胃炎

1. Origins, structure, and basic meaning

• Structure: 胃炎, read いえん, is the medical noun gastritis.
• Basic usage: 軽い胃炎だ states a diagnosis; 胃炎の治療中 identifies the condition currently being treated.

2. Common pitfalls and similar expressions

• Diagnosis and treatment context
  • だ predicates the diagnosis, while の治療中 links gastritis to ongoing treatment; it does not mean any stomach pain.