Navigating the lymphatic labyrinth: insights into lateral cervical metastasis patterns in papillary thyroid carcinoma...

Area of Science:

• Oncology
• Surgical Pathology
• Anatomy

Background:

• Papillary thyroid carcinoma (PTC) commonly metastasizes to lateral cervical lymph nodes (LNs), but drainage patterns are not well understood.
• The Delphian lymph node (DLN) is a key indicator of regional LN involvement in PTC, yet its predictive role and impact on other LNs require clarification.

Purpose of the Study:

• To investigate the reticular structure and metastatic patterns of lateral cervical LNs in PTC.
• To clarify the role of the Delphian lymph node (DLN) in predicting regional LN metastasis and its relationship with other cervical LNs.

Main Methods:

• Analysis of 3,356 PTC patients' surgical data.
• Independent pathological evaluation of primary tumors and eight LN regions.
• Statistical analysis including t-tests, chi-square tests, Kaplan-Meier survival analysis, propensity-score matching, and multivariate Cox regression.

Main Results:

• A novel reticular structure model for lateral cervical LNs was proposed, highlighting interconnectedness.
• Delphian lymph node (DLN) positive patients showed significantly higher rates of metastasis in central and lateral cervical regions.
• DLN status correlated with increased metastatic regions, total LNs, and contralateral metastasis, underscoring its prognostic significance.

Conclusions:

• The study identifies the Delphian lymph node (DLN) as a central component within the reticular structure of cervical LNs.
• The DLN demonstrates significant connectivity with other regional lymph node levels, influencing PTC metastasis and prognosis.