Items tagged “orbit”

123 results found
Article

Abducens nerve

The abducens nerve is the sixth cranial nerve (CN VI). It is a motor nerve responsible for abduction of the eye (TA: nervus abducens or nervus cranialis VI). It courses from the abducens nucleus, located in the dorsal pons, up to the cavernous sinus, via a long cisternal segment that is prone to...
Article

Capillary hemangioma of the orbit

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

Idiopathic orbital inflammation

Idiopathic orbital inflammation, also known as orbital pseudotumor and non-specific orbital inflammation, 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 retrob...
Article

Phthisis bulbi

Phthisis bulbi, also known as end-stage eye, is an atrophic scarred and disorganized non-functioning globe that may result from a variety of severe ocular insults.  Epidemiology In general, phthisis bulbi involves elderly patients, usually 65-85 years of age 7. Children and adolescents are onl...
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 characterized by a heterogeneous retinal mass with calcifications, necrotic components and increased vascularization on D...
Case

Caroticocavernous fistula (indirect)

  Diagnosis certain
Frank Gaillard
Published 18 Jul 2008
65% complete
CT DSA (angiography)
Case

Orbital metastases: breast cancer

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

Orbital mass

An orbital mass carries a wide differential. Differential diagnosis tumors lymphoma metastasis lacrimal gland or duct tumors rhabdomyosarcoma of the orbit retinoblastoma optic nerve meningioma optic nerve glioma schwannoma (of trigeminal or other cranial nerves except optic) neurofibr...
Article

Ophthalmic artery

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

Orbital varix

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

Orbital venous varix

Orbital venous varix (plural: varices) is an uncommon vascular malformation that is composed of enlarged single or multiple tubular venous channels within the orbit with direct communication to the systemic venous system.  Terminology Orbital venous varices are divided into primary and seconda...
Case

Thyroid orbitopathy

  Diagnosis almost certain
Frank Gaillard
Published 16 Dec 2008
71% complete
CT
Case

Enophthalmos due to anorexia nervosa

  Diagnosis almost certain
Frank Gaillard
Published 02 Jan 2009
65% complete
CT
Case

Orbital cavernous hemangioma - extra conal

  Diagnosis certain
Frank Gaillard
Published 06 Jan 2009
77% complete
MRI
Case

Ruptured globe

  Diagnosis certain
Frank Gaillard
Published 06 Jan 2009
68% complete
CT
Case

Orbital abscess - lacrimal gland

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

Multiple myeloma - orbit

  Diagnosis certain
Frank Gaillard
Published 15 Apr 2009
80% 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 tumors. It affects only a minority of patients with retinoblastoma (1.5-5%) and ...
Article

Optic pathway glioma

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

Tram-track sign (orbit)

Tram-track sign refers to the parallel thickening and enhancement around the optic nerve, and is most frequently seen in the setting of optic nerve meningioma. It may, however, also be seen in 1: orbital pseudotumor perioptic neuritis orbital sarcoidosis orbital leukemia orbital lymphoma o...

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