Chordomas are rare, occurring in approximately 1 per million individuals each year. Chordomas comprise fewer than 1 percent of tumors affecting the brain and spinal cord.
How many people are affected by chordoma ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by chordoma ? [/INST] \n Chordomas are rare, occurring in approximately 1 per million individuals each year. Chordomas comprise fewer than 1 percent of tumors affecting the brain and spinal cord.</s>