noun
hospital treatment; inpatient treatment
Refers to medical care received while admitted to a hospital, as opposed to outpatient care.
彼は肺炎で入院治療を受けた。
He received inpatient treatment for pneumonia.
入院治療が必要かどうか、医師が判断します。
The doctor will decide whether hospital treatment is necessary.
Compound of 入院 (hospitalization) + 治療 (treatment).