presents in adolescence or adult life

• Non-axial proptosis

• May be extension into temporalis fossa or intracranially

• Associated bony defects

• May leak and cause granulomatous

inflammation and fibrosis

CT shows a heterogenous, well-circumscribed lesion

Encephalocele

Encephalocele - herniation of

intracranial contents through congenital skull defect

Meningocele - contains only dura

Meningoencephalocele - contains

dura and brain tissue

• Anterior (fronto-ethmoidal)

• Posterior (spheno-orbital)

Transmission of CSF pulsation causes pulsating proptosis without a bruit

Anterior encephalocele

•Involves supero-medial part of orbit

•Displaces globe forwards and laterally