I am not a physician but my husband's chordoma caused him to have double vision. That was the only reason he went to doctors originally.

A chordoma is a rare type of cancer that develops from the notochord. The notochord forms the early spine in a foetus as it develops inside the womb. After about six months, most of the notochord is replaced by the bones of the spine. However, small amounts of the notochord may remain, and these can sometimes develop into a chordoma.

The ball on the tip of a ferrets tail is called a chordoma and needs to be removed by a veterinarian

The big lump a the end of your ferrets tail is called a chordoma and will need to be surgically removed because it is cancerous. Contact your veterinarian for advice.

My husband was diagnosed with Chordoma in 2008 of the thorascic spine t4, t5, and t6. The entire tumor was removed...bone and all in a 2 day 21 hour surgery. His titanium rods broke in June of 2010, and another tumor was removed in Feb. 2011. He took some radiation therapy after the 2nd tumor. He has many symptoms we can't explain to this day...and feels really bad most of the time. He has an MRI scheduled, but has yet to take it. We have to go soon, or the orders will expire...not that he couldn't get another one. He is only 41, and I am very worried about him.