Prader-Willi-like syndrome is a rare, genetic, endocrine disease characterized by manifestations of a Prader-Willi syndrome phenotype (including obesity, hyperphagia, hypotonia, psychomotor delay, intellectual disability, small hands/feet, hypogonadism, growth hormone deficiency and characteristic facial features) ocurring in the absence of 15q11-q13 genomic abnormalities.

Seizures are an intermittent abnormality of the central nervous system due to a sudden, excessive, disorderly discharge of cerebral neurons and characterized clinically by some combination of disturbance of sensation, loss of consciousness, impairment of psychic function, or convulsive movements. The term epilepsy is used to describe chronic, recurrent seizures.