Risk factors for lymph node metastasis and surgical scope in patients with cN0 non-small cell lung cancer: a single-center study in China.

BACKGROUND: It is difficult to determine the lymph node metastasis of patients with clinically negative lymph nodes (cN0) non-small cell lung cancer (NSCLC) before surgery. The purpose of this study is to investigate risk factors of lymph node metastasis in cN0 NSCLC, thereby to identify the surgical indications for lymph node dissection in cN0 NSCLC. METHODS: We conducted a retrospective study of patients with tumor size ≤ 30 mm who underwent radical resection of NSCLC. Binary logistic regression analysis was applied to predict risk factors for lymph node metastasis, and subject operating characteristics (ROC) curve was used to evaluate the independent risk factors. RESULTS: Overall, 44 patients (6.8%) with cN0 NSCLC had lymph node metastasis. Factors of tumor consolidation diameter (p < 0.001) and preoperative serum carcinoembryonic antigen (CEA) level (p = 0.017) are independent risk factors lymph node metastasis in cN0 NSCLC. The ROC curve showed that the cut-off value of consolidation diameter was 16.5 mm, and the area under the curve (AUC) was 0.825 (p < 0.001, 95% CI 0.780-0.870); the cut-off value of serum CEA level was 1.765 µg/L, and the AUC was 0.661 (p < 0.001, 95% CI: 0.568-0.754). Moreover, 8 of 461 patients with tumor parenchyma ≤ 16.5 mm had lymph node metastasis, and 36 of 189 patients with tumor parenchyma > 16.5 mm had lymph node metastasis. CONCLUSION: Tumor consolidation diameter and preoperative serum CEA are independent factors to predict cN0 NSCLC with tumor size ≤ 30 mm. For patients with tumor parenchyma > 16.5 mm, the probability of lymph node metastasis is higher and lymph node dissection is recommended. For patients with tumor parenchyma ≤ 16.5 mm, the probability of lymph node metastasis is lower and lymph node sampling is feasible.

Effect of complete lung cancer resection on the balance of Th17/Treg in the peripheral blood of patients / 实用肿瘤学杂志

Objective The aim of this study was to investigate the effect of complete lung cancer resection on the balance of Th17/Treg cells in the peripheral blood of lung cancer patients. Methods Flow cytometry was used to detect the percentage of Th17 and Treg cells in the peripheral blood of 21 patients with lung cancer before and after operation and 21 healthy controls. RT-PCR was used to detect the expression of fork-head/winged helix transcription factor( Foxp3) and retinoic acid-related orphan receptor γt ( RORγt)in PBMC. The plasma levels of interleukin(IL) -17 and transforming growth factor(TGF) -β1 were detected by enzyme-linked immunosorbent assay(ELISA). Results After surgery,the percentage of Th17 cells in the peripheral blood decreased and the percentage of Treg cells increased in patients when compared to the pre -operation ( P <0. 01). After surgery,the expression of RORγt was decreased and the expression of Foxp3 was increased in the CD4 +T cells of patients in comparison with the pre-opera-tion(P<0. 01). After surgery,the expression of IL-17 was decreased and the expression of TGF-β1 was increased in the plasma of patients in comparison with the pre -operation( P <0. 01). In addition,the percentage of Th17 and Treg cells,the expression of RORγt and Foxp3,and the expression of IL-17 and TGF-β in the peripheral blood were increased in preoperative lung cancer pa-tients when compared to healthy controls. Conclusion There is a Th17/Treg imbalance in the peripheral blood of lung cancer pa-tients after complete resection of lung cancer.

Risk factors and clinical indication of metastasis to lymph nodes posterior to right recurrent laryngeal nerve in papillary thyroid carcinoma: a single-center study in China.

BACKGROUND: Lymph nodes posterior to right recurrent laryngeal nerve (PRRLN) may be frequently overlooked during central compartment dissection (CCD) for papillary thyroid carcinoma (PTC). The purpose of this study was to investigate risk factors of lymph node PRRLN metastasis in right-sided PTC, thereby to identify the indications for lymph node PRRLN dissection. METHODS: We conducted a retrospective study of patients with right-sided PTC who underwent a thyroidectomy plus lymph node PRRLN dissection during ipsilateral CCD. RESULTS: Overall, 108 patients (26.7%) had lymph node PRRLN metastases, including 26 (6.4%) who presented with solely lymph node PRRLN positivity. Factors of extrathyroidal extension, multifocality, larger tumor (≥1 cm), level VIa positivity (p < .0001 for each), and lateral compartments positivity (p = .0002) significantly predicted lymph node PRRLN metastasis in right-sided PTC. CONCLUSION: Lymph node PRRLN should be routinely explored during CCD because of the possibility of only involvement in PTC. Factors of tumors larger than 1 cm, multifocality, and extrathyroidal extension were independent predictors of lymph node PRRLN metastasis in right-sided PTC, and suggested the clinical indications of lymph node PRRLN dissection.

Prospective analysis of the risk factors and clinical indications of dissection of lymph node posterior to right recurrent laryngeal nerve in 283 cases of papillary thyroid carcinoma / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the risk factors for metastasis and clinical indications for dissection of lymph node posterior to right recurrent laryngeal nerve (LN-prRLN) in papillary thyroid carcinoma (PTC).</p><p><b>METHODS</b>A prospective analysis including 283 consecutive patients with PTC who underwent total thyroidectomy with routine central lymph node dissection (CLND) in our hospital from Jan. 2010 to Jan. 2012 was performed. The right paratracheal lymph nodes in the central compartment lymph nodes (CCLN) were divided into the anterior (level VIa) and posterior (level VIb) compartments by recurrent laryngeal nerve (RLN), and were removed respectively. The complications and recurrences were recorded with a follow-up of 3 months to 3 years.</p><p><b>RESULTS</b>CCLN metastases were present in 47.7% (135/283) of the patients, and level VIb metastases were present in 27.2% (77/283) of the patients. The incidence of level VIb metastasis was 20.5% (58/283) in level VIa-positive patients, while 6.7% (19/283) in level VIa-negative patients. Complications of level VIb dissection were found in 4.9% (14/283) of all patients. 2.1% (6/283) of all patients were diagnosed with regional recurrence during the 3-year follow-up. Univariate analysis revealed that level VIb metastasis was significantly associated with tumor size, number, extrathyroidal invasion, clinical nodal stage, level VIa and lateral lymph node metastases. Multivariate analysis revealed that tumor larger than 1 cm, multifocality, extrathyroidal invasion, level VIa and lateral lymph node metastases were independent risk factors for level VIb metastasis.</p><p><b>CONCLUSIONS</b>Lymph node posterior to right recurrent laryngeal nerve can be the only site of metastasis from PTC without other cervical compartment involvements. Therefore, routine intraoperative detection of these nodes may be necessary for patients with right PTC, and dissection should be considered when a right-side PTC tumor is larger than 1 cm, multifocality, with extrathyroidal invasion or cervical nodal metastases.</p>