Items tagged “orbit”

95 results found
Article

Abducens nerve

The abducens nerve is the sixth cranial nerve. It courses from its nucleus located in the dorsal pons to its innervation of the lateral rectus muscle and can be divided into four parts: nucleus and intraparenchymal portion cisternal portion cavernous sinus portion orbital portion Gross anat...
Article

Capillary haemangioma of the orbit

Capillary haemangiomas of the orbit, also known as strawberry haemangiomas, on account of its colouring, or orbital infantile haemangiomas, are the most common orbital tumours of infancy, and unlike orbital cavernous haemangiomas, they are neoplasms rather than vascular malformations. Clinical ...
Article

Orbital pseudotumour

Orbital pseudotumour is an idiopathic inflammatory condition that most commonly involves the extraocular muscles. Less commonly there is inflammatory change involving the uvea, sclera, lacrimal gland, and retrobulbar soft tissues. The exact aetiology is not known but an association with many inf...
Article

Phthisis bulbi

Phthisis bulbi, also known as end-stage eye, is an atrophic scarred and disorganised globe that may result from a variety of severe ocular insults.  Pathology The globe is reduced in size (usually < 20 mm) with a thickened/folded posterior sclera. Dystrophic calcification is common, and osseou...
Article

Retinoblastoma

Retinoblastomas are the most common intraocular neoplasm found in childhood, and with modern treatment modalities are, in most cases, curable. On imaging, they are generally characterised by a heterogeneous retinal mass with calcifications, necrotic components, and increased vascularisation on ...
Case

Erdheim-Chester disease

 Diagnosis almost certain
A.Prof Frank Gaillard
Published 07 May 2008
59% complete
MRI
Case

Caroticocavernous fistula (indirect)

Cav sinus
 Diagnosis certain
A.Prof Frank Gaillard
Published 18 Jul 2008
77% complete
CTDSA (angiography)
Case

Orbital metastases: breast cancer

 Diagnosis almost certain
A.Prof Frank Gaillard
Published 08 Oct 2008
59% complete
CT
Article

Orbital mass

An orbital mass carries a relatively wide differential: tumours lymphoma metastasis lacrimal gland or duct tumours rhabdomyosarcoma of the orbit retinoblastoma optic nerve meningioma optic nerve glioma optic nerve schwannoma  neurofibroma developmental orbital cysts 3: choristoma ep...
Article

Ophthalmic artery

The ophthalmic artery (OA) is a branch off the C6 segment of the internal carotid artery (ICA). Gross anatomy Origin OA arises medial to the anterior clinoid process as the ICA exits the cavernous sinus. It originates from the antero- or supero-medial surface of the ICA. Course OA passes in...
Case

Orbital varix

 Diagnosis almost certain
A.Prof Frank Gaillard
Published 27 Oct 2008
74% complete
CT
Article

Orbital venous varix

Orbital venous varix (OVV) is an uncommon vascular malformation which is composed of enlarged single or multiple tubular venous channels with direct communication to the systemic venous system.  Terminology Orbital venous varices are divided into primary and secondary. Primary orbital varices ...
Case

Thyroid orbitopathy

 Diagnosis almost certain
A.Prof Frank Gaillard
Published 16 Dec 2008
62% complete
CT
Case

Enophthalmos due to anorexia nervosa

 Diagnosis almost certain
A.Prof Frank Gaillard
Published 02 Jan 2009
62% complete
CT
Case

Orbital cavernous haemangioma - extra conal

Orbital Haemangio...
 Diagnosis certain
A.Prof Frank Gaillard
Published 06 Jan 2009
77% complete
MRI
Case

Ruptured globe

 Diagnosis certain
A.Prof Frank Gaillard
Published 06 Jan 2009
83% complete
CT
Case

Orbital abscess: lacrimal gland

 Diagnosis almost certain
A.Prof Frank Gaillard
Published 27 Jan 2009
56% complete
CT
Case

Multiple myeloma of the orbit

 Diagnosis certain
A.Prof Frank Gaillard
Published 15 Apr 2009
71% complete
CT
Article

Trilateral retinoblastoma

Trilateral retinoblastoma refers to the combination of retinoblastoma (usually bilateral) and pineoblastoma. This relationship highlights the close relationship between these highly aggressive small round blue cell tumours. It affects only a minority of patients with retinoblastoma (1.5-5%) and...
Article

Optic pathway glioma

Optic pathway gliomas are relatively uncommon tumours, with a variable clinical course and usually seen in the setting of neurofibromatosis type I (NF1). Histologically the majority are pilocytic astrocytomas.  They are characterised on imaging by an enlarged optic nerve seen either on CT or MR...

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