noun
underlying disease; pre-existing condition
Medical term for a chronic or pre-existing illness that makes a patient more vulnerable to other conditions or complications. Commonly used in clinical contexts and public health discussions.
高血圧や糖尿病などの基礎疾患がある人は、感染症にかかりやすい。
People with underlying conditions such as high blood pressure or diabetes are more susceptible to infectious diseases.
医師は患者の基礎疾患を考慮して治療方針を決めた。
The doctor decided on a treatment plan taking the patient's underlying illness into account.