Children and Adults With Chordoma

Background: Chordoma is a rare type of bone cancer. It occurs in the skull base or spine. Researchers want to study people with chordoma in different ways. They hope this will help them design better future treatments and supportive care studies for this disease. Objective: To learn more about chordoma by looking at its clinical course, how it appears on imagine scans, and how it responds to therapies and treatments. Eligibility: People ages 2 and older with chordoma who are enrolled in NCI protocol 19-C-0016 Design: Participants will be screened with their medical history. Participants will have a visit to examine their disease. This will include: * Physical exam * Neurologic exam * CT scan and MRI: Participants will lie on a table. The table will slide into a machine. The machine will take pictures of the body. Participants will have other tests every 6-12 months: * Smell test * Surveys to assess their emotional, physical, and behavioral well-being and needs * Cognitive function tests Participants or their home doctors will be contacted every 6 12 months. They will be asked to provide information about their disease. This could include test results and imaging evaluations. Some participants may be asked to come to the clinic for more visits.