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.
Outpatient treatment, where the patient visits the hospital but does not stay overnight.
Outpatient (department or visit); contrasts with 入院 (inpatient).
Compound of 入院 (hospitalization) + 治療 (treatment).