hilar lymph node enlargement insarcoidosis

例句：

1. 1. The hilar lymph node enlargement is a common symptom of cancer.
   淋巴结肿大是癌症的常见症状。
2. 2. The patient's hilar lymph node enlargement was due to an infection.
   患者的淋巴结肿大是由于感染引起的。
3. 3. The doctor performed a biopsy on the hilar lymph node to determine the cause.
   医生对淋巴结进行了活检，以确定原因。