What is Extraconal space?
What is Extraconal space?
The extraconal orbital compartment or extraconal space is the space within the orbit outside the musculofascial cone. The base of which is anterior and is formed by the orbital septum that surrounds the equator of the globe. The external sides are formed by the bones of the orbit and their periosteum.
What is Intraconal and Extraconal?
The intraconal compartment contains the globe, the optic nerve-sheath complex, orbital vessels. The extraconal compartment consists of the bony orbital walls, fat. and the lacrimal gland.
What is the most common malignancy of the orbit?
Breast cancer is the most common malignancy to metastasize to the orbit, followed by prostate cancer, melanoma, and lung cancer. In women with bilateral enophthalmos, metastatic scirrhous breast cancer should be considered in the differential diagnosis.
How common are orbital tumors?
Introduction to Orbital Tumors Fortunately, malignant tumors of the orbit are unusual. Neoplasms account for approximately 20% to 25% of orbital disease and are more common in the seventh decade and afterward. In most cases, they come from adjacent sinuses or from the overlying skin.
What is the orbital fascia?
The periorbita, also called the orbital periosteum or orbital fascia, covers the bones of the orbit (Figure 8-17). This dense connective tissue membrane serves as an attachment site for muscles, tendons, and ligaments and is a support structure for the blood supply to the orbital bones.
What is orbital compartment syndrome?
Orbital compartment syndrome is an uncommon, ophthalmic surgical emergency characterized by an acute rise in orbital pressure. When intraorbital tension rises, damage to ocular and other intraorbital structures, including irreversible blindness, may occur if not promptly treated.
How are orbital tumors diagnosed?
As with most brain tumors, imaging studies are essential to diagnosis of tumors of the orbit. Both magnetic resonance imaging (MRI) and computed tomography (CT) scans can be used. In general, MRI scans are preferred because they provide clear images of the structures within the orbit.
Where is the orbital fissure?
The superior orbital fissure is a bony cleft found at the orbital apex between the roof and lateral wall. It is a communication between the orbital cavity and middle cranial fossa and is bounded by the greater wing, lesser wing and body of sphenoid.
Is there fascia in the eye?
Tenon’s capsule is a thin fascial sheath that surrounds the eyeball, separating it from the orbital fat. The inner surface of the capsule is smooth and shiny. A potential space, the episcleral (sub-Tenon’s) space, separates the capsule from the outer surface of the sclera.
What kind of lesions are found in the extraconal space?
Dr Daniel J Bell ◉ and Dr Amir Rezaee et al. Extraconal orbital lesions include lesions which arise from structures within the extraconal orbital space and those extending from adjacent structures into the orbits.
What kind of lesion is an extraconal cyst?
Extraconal orbital lesions include lesions which arise from structures within the extraconal orbital space and those extending from adjacent structures into the orbits. dermoid cyst: most common lesion in pediatrics. lacrimial gland lesions.
Why do I have a lesion on my lung?
A lung lesion is abnormal tissue found on or in a person’s lung. It can be the result of an infection or illness, which may clear up without causing the patient long-term problems. For example, some lung lesions develop because of tuberculosis or pneumonia infections.
What are the symptoms of lung cancer lesions?
The lesions may be accompanied by such symptoms as coughing, chest pain, and shortness of breath. Some people cough up blood while others do not have symptoms at all, at least in the early stages of cancer. There are many treatments for lung lesions, including chemotherapy and the removal of lung tissue.
What is Extraconal space? The extraconal orbital compartment or extraconal space is the space within the orbit outside the musculofascial cone. The base of which is anterior and is formed by the orbital septum that surrounds the equator of the globe. The external sides are formed by the bones of the orbit and their periosteum.…