Abstract:

Papillary thyroid microcarcinoma (PTMC), a ≤1 cm-diameter thyroid papilloma (PTC), is a relatively inert subtype of thyroid cancer with low malignancy and relatively good overall prognosis. Local lymph node metastasis, on the other hand, is still susceptible to early stages of the disease, and there is a risk of recurrence after surgery. Thyroid papilloma cancer neck lymph node metastasis occurs in the central region, whereas the pre-throat lymph nodes, also known as Delphain lymph nodes (DLN), as the central region of the sub-region lymph nodes, has been confirmed as the most commonly transferred local lymph node region of PTC, and also a sign of PTMC's poor prognosis. Thyroid aggression and isthmus strain, tumor polysacousticity, capsule aggression, lymphatic vascular aggression, and other factors are thought to be high risk factors for DLN metastasis. There is currently relatively little association between DLN metastasis and the course of PTMC disease, thus this study analyzes the law of DLN metastasis and risk factors, the relevance of DLN metastasis for PTMC patients' operation scope and prognosis, and so on.

Key words: Carcinoma, papillary, Neck dissection, Central lymph node metastasis, Surgical scope