<s>[INST] <<SYS>> This is a medical question of type : outlook <</SYS>> What is the outlook for Corticobasal Degeneration ? [/INST] Corticobasal degeneration usually progresses slowly over the course of 6 to 8 years. Death is generally caused by pneumonia or other complications of severe debility such as sepsis or pulmonary embolism. </s>