Orbital Roof Radiology

Smooth eros ion of the orbital roof is present but there is no evidence of aggressive bone destruction fig.

Orbital roof radiology.

Orbital process of the frontal bone orbital process of the zygomatic bone. Pure superior blowout fractures without associated orbital rim fracture are uncommon. It has a roof floor medial and lateral wall. The orbit is open anteriorly where it is bound by the orbital septum which forms part of the eyelids.

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. Tumors lymphoma metastasis lacrimal gland or duct tumors rhabdomyosarcoma of the orbit retinoblastoma optic nerve meningioma optic nerve glioma optic nerve schwannoma neurofibroma. The overall imaging appearance is most compatible with a benign lesion of a non vascular cause.

This fissure allows the passage to the nerves iii iv vi branches of the v 1 and ophthalmic veins. Isolated orbital roof fractures in adults are uncommon comprising 12 19 of all orbital wall fractures. Bilateral mildly displaced nasal bone fractures. A roof floor medial and lateral wall all of which converge posteriorly at the orbital apex.

Orbital roof fracture icd 801 01 etiology. The complementary roles of mri and ct well shown in this case. 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. Fissure fracture of the left sphenoid wing.

The orbit has four walls. Pathologic examination con firmed neurofibroma. Communited mildly depressed left orbital roof fracture. Orbital fat and the medial rectus muscle may prolapse into the ethmoid air cells.

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. 1 the roof of the orbit is composed of the frontal bone anteriorly and the lesser wing of sphenoid posteriorly. An orbital mass carries a relatively wide differential.

Orbital process of the frontal bone anterior superior portion lesser wing of the sphenoid postero medial portion inferior wall. Fracture of the left zygomaticomaxillary attachmnet with fracture of the anterior and lateral maxillary walls inferior orbital rim fracture and left maxillary hemosinus.