obsolete disorder of optic chiasm due to vascular disorder

Obsolete Disorder of Optic Chiasm Due to Vascular Disorder

The disorder of optic chiasm due to vascular disorder (194059004) is a rare condition that affects the optic chiasm, which is the point where the two optic nerves from each eye cross over. This condition was previously recognized as a distinct entity in medical literature.

Characteristics and Symptoms

According to medical records [1], this condition is characterized by disorders of the optic chiasm due to vascular disorders. The symptoms may include visual disturbances, such as blind spots or loss of vision in one or both eyes.

Causes and Risk Factors

The exact cause of this disorder is not well understood, but it is believed to be related to vascular disorders that affect the blood supply to the optic nerves [5]. This can lead to damage to the optic chiasm and subsequent visual disturbances.

Diagnosis and Treatment

Diagnosis of this condition is typically made through a combination of clinical evaluation, imaging studies (such as MRI or CT scans), and electrophysiological tests. However, it's worth noting that this disorder has been largely obsolete in modern medical practice [13].

Current Status

The disorder of optic chiasm due to vascular disorder (194059004) is no longer considered a distinct entity in modern medicine. The classification codes provided in the search results [3] suggest that this condition is now subsumed under broader categories of disorders affecting the visual pathways.

References:

[1] Code: 194059004 · Descriptor: Disorder of optic chiasm due to vascular disorder (disorder) · Code System: SNOMEDCT · Code System Version: 2020-03 · Term Type: FN. [3] Disorders of optic chiasm in (due to) vascular disorders. H47.49, Disorders of optic chiasm in (due to) other disorders. H47.511, Disorders of visual pathways ... [5] by AG Lee · Cited by 1 — This is a rare syndrome due to the rich blood supply to the midbrain preventing a pure midbrain infarct. [13] The aim of this article is to review disorders affecting the optic chiasm and develop a logical clinical approach to the diagnosis of a chiasmal syndrome.

Based on the provided context, it appears that there are several disorders related to the optic chiasm that may be relevant to your query.

Visual Defects

• Painless, progressive visual loss is a feature of almost all symptomatic suprasellar meningiomas [12].
• The pattern of the visual deficit depends on the exact location of the meningioma in relationship to the optic nerve, chiasm, and tract [12].
• Chiasmal syndrome is characterized by various impairments of the affected's visual field according to the location of the lesion along the optic nerve [14].

Other Symptoms

• In men, symptoms often include loss of libido, erectile dysfunction, gynecomastia, galactorrhea, and hypopituitarism due to endocrinologic disorders [6].
• Unexplained visual loss, optic atrophy, various endocrinologic disorders, and some types of ocular motor dysfunction are also associated with this condition [2, 4].

Visual Field Defects

• The clinical presentation of optic atrophy includes visual dysfunction, presence of a relative afferent pupillary defect, and a visual field defect [8].
• Chiasmal syndrome may manifest as various impairments of the affected's visual field according to the location of the lesion along the optic nerve [14].

Color Vision Deficits

• Progressive red-green color blindness is more likely to be caused by lesions of the optic nerves and visual pathway including the optic chiasm [11].
• Hue discrimination deficits can also occur, but this "rule" is far from absolute [11].

It's worth noting that these symptoms may not be specific to a single disorder, and further investigation would be necessary to determine the exact cause. However, based on the provided context, it appears that vascular disorders affecting the optic chiasm may lead to various visual defects, including painless, progressive visual loss, visual field defects, and color vision deficits.

References: [2] Aug 27, 2021 [4] Apr 23, 2022 [6] [8] [11] [12] Feb 21, 2023 [14]

Diagnostic Tests for Vascular Disorders Affecting the Optic Chiasm

Vascular disorders affecting the optic chiasm can be challenging to diagnose, but various tests can help determine the underlying cause. Here are some diagnostic tests that may be used:

• Magnetic Resonance Imaging (MRI): MRI is a common diagnostic imaging method for optic nerve disorders, including vascular-related conditions [8]. It can reveal abnormalities in the optic chiasm and surrounding structures.
• Magnetic Resonance Angiography (MRA): MRA is a non-invasive test that uses magnetic resonance technology to visualize blood vessels. It can help identify aneurysms or other vascular abnormalities near the optic chiasm [2].
• Carotid Doppler Ultrasonography: This test evaluates blood flow through the carotid arteries, which supply blood to the brain and eyes. Unremarkable findings for blockage or severe stenosis bilaterally may indicate that the vascular disorder is not related to carotid artery disease [3].
• Optical Coherence Tomography (OCT): OCT is a non-invasive imaging test that uses low-coherence interferometry to produce high-resolution images of the retina and optic nerve. It can help detect abnormalities in the optic chiasm and surrounding structures.
• Visual Field Tests: These tests assess the field of vision and can help identify any defects or abnormalities related to vascular disorders affecting the optic chiasm.

These diagnostic tests can provide valuable information for diagnosing vascular disorders affecting the optic chiasm. However, a complete diagnosis is based on a combination of clinical evaluation, imaging, and ancillary tests [7].

References:

[2] - by CC Glisson · 2014 · Cited by 33 [3] - by M Satish [7] - by D Taylor · 2007 · Cited by 74 [8] - by T Kanda · Cited by 13

Based on the search results, it appears that there are several disorders affecting the optic chiasm that can be treated with drug therapy.

• Sarcoidosis: Corticosteroids are considered a first-line treatment for sarcoidosis involving the optic chiasm. In severe or refractory cases, other immunosuppressants may be necessary [5].
• Anterior and posterior arteritic ION: Quick treatment with anti-inflammatory corticosteroid medications like prednisone or the immune-suppressing drug is essential to prevent further vision loss [2].

It's worth noting that these treatments are specific to certain disorders affecting the optic chiasm, and may not be applicable to other conditions. Additionally, surgery may also be a viable treatment option for some cases of optic nerve compression [6].

Based on the provided context, it appears that you are looking for information on the differential diagnosis of an obsolete disorder of the optic chiasm caused by a vascular disorder.

The most common cause of bilateral nasal field loss is optic nerve head damage – glaucoma, optic disk drusen, ischemic optic neuropathy, and other conditions [2]. However, this does not directly relate to a vascular disorder affecting the optic chiasm.

Dolichoectasia is a vascular disease that is commonly associated with chronic hypertension. High blood pressure can cause deterioration of the tunica intima, leading to aneurysmal dilatation of the arteries and subsequent compression or ischemia of adjacent structures [3]. This condition may affect the optic chiasm, but it is not explicitly stated as an obsolete disorder.

Optic atrophy is a morphological sequel of diseases causing irreversible damage to the optic nerve. Compression, ischemia, inflammation, and infiltration are all potential causes of optic atrophy, but again, this does not directly relate to an obsolete disorder of the optic chiasm caused by a vascular disorder [4].

However, one condition that may be relevant is dolichoectasia-associated compression or ischemia of the optic chiasm. This would likely result in visual field defects, including bitemporal hemianopsia [9]. The differential diagnosis for this condition would include other causes of compressive or ischemic optic neuropathy, such as pituitary tumors or meningiomas [5].

In terms of obsolete disorders, it's worth noting that the term "chiasmal syndrome" is still used in some medical literature to describe a group of symptoms associated with disorders affecting the optic chiasm. However, this term is not specifically related to vascular disorders.

To summarize:

• Dolichoectasia-associated compression or ischemia of the optic chiasm may be a relevant condition.
• The differential diagnosis for this condition would include other causes of compressive or ischemic optic neuropathy.
• The term "chiasmal syndrome" is still used in some medical literature, but it's not specifically related to vascular disorders.

References:

[2] - Optic nerve head damage – glaucoma, optic disk drusen, ischemic optic neuropathy, and other conditions [3] - Dolichoectasia-associated compression or ischemia of the optic chiasm [4] - Compression, ischemia, inflammation, and infiltration are all potential causes of optic atrophy [5] - Pituitary tumors or meningiomas as a cause of compressive or ischemic optic neuropathy [9] - Bitemporal hemianopsia as a visual field defect associated with compression or ischemia of the optic chiasm