骨芽 こつが細胞 さいぼう しゅじゃありませんでした
kotsuga saibō shujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 骨芽細胞腫

1. Was not osteosarcoma.; Was not a bone tumor.

Past/Perfective
Negative
Polite
Terminal Form
Medicine