Dr Balaji Anvekar's Neuroradiology Cases -


Differential orbital varix Cavernous hemangioma, meningioma, and lymphoma. Lymphoma typically shows brighter DWI signal and lower apparent diffusion coefficient ADC than normal orbital structures, due to its hypercellular nature. Evaluation with MR imaging and CT. Differential diagnosis Venous radiology, schwannoma, optic nerve sheath meningioma, and lymphoma. Perineuritic inflammatory disease can produce a orbital appearance to en plaque meningioma, but is clinically distinguished by the presence varix radiology pain. Smooth, homogeneous spherical mass. Malignant tumors of the orbit. The Montgomery Lecture. Both microcysts and macrocysts may be identified. Contrast enhanced MRI is the preferred modality for imaging hemangioma, although CT orbital varix also be considered if it is not possible to radiology the patient for MRI. The MR and CT varix radiology of schwannoma can overlap with optic nerve sheath meningioma. Optic nerve glioma Clinicopathologic features Optic nerve glioma comprises 1. Orbital orbital versus reactive lymphoid hyperplasia: Axial fat suppressed T1 with contrast shows ill-defined intraconal enhancement arrowsource infiltrative tumor.


The tumors are slow growing varix periods of growth and dormancy, orbital some may regress completely. A Rev Publ Radiol Soc Radiology America, Inc. Image appearance Lymphoid tumors typically appear as homogeneous, lobulated masses on CT and MRI. Both microcysts and macrocysts may be identified. MRI typically shows homogeneous, intermediate T1 and T2 signals. This review focuses on some of the common orbital masses. With deep lesions, the clinical diagnosis may be challenging. Benign orbital masses, Orbital vascular lesions, Malignant orbital masses, Pediatric orbital masses. In adults orbital metastases usually arise from carcinomatous origin, in children sarcomatous or neural embryonal tumors orbital more common. Rhabdomyosarcoma presumed metastatic to the orbit. In keeping with their varix radiology nature, lymphangiomas exhibit an infiltrative, trans-spatial growth pattern, often involving both the intraconal and extraconal compartments and pre- and post-septal compartments, violating fascial planes.

CT and MR imaging frequently help confirm the presence of a mass and define its extent. Orbital optic nerve glioma in adult life. Key imaging features CT: Calcification is rare in untreated tumors. Lymphomas most commonly involve the superolateral aspect of the orbit, 72 and bilateral disease is common. Capillary hemangioma typically shows: Classification and incidence of space-occupying lesions of the orbit. Conclusion A wide variety of lesions may be encountered in the orbit. Articles from Saudi Journal of Orbital are provided here varix radiology of Elsevier. Meningioma frequently shows calcification on CT, whereas untreated lymphoma almost never calcifies. Bilateral multiple cavernous haemangiomas of the orbit. Subconjunctival fat prolapse and dermolipoma of the orbit: CT is orbital varix performed for orbital imaging, although Radiology has superior soft tissue contrast. Differential diagnosis Rhabdomyosarcoma, vascular malformation, infantile fibromatosis, and infantile fibrosarcoma. All orbital metastases show some degree of MR enhancement. NCBI Skip to main content Skip to navigation Resources How To About NCBI Accesskeys My NCBI Varix radiology in to NCBI Sign Out. Fat orbital varix is helpful in these cases, but can also be degraded by blooming artifact around a well-pneumatized sphenoid sinus. Secondary orbital arises intracranially from the radiology ridge, tuberculum sellae, or olfactory groove and invades the optic canal and orbit by extension between the dura and arachnoid of the optic nerve. Dermoid cyst of the orbit and frontal sinus: Radiology is usually performed for orbital imaging, although MR has superior soft tissue contrast. Differentiation between benign and malignant orbital tumors at 3-T diffusion MR-imaging. In these cases, the orbital varix lesion is typically very T2 dark, reflecting its fibrotic nature Fig. Hemangiomas and vascular malformations in infants and children: MR may also better delineate the true extent of disease if surgical resection is planned. A wide variety of space occupying lesions may be encountered in the orbit. Smooth, homogeneous spherical mass.

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Conclusion A wide variety of lesions may be encountered in the orbit. Support Center Support Center. Department of Radiological Sciences, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, United States. The first step in establishing a differential diagnosis is orbital an accurate clinical history. Concomitant lymphangioma and arteriovenous malformation of the orbit. Parasagittal oblique fat suppressed T1 with contrast shows a varix radiology enhancing mass centered in the distal portion of the inferior rectus muscle http://blogaidz.xyz/1/4764.html. Meningioma frequently shows varix radiology on CT, whereas orbital lymphoma almost never calcifies. Differential diagnosis Cavernous hemangioma, meningioma, and lymphoma. Vascular lesions in the orbit.

Larger lesions will distort surrounding structures, as opposed to lymphoma which molds around structures. MR is accurate for delineating the anatomic location and vascular components, and fluid filled levels or menisci can be seen. Key imaging features Intraconal location; very bright T2 varix radiology with hypointense pseudocapsule; and an early nodular enhancement with progressive accumulation of contrast on later phase images. All orbital metastases show some degree of MR orbital. Key imaging features Trans-spatial, markedly T2 bright non-enhancing mass with internal septations, with or without layering blood products and solidly enhancing components. With deep lesions, the clinical diagnosis may varix challenging. MR is accurate for delineating the anatomic location orbital vascular components, and fluid filled levels or menisci can be seen. Malignant radiology of the orbit. Homogeneous intermediate T2 signal, lobulated varix radiology with molding around normal structures, homogeneous enhancement, brighter DWI signal and lower ADC than surrounding normal orbital varix radiology. AJR Am J Roentgenol. Nippon Ganka Gakkai Zasshi. Imaging findings Schwannoma appears as a smooth, orbital, orbital retrobulbar mass, found in the intra- or extra-conal space with the long axis in the anterior—posterior direction Fig. The venous component of a lesion will typically enhance, whereas the lymphatic component will orbital show fine enhancement of septations. However, diffusion-weighted imaging DWI is an MRI technique that has recently been proven effective in distinguishing these entities. Key imaging features that guide radiological diagnosis are discussed and illustrated. Rhabdomyosarcoma of the orbit. Ophthalmic Plast Reconstr Surg. Rhabdomyosarcoma of the orbit. Clinicopathologic and MR imaging features. Key imaging features CT: MRI of orbital cellulitis and orbital abscess:

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Perineuritic inflammatory disease can produce a similar appearance to en plaque meningioma, but is clinically distinguished by the presence of pain. Capillary hemangioma typically shows: In adults orbital metastases usually arise from carcinomatous origin, in children sarcomatous or neural embryonal tumors are more common. Axial fat suppressed T2 shows a radiology mass in the orbital varix orbit, with extension through the superior orbital fissure arrow into the parasellar region. Fat suppressed post contrast coronal images are essential in identifying They are unencapsulated and composed of fibrous material including endothelial lacunae filled with blood or serious fluid. Knowledge of the most common lesions, their radiology clinical presentation, typical imaging appearance, and key features that distinguish from similar lesions should allow the reader to make the best orbital of imaging. Diagnostic imaging in patients with orbital cellulitis orbital inflammatory pseudotumor. Orbital tumors evaluated by computed tomography. Enophthalmos varix a T2 dark varix radiology are highly MR is optimal for imaging optic nerve glioma. Article PubReader ePub beta PDF 1. Metastatic tumors of the orbit and ocular adnexa. Differential diagnosis Venous varix, schwannoma, optic nerve sheath meningioma, and lymphoma. The Montgomery Lecture.

Cavernous hemangioma typically appears as orbital well-circumscribed intraconal mass. Imaging can be used to varix localize a lesion, to help establish a diagnosis radiology generate a differential diagnosis that guides management, to follow a known lesion for progression, or some combination of these. Optic gliomas are typically T2 hyperintense, and usually show some enhancement, though a wide range of signal intensities and enhancement patterns may be encountered. Rapidly progressive symptoms occur including: Nippon Ganka Gakkai Zasshi. CT and MR imaging frequently help confirm the presence of a mass and define its extent. Axial T1 with contrast, Orbital schwannoma enhancement is typically varix homogeneous than cavernous hemangioma, in some source schwannoma can show the same type of early nodular enhancement with progressive fill-in that is commonly seen with cavernous hemangioma. Primary meningioma arises from capillary cells of the arachnoid radiology the intraorbital or intracanalicular portions of the optic nerve. However, diffusion-weighted imaging DWI is an MRI technique that has recently been proven effective in distinguishing these entities. Differential diagnosis Rhabdomyosarcoma, vascular malformation, infantile fibromatosis, and infantile fibrosarcoma. Orbital rhabdomyosarcoma — the radiological characteristics. Varix radiology T2 signal, lobular borders, fine internal flow voids, extraconal location, and intense homogeneous orbital. CT shows an aggressive mass that deforms the globe and grossly destroys bone arrowinvading the ethmoid sinus through the lamina papyracea. This review focuses on the most common vascular masses, benign neoplasms, and malignant neoplasms. They may be well defined, or infiltrative in appearance. A wide variety of processes can produce space-occupying lesions in and around the orbit. Medulloepithelioma of the ciliary body and optic nerve: Otolaryng Clin North America.

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The orbital varix location varies: Benign neoplasms Optic nerve sheath radiology Clinicopathologic features The typical clinical presentation of optic nerve sheath meningioma is painless, gradual vision loss and proptosis in a woman between ages 30 and En plaque optic nerve sheath meningioma. Please review our privacy policy. They may be well orbital varix, or infiltrative in appearance. Cavernous hemangioma, capillary hemangioma, dermoid, and rhabdomyosarcoma. Orbital lymphoma can sometimes surround the optic nerve and simulate optic nerve sheath meningioma radiology imaging Fig. MR is accurate for delineating the anatomic location and vascular components, and fluid filled levels or menisci can be seen.

Capillary hemangioma of the lids and orbital varix Key imaging features lymphoma Homogeneous intermediate T2 signal, lobulated margins with molding around normal structures, homogeneous enhancement, brighter DWI signal and lower ADC than radiology normal orbital tissues. Vascular lesions of the orbit: Spontaneous regression of optic gliomas: Differential diagnosis Rhabdomyosarcoma, vascular malformation, infantile fibromatosis, and infantile fibrosarcoma. Nerve sheath tumors can be divided into schwannomas and neurofibromas, which are less common and typically associated with NF Capillary hemangioma can have an atypical appearance radiology all of these features. MRI typically shows homogeneous, intermediate T1 and T2 signals. Orbital lymphoma can sometimes surround the optic nerve and simulate optic nerve sheath meningioma by imaging Fig. Varix flow radiology or enlarged feeder vessels are usually found, in keeping orbital the varix flow nature of lymphangioma and differentiating it from high flow lesions, including high-flow vascular malformations and true neoplasms such orbital capillary hemangioma. Trans Am Ophthalmol Soc. Peer review under responsibility of Saudi Ophthalmological Society, King Saud University. Computed tomography of orbital lesions. A radiological study of cases. Magnetic resonance imaging of the orbit. Metastases from carcinoid Fig. Khan and Ali R. MR shows isointense Orbital varix signal, and T2 hyperintensity. Axial T2 shows a hyperintense, trans-spatial mass involving radiology intra- and extra-conal compartments. Any part of the nerve may be involved, and radiologic diagnosis can be challenging when only the intracanalicular portion of the nerve is affected. Malignancies that are reviewed include:

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CT shows density similar to skeletal muscle. Schwannoma appears as a varix radiology, ovoid, orbital retrobulbar mass, found in orbital intra- or extra-conal space with the long axis in orbital anterior—posterior direction Fig. Abstract A wide variety of varix radiology occupying lesions may be encountered in the orbit. CT and MR imaging frequently help confirm the presence of a mass and define its extent. This article has been cited by other articles in PMC. Cavernous hemangioma typically appears as a well-circumscribed intraconal mass. All orbital metastases show some degree of MR enhancement. Pediatric head and neck rhabdomyosarcoma. Cavernous hemangioma, capillary hemangioma, dermoid, and rhabdomyosarcoma. Anterior visual pathway gliomas. Orbital varix frequently shows calcification on CT, whereas untreated lymphoma almost never calcifies. True bone invasion and calcifications are rarely seen. A wide variety of radiology can produce space-occupying lesions in and around the orbit.

Smooth, homogeneous spherical mass. Optic nerve sheath meningiomas. Metastatic tumors of the orbit Clinicopathologic features In adults orbital metastases usually arise from carcinomatous origin, in children sarcomatous or neural embryonal tumors are more common. This review focuses on some of the common orbital masses. Nerve sheath tumors can be divided into schwannomas and neurofibromas, which are less common and typically associated with NF The radiological spectrum of orbital pathologies that involve the lacrimal gland and the lacrimal fossa. Malignant tumors of the orbit. Globe retraction is highly suspicious for scirrhous breast cancer metastasis. Nerve sheath tumors Clinicopathologic features Orbital sheath tumors can orbital divided into schwannomas and neurofibromas, which are less common and typically associated with NF Calcification is rare in untreated tumors. Radiology T2 shows a well-defined, hyperintense mass involving the retrobulbar varix extraconal soft tissues, without destruction of the bone or distortion of varix radiology structures. Imaging findings MR is optimal for imaging optic nerve glioma. This article radiology been cited by other articles in PMC. Intraconal location; very bright T2 signal varix hypointense pseudocapsule; and an early nodular enhancement orbital progressive accumulation of contrast on later phase images. Pediatric head and neck rhabdomyosarcoma. Computed tomography of orbital lesions. Septa in between lobules are slightly Venous varix, schwannoma, optic nerve sheath meningioma, and lymphoma. Optic nerve glioma in infancy: The venous component of a lesion will typically enhance, whereas the lymphatic component will only show fine enhancement of septations. Orbital tumors evaluated by computed tomography.

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