<unk>  occurs in all ethnic groups and both sexes. It most commonly affects women under 40 and people from 50 to 70 years old of either sex, but it has been known to occur at any age. Younger people rarely have thymoma. Prevalence in the United States is estimated at between 0.5 and 20.4 cases per 100,000, with an estimated 60,000 Americans affected. Within the United Kingdom, an estimated 15 cases of<unk>  occur per 100,000 people.
Myasthenia gravis
Guillain–Barré syndrome
Congenital myasthenic syndrome
Botulism
Neurasthenia
Organophosphate poisoning
Polymyositis
Brainstem stroke syndrome