G90-G99: Other disorders of the nervous system

G93: Other disorders of brain

The group of conditions classified under "Other Disorders of the Brain" are a variety of neurological conditions that involve the brain but are not categorized under other specific conditions. The causes may range widely depending on the specific condition and may involve genetic factors, injuries, infections or diseases affecting other parts of the body. These conditions commonly present with symptoms such as headaches, seizures, changes in personality or behavior, movement problems, or trouble with thinking and memory. The progression of these diseases also differs with each specific condition, though many may involve a gradual worsening of symptoms. Various systems of the body can be affected due to the brain's role in controlling many bodily functions. It’s also important to note that people with these conditions may experience varying degrees of these symptoms based on the specifics of their individual condition. These disorders are typically diagnosed through a variety of tests such as imaging studies, blood tests, and neurological examinations.