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Italian recommendations for Lambert-Eaton myasthenic syndrome (LEMS) management
1Istituto di Neurologia, Università Cattolica, Roma, Italy, a.evoli@rm.unicatt.it.
Summary
Lambert-Eaton myasthenic syndrome (LEMS) is a rare neuromuscular disorder affecting nerve-muscle communication. Early diagnosis and cancer screening are vital for managing LEMS and associated small-cell lung cancer.
Area of Science:
- Neurology
- Immunology
Background:
- Lambert-Eaton myasthenic syndrome (LEMS) is a rare pre-synaptic neuromuscular disorder.
- It involves antibodies targeting voltage-gated calcium channels at motor nerve terminals.
- LEMS can be under-diagnosed due to slow onset and fluctuating symptoms.
Framework:
- Diagnosis relies on clinical, electrophysiological, and immunological criteria.
- Proximal muscle weakness in limbs is characteristic.
- Autonomic nervous system dysfunction is common, including dry mouth and orthostatic hypotension.
Implementation:
- A significant association exists between LEMS and underlying tumors, primarily small-cell lung cancer (50-60% of cases).
- Neurological symptoms often precede tumor detection.
- Cancer screening is crucial for LEMS management.
Implications:
- The Italian Working Group on Myasthenic Syndromes developed diagnostic and therapeutic algorithms.
- These algorithms aim to guide patient-tailored approaches in clinical practice.
- Improved diagnostic and management strategies can enhance patient outcomes.
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