Metastasis predictors for neck sublevel IIb in papillary thyroid carcinoma.

Area of Science:

• Oncology
• Surgical Oncology
• Head and Neck Surgery

Background:

• Papillary thyroid carcinoma (PTC) can metastasize to lateral neck lymph nodes.
• Predicting metastasis to specific neck sublevels, like IIb, is crucial for effective surgical planning.
• Ultrasound-guided fine-needle aspiration biopsy (FNAB) is a common diagnostic tool for lymph node assessment.

Purpose of the Study:

• To identify predictors for metastasis in neck sublevel IIb in PTC patients with lateral neck metastasis.
• To evaluate the reliability of preoperative ultrasound-guided FNAB for detecting lymph node metastasis in sublevel IIa.

Main Methods:

• Prospective study involving 53 patients with proven lateral neck metastases from PTC.
• Analysis of potential predictive factors for sublevel IIb metastasis.
• Assessment of ultrasound-guided FNAB accuracy against definitive histopathological analysis.
• Minimum 10-year follow-up for local recurrence.

Main Results:

• Statistically significant predictors for sublevel IIb metastasis include positive sublevel IIa, number of positive lymph nodes, and involvement of levels IIa, III, IV, and V.
• No local recurrence was observed in operated lateral levels among patients with a minimum 10-year follow-up.
• Preoperative ultrasound-guided FNAB demonstrated high reliability in detecting positive lymph nodes in sublevel IIa.

Conclusions:

• Positivity of sublevel IIa is the most clinically significant predictor for sublevel IIb metastasis in PTC.
• Preoperative assessment of sublevel IIa is essential for determining the extent of neck dissection, including sublevel IIb.
• Ultrasound-guided FNAB is a reliable method for preoperative staging of sublevel IIa lymph nodes.