prececal lymph nodes

例句：

1. 1. The doctor performed a biopsy on the pre-colonic lymph nodes to investigate the cause of the patient's symptoms.
   医生对前肠淋巴结进行了活检，以调查患者症状的原因。
2. 2. Pre-colonic lymph nodes are often enlarged due to infection or inflammation.
   由于感染或炎症，前肠淋巴结通常会变得肿大。
3. 3. In some cases, the presence of pre-colonic lymph nodes may indicate a need for further testing or treatment.
   在某些情况下，前肠淋巴结的存在可能表明需要进一步的测试或治疗。