Orbital Roof Radiology

Orbital process of the frontal bone anterior superior portion lesser wing of the sphenoid postero medial portion inferior wall.

Orbital roof radiology.

Fissure fracture of the left sphenoid wing. Most roof fractures are associated with other orbital fractures and result from significant head trauma as a high degree of force is required to fracture this portion of the orbit. Orbital fat and the medial rectus muscle may prolapse into the ethmoid air cells. This fissure allows the passage to the nerves iii iv vi branches of the v 1 and ophthalmic veins.

A roof floor medial and lateral wall all of which converge posteriorly at the orbital apex. The orbit has four walls. Gross anatomy in the adult the orbit has a volume of approximately 30 ml of which the globe occupies 6 5 ml. An orbital mass carries a relatively wide differential.

Communited mildly depressed left orbital roof fracture. Orbital roof fracture icd 801 01 etiology. Orbital process of the frontal bone orbital process of the zygomatic bone. The medial orbital walls run virtually parallel but due to the shape of the orbits their long axes diverge at approximately 45.

Tumors lymphoma metastasis lacrimal gland or duct tumors rhabdomyosarcoma of the orbit retinoblastoma optic nerve meningioma optic nerve glioma optic nerve schwannoma neurofibroma. They are usually seen in patients with pneumatization of the orbital roof 1 5. The overall imaging appearance is most compatible with a benign lesion of a non vascular cause. Pathologic examination con firmed neurofibroma.

Bilateral mildly displaced nasal bone fractures. It is a thin lamina separating the orbit anteriorly from the frontal sinus and posteriorly from the anterior cranial fossa. The orbital roof is composed of the orbital plate of the frontal bone with a small contribution from the lesser wing of the sphenoid at the apex figures 3 4 and 3 5. Pure superior blowout fractures without associated orbital rim fracture are uncommon.

The complementary roles of mri and ct well shown in this case. Large round bony mass protruding superior and medially from the left anterior cranial fossa floor. Superior orbital fissure lies between the lesser and the greater wing of sphenoid. 1 the roof of the orbit is composed of the frontal bone anteriorly and the lesser wing of sphenoid posteriorly.

Fracture of the left zygomaticomaxillary attachmnet with fracture of the anterior and lateral maxillary walls inferior orbital rim fracture and left maxillary hemosinus. The orbit is open anteriorly where it is bound by the orbital septum which forms part of the eyelids.