Congenital NCL is the rarest type of NCL; approximately 10 cases have been described.
How many people are affected by congenital neuronal ceroid lipofuscinosis ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by congenital neuronal ceroid lipofuscinosis ? [/INST] \n Congenital NCL is the rarest type of NCL; approximately 10 cases have been described.</s>