At present, the most important method to detect malignant nodules is fine-needle aspiration biopsy (FNA, but this technique can produce false-negative results, which can delay treatment and lead to local invasion.

• 目前，鉴别恶性节结最重要的手段是细针穿刺（FNA），然而这种方法仍有假阴性，这会导致治疗延误并致使局部转移。