Orbital Roof Radiology

The orbit is open anteriorly where it is bound by the orbital septum which forms part of the eyelids.

Orbital roof radiology.

It is a thin lamina separating the orbit anteriorly from the frontal sinus and posteriorly from the anterior cranial fossa. The complementary roles of mri and ct well shown in this case. The orbit has four walls. Smooth eros ion of the orbital roof is present but there is no evidence of aggressive bone destruction fig.

Communited mildly depressed left orbital roof fracture. A roof floor medial and lateral wall all of which converge posteriorly at the orbital apex. It has a roof floor medial and lateral wall. Orbital process of the frontal bone orbital process of the zygomatic bone.

Large round bony mass protruding superior and medially from the left anterior cranial fossa floor. Gross anatomy in the adult the orbit has a volume of approximately 30 ml of which the globe occupies 6 5 ml. Orbital process of the frontal bone anterior superior portion lesser wing of the sphenoid postero medial portion inferior wall. 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. Superior orbital fissure lies between the lesser and the greater wing of sphenoid. Orbital roof fracture icd 801 01 etiology. 1 the roof of the orbit is composed of the frontal bone anteriorly and the lesser wing of sphenoid posteriorly.

The medial orbital walls run virtually parallel but due to the shape of the orbits their long axes diverge at approximately 45. Isolated orbital roof fractures in adults are uncommon comprising 12 19 of all orbital wall fractures. They are usually seen in patients with pneumatization of the orbital roof 1 5. Fissure fracture of the left sphenoid wing.

Fracture of the left zygomaticomaxillary attachmnet with fracture of the anterior and lateral maxillary walls inferior orbital rim fracture and left maxillary hemosinus. Tumors lymphoma metastasis lacrimal gland or duct tumors rhabdomyosarcoma of the orbit retinoblastoma optic nerve meningioma optic nerve glioma optic nerve schwannoma neurofibroma. Bilateral mildly displaced nasal bone fractures. An orbital mass carries a relatively wide differential.

Pathologic examination con firmed neurofibroma. This fissure allows the passage to the nerves iii iv vi branches of the v 1 and ophthalmic veins.