Overview
Paraneoplastic encephalomyelitis refers to a group of neurological disorders associated with malignancies, characterized by autoimmune responses often mediated by autoantibodies due to molecular mimicry between tumor antigens and self-antigens 12. These syndromes can affect both afferent and efferent visual pathways, often preceding the diagnosis of underlying cancer 13.Diagnosis
Clinical presentation with systemic malignancy and neurological symptoms
Presence of specific autoantibodies (e.g., anti-Hu, anti-Yo, anti-Ri) can aid diagnosis but is not definitive 12
Neuro-ophthalmologic evaluations including visual acuity, pupillary reflexes, and eye movement assessments 3
Imaging studies (MRI, CT) to rule out local tumor invasion 1Management
Treatment primarily targets the underlying malignancy 1
Immunosuppressive therapy (e.g., corticosteroids, intravenous immunoglobulin) for managing autoimmune manifestations 1
Specific symptomatic treatments:
- Myasthenia Gravis: acetylcholinesterase inhibitors (e.g., pyridostigmine) 1
- Lambert-Eaton Myasthenic Syndrome: 3,4-diaminopyridine 1
Supportive care for neurological deficits 1Special Populations
Pediatrics: Neurological syndromes can occur with neuroblastoma 1
Elderly: Increased complexity in diagnosis due to comorbidities; careful evaluation essential 1
Comorbidities: Presence of other autoimmune conditions may complicate management 1Key Recommendations
Consider paraneoplastic encephalomyelitis in patients with unexplained neurological symptoms and a history of malignancy (Evidence: Moderate 13)
Utilize autoantibody testing to support diagnosis but recognize its limitations (Evidence: Moderate 12)
Aggressive management of underlying cancer is crucial for potential neurological improvement (Evidence: Expert opinion 1)References
1 Parrado-Carrillo A, Alcubierre R, Camós-Carreras A, Sanchez-Dalmau BF. Paraneoplastic syndromes in ophthalmology. Archivos de la Sociedad Espanola de Oftalmologia 2022. link
2 Bussat A, Langner-Lemercier S, Salmon A, Mouriaux F. Paraneoplastic syndromes in ophthalmology. Journal francais d'ophtalmologie 2018. link
3 Gordon LK. Paraneoplastic Syndromes in Neuro-Ophthalmology. Journal of neuro-ophthalmology : the official journal of the North American Neuro-Ophthalmology Society 2015. link