十二指腸 じゅうにしちょう潰瘍 かいようじゃないです
ijūni shi chōkaiyōjanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 胃十二指腸潰瘍

1. It's not a gastric/duodenal ulcer.

Negative
Polite
Casual Register