orbita, globo ocular, la conjuntiva capsula de tenon paredes orbitarias: superior ( techo): formada por el hueso frontal en su profundidad el ala menos del. Non-contrast CT is useful in the initial evaluation of orbital and globe trauma for the assessment of fractures, extra-ocular muscle herniation and. Aug 30, · “El torero Juan José Padilla sufre estallamiento de glóbulo ocular por cornada” EfektoTV Deportes: – Duration: Efekto Televisión 1,,
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Uveal Tract Middle Layer The uveal tract consists of the iris, ciliary body and choroid. Thickening and enhancement of left retina, posterior choroid and optic disc are observed, suggestive of posterior uveitis, which may be associated with inflammatory conditions such as sarcoidosis or infections such as toxoplasma or cytomegalovirus.
Eye Globe Abnormalities on MR and CT in Adults: An Anatomical Approach
Histology following resection of cerebellar lesion confirmed diagnosis of hemangioblastoma. Inflammation of the uveal tract commonly involves the adjacent retina and sclera Fig. Axial non-contrast image from brain CT assessment of altered mental state. Axial non-contrast enhanced image from orbital CT study on patient with history of Wegener’s granulomatosis with posterior scleritis.
Axial non-contrast image from brain CT assessment of altered estallamidnto state shows right phthisis bulbi with irregular, scarred, shrunken right globe and dense internal calcification. Anatomy and pathology of the eye: Effusions due to infection or inflammation of adjacent structures, traumatic hemorrhage and neoplasms including metastases can distend the episcleral space Figs.
Hypointense material in vitreous is suggestive of hemorrhage. Axial T2W image from orbital MRI study following direct left globe trauma shows iso- to hypointense episcleral material surrounding globe, consistent with hematoma. Vascular lesions of the orbit: Gas is noted in anterior vitreous compartment consistent with pneumatic retinopexy typically used in treatment of superior rhegmatogenous retinal detachments.
Capillary hemangiomas of the retina occur in a quarter to half of patients with Von Hippel-Lindau syndrome and are histologically similar to the associated cerebellar hemangioblastoma Fig. Subretinal fluid accumulation can occur in nonrhegmatogenous detachments secondary to underlying neoplasms and hemorrhage. These lesions oculwr supplied by dilated feeder vessels with propensity for retinal hemorrhage and detachment.
Lens dislocation can be well visualised and is typically secondary to trauma or degeneration of the zonular fibers Fig. Buckling and defect in superior sclera Bwhite arrow with loss of globe volume is consistent with globe rupture. Hyperintense-not usually seen separately from underlying choroid. Received Aug 23; Accepted Jun 5. Understanding the anatomy is a key component in the structured approach to a differential diagnosis. Globe Anatomy The globe occupies one third of the orbital volume, estallamienyo the vitreous humour representing two-thirds of the volume of the globe 2.
Coronal non-contrast image from brain CT assessment of frequent falls. Disruption of the sclera can result from trauma globe rupture Figs. Fluid may also accumulate in the retrohyaloid space. Bilateral focal protrusions through thinned sclera posteriorly are consistent with posterior staphylomas white arrows. Enhancing lesion is observed in region of fourth ventricle complicated by hydrocephalus not shown.
Knowledge of the imaging features of both traumatic and non-traumatic globe abnormalities is necessary to ensure appropriate ophthalmology referral and accurate diagnosis.
Axial non-contrast image from post traumatic brain CT scan estalamiento expansion of left episcleral space by hyperdense hematoma white asteriskwhich extends posteriorly to surround globe likely within intra-conal space.
CT or MR evaluation may be useful in posterior uveitis, for assessment of complications including chorioretinal detachment, underlying abscesses or foreign bodies providing a nidus for infection 9. Other globe neoplasms also predominantly involve the highly vascular uveal tract and include metastases commonly breast and lungbenign neoplasms such as ovular, and inflammatory processes such as sarcoidosis 6. Posterior Vitreous Detachment In old age, the vitreous may shrink and form clumps leading to ‘floaters’.
The uveal tract is highly vascular and contains pigmented melanocytes. Neuroimaging Clin N Am.
Guía de la salud ocular – Enfermedades, problemas y condiciones oculares
The sclera is enveloped by the fibroelastic Tenon’s capsule, which fuses with the bulbar conjunctiva and is perforated posteriorly by the optic nerve sheath. The vascular uveal tract is the most common site for hematogenously disseminated metastases within the globe Fig.
The outer retinal pigment epithelium RPE is attached firmly to the choroid. Anotated illustration of globe for comparison with MRI anatomy.
Endophthalmitis Endophthalmitis represents inflammation or infection involving the anterior chamber and vitreous humour. Medial lesion shows contrast enhancement.
A primary understanding of the estalamiento anatomy is key to characterising both traumatic and non-traumatic globe abnormalities. Arch Pathol Lab Med. The choroid merges with the ciliary body at the ora serrata and extends posteriorly to the optic nerve head.
The innermost sensory retina is responsible for visual perception. The various pathological processes involving these etallamiento are highlighted using case examples with fundoscopic correlation where appropriate. Non-contrast CT is useful in the initial evaluation of orbital and globe trauma for the assessment of fractures, extra-ocular muscle herniation and estallamienyo globe rupture. The differential diagnosis can be made easier and refined by categorising the abnormalities according to the layers and the compartments of the globe.
Optic nerve is labeled dashed black arrow.