腸炎

1. Origins, structure, and basic meaning

• Structure: 腸炎 (ちょうえん) combines intestine 腸 and inflammation 炎 as the disease name enteritis.
• Basic usage: 腸炎だ predicates a diagnosis of enteritis, whereas 腸炎の modifies a following noun.

2. Common pitfalls and similar expressions

• Diagnosis and modification
  • The term names the condition, not any one symptom such as abdominal pain.