text: <unk> , or<unk> , sometimes called Riley-Day syndrome is a disorder of the autonomic nervous system which affects the development and survival of sensory, sympathetic and some parasympathetic neurons in the autonomic and sensory nervous system resulting in variable symptoms including: insensitivity to pain, inability to produce tears, poor growth, and labile blood pressure (episodic hypertension and postural hypotension). People with<unk>  have frequent vomiting crises, pneumonia, problems with speech and movement, difficulty swallowing, inappropriate perception of heat, pain, and taste, as well as unstable blood pressure and gastrointestinal dysmotility.<unk>  does not affect intelligence. Originally reported by Riley, et al. in 1949,<unk>  is one example of a group of disorders known as hereditary sensory and autonomic neuropathies HSAN. All HSAN are characterized by widespread sensory dysfunction and variable autonomic dysfunction caused by incomplete development of sensory and autonomic neurons. The disorders are believed to be genetically distinct from each other.
option_0: Familial dysautonomia
option_1: Bartter syndrome
option_2: Pseudo-Bartter syndrome
option_3: Avasthey syndrome
option_4: Blind loop syndrome
option_5: West syndrome
option_6: Achard-Thiers Syndrome
option_7: Grange syndrome