"Appendix"

An example sentence;
A friend of mine had his appendix out and it cost $12,000.

Speaking of "appendix", it's a thing attached additionally, such as something in the last of books.

I didn't know it has the meaning of typhlon.
Hmm... Typhlon is a kind of additional thing in human body. I see.

By the way, the operation for appendicitis costs no less than $12,000!? It's too expensive! I checked its cost in Japan. It's about 300,000 - 400,000 yen. (2,721 - 3,628US$, 1,860 - 2,480EUR.)
I can't be sick in the US!