A patulous eustachin tube may be associated with a number of risk factors.
Head and neck surgery:
(1) resection of nasopharyngeal cancer
(2) correction of a cleft palate
(3) percutaneous micro-compression for trigeminal neuralgia
Weight loss:
(1) following bariatric surgery
(2) anorexia nervosa
Medications:
(1) amantadine
(2) diuretics
Hormonal:
(1) pregnancy
(2) oral contraceptives
(3) other causes of increased levels of estrogens
CNS lesion that affects the function of the palatal muscles:
(1) stroke
(2) multiple sclerosis
(3) motor neuron disease
Other:
(1) conditions associated with elevated prostaglandins
(2) hemodialysis
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Specialty: Otolaryngology