[Diagnostic difficulty, with special reference to an atypical case and its diagnosis].
D000293:Adolescent; D000367:Age Factors; D000690:Amyotrophic Lateral Sclerosis / Q000175:diagnosis*; D004576:Electromyography; D006801:Humans; D008297:Male; D009135:Muscular Diseases / Q000175:diagnosis*; D010243:Paralysis / Q000175:diagnosis