骨芽 こつが細胞 さいぼう しゅじゃなかったです
kotsuga saibō shujanakattadesu

Noun
Desu Copula

The polite, past negative form of 骨芽細胞腫

1. It wasn't osteosarcoma.

Past/Perfective
Negative
Polite
Casual Register
Medicine