黑料网

Sarcoidosis is a chronic multisystem granulomatous disease that commonly affects the neurological and visual systems. The estimated ocular involvement in sarcoidosis is between 25 and 63%. Ocular sarcoidosis has a bimodal presentation with the first between 20 and 30 and the second after 50 years of age. Ocular or neuro-ophthalmological sarcoidosis may be the initial manifestation of sarcoidosis or develop during the disease course (Niederer et al., 2021). However, it is not uncommon for patients to present with neuro-ophthalmological manifestations of sarcoidosis without ocular involvement. Since the publication of this paper there have been significant improvements in the reporting of ocular sarcoidosis in observational studies [2]. Biopsy in patients with neuro-ophthalmological manifestations is often challenging and not without risks hence the reliance on the diagnostic criteria. Similarly, there may be neuro-ophthalmic manifestations of sarcoidosis without ocular involvement. Currently there is a diagnostic framework for ophthalmic manifestations of neuro-sarcoidosis.

Neuro-ophthalmological manifestations of sarcoidosis

Optic neuropathy: Sarcoidosis can lead to inflammation of the optic nerve, causing optic neuropathy. This can result in visual loss, reduced color vision, and visual field defects.

Anterior uveitis: Inflammation of the uvea (the middle layer of the eye) is common in sarcoidosis. Anterior uveitis can lead to eye pain, photophobia, and blurred vision [3].

Cranial nerve palsies: Sarcoidosis can affect the cranial nerves, leading to double vision and other eye movement abnormalities.

Orbital involvement: In severe cases, sarcoidosis can involve the tissues surrounding the eye (orbit). This may cause proptosis (bulging eyes), periorbital edema, and compressive optic neuropathy.

Dry eye syndrome: Sarcoidosis can affect the lacrimal glands, leading to dry eye symptoms.

Paradoxical pupillary reaction: Sarcoidosis can affect the pupillary reflexes, leading to paradoxical responses to light, where the pupil constricts when exposed to light and dilates in darkness.

Neuro-ophthalmic manifestations of acute leukemia

Optic Nerve Infiltration: Leukemic cells can infiltrate the optic nerve, leading to optic nerve swelling, visual disturbances, and reduced visual acuity [4].

Retinal hemorrhages: Leukemia can affect blood clotting, leading to retinal hemorrhages, which can cause floaters and vision loss.

Cranial nerve palsies: Acute leukemia can affect the cranial nerves, causing double vision, ptosis (drooping eyelid), and abnormal pupillary responses. Cranial nerve palsies refer to a group of neurological conditions characterized by dysfunction or weakness of one or more of the twelve cranial nerves, which emerge directly from the brain or brainstem. These cranial nerves are responsible for various functions, including controlling eye movement, facial muscles, taste sensation, swallowing, and more. Cranial nerve palsies can result from various causes, including trauma, infections, inflammation, tumors, and vascular issues. The specific symptoms and consequences depend on the affected cranial nerve and its function. Here are some common cranial nerve palsies [5 -7 ].

Intracranial bleeding: Leukemia patients may be at higher risk of intracranial bleeding, which can cause various neurological symptoms, including visual disturbances if it affects the visual pathways.

Orbital involvement: Leukemia can spread to orbital structures,causing proptosis, periorbital swelling, and compressive optic neuropathy.

Neurologic symptoms: Some leukemia patients may develop other neurological symptoms, such as headaches, confusion, or seizures, which can indirectly affect vision and the eyes.

Optical coherence tomography (OCT) :It is a non-invasive imaging technique commonly used in ophthalmology to visualize and assess the structures of the eye, particularly the retina. OCT uses lowcoherence interferometry to create high-resolution, cross-sectional images of the various layers of the eye. It provides valuable information about the retina, optic nerve, and other eye structures. Here's an overview of how OCT works and its applications [8 ].

While both sarcoidosis and acute leukemia can have neuroophthalmological manifestations, the underlying mechanisms and treatments are different. In both cases, early diagnosis and management are crucial. Patients with these conditions may require the expertise of multiple specialists, including neurologists, ophthalmologists, hematologists, and oncologists, to provide comprehensive care. The specific symptoms and course of these conditions can vary from person to person, making individualized evaluation and treatment important.

Conclusion

These neuro-ophthalmic manifestations are not unique to leukemia and can occur in various other medical conditions. However, if you have leukemia or are at risk of leukemia and experience any of these symptoms, it is crucial to seek immediate medical attention. Leukemia is typically managed by a team of healthcare professionals, including hematologists, oncologists, and sometimes neurologists or ophthalmologists, depending on the specific manifestations and complications. Treatment options for leukemia may include chemotherapy, radiation therapy, bone marrow transplantation, and other targeted therapies. While both sarcoidosis and acute leukemia can have neuro-ophthalmological manifestations, the underlying mechanisms and treatments are different. In both cases, early diagnosis and management are crucial. Patients with these conditions may require the expertise of multiple specialists, including neurologists, ophthalmologists, hematologists, and oncologists, to provide comprehensive care. The specific symptoms and course of these conditions can vary from person to person, making individualized evaluation and treatment important. Cranial nerve palsies can be caused by various underlying conditions, including neurological disorders, infections, head trauma, tumors, and vascular problems. Treatment options depend on the underlying cause and may include medications, surgery, physical therapy, or management of the associated condition. Neurologists, ophthalmologists, and other medical specialists often collaborate to diagnose and manage cranial nerve palsies effectively.

1. Twelves D, Perkins KS, Counsell C (2003) .Mov Disord 18:19-31.

, ,

2. Schrag A, Horsfall L, Walters K, et al. (2015) .Lancet Neurol 1:57-64.

, , Crossref

3. Driver JA, Logroscino G, Gaziano JM, et al. (2009) .Neurology 72:32-38.

, , Crossref

4. De Lau LM, Breteler MM (2006) .Lancet Neurol 5:525–535.

, ,

5. Miller IN, Cronin-Golomb A (2010) .Mov Discord25:2695–2703.

, , Crossref

6. Kleihues P, Louis DN, Scheithauer BW, et al. (2002) J Neuropathol Exp Neurol 61:215-225.

, ,

7. Reivich M, Kuhl D, Wolf A, et al. (1979) The [18F] .Circ Res.44:127-137.

, ,

8. Spence AM, Muzi M, Mankoff DA, et al. (2004) .J Nucl Med 45:1653-1659.

,