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Progressive motor quadriparesis with wasting: a diagnostic conundrum

The case of a man in his early 30s, presenting with slowly progressive, asymmetrical onset, pure motor quadriparesis over 9 months with bulbar involvement, absence of upper motor neuron features and significant weight loss, is reported. In view of presentation with diffuse lower motor neuron involvement of short duration, the diagnostic possibilities are discussed. Apart from motor neuron disease, its mimics including muscle and neuromuscular junction disorders were also considered and evaluated for. Carefully assessed clinical and electrophysiological markers which finally clinched the diagnosis of the rare disorder Lambert-Eaton myasthenic syndrome are elaborated. In the present context, recognition of the oddities on clinical and laboratory evaluation is of paramount importance to rule in causes of pure motor quadriparesis.