Another rare form of TSD, the symptoms of late-onset TSD develop later in life, usually during the teenage years or early adulthood (NHS). Its symptoms include slurred speech, loss of balance and coordination, tremor of the hands, and muscle cramps, twitching, and weakness (NHS). Around 1 in 3 people with late-onset Tay-Sachs disease also develop mental health conditions, such as bipolar disorder or psychosis (NHS). Unlike other forms of the condition, late-onset Tay-Sachs disease doesn't always shorten life expectancy (NHS).
