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03.07.2019 | Original Article

Lymphovascular Invasion as the Major Prognostic Factor in Node-Negative Esophageal Cancer After Primary Esophagectomy

Zeitschrift:
Journal of Gastrointestinal Surgery
Autoren:
Chung-Ping Hsu, Cheng-Yen Chuang, Po-Kuei Hsu, Ling-I Chien, Chih-Hung Lin, Yi-Chen Yeh, Han-Shui Hsu, Yu-Chung Wu
Wichtige Hinweise
Chung-Ping Hsu, Cheng-Yen Chuang and Po-Kuei Hsu contributed equally to this work.

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Abstract

Background

Studies addressing both lymphovascular invasion (LVI) and perineural invasion (PNI) in patients with esophageal squamous cell carcinoma (ESCC) treated with or without neoadjuvant therapy are limited. We aimed to analyze the incidence and prognostic significance of LVI and PNI in patients with thoracic ESCC.

Methods

This retrospective study included 520 patients with ESCC: 174 patients after neoadjuvant treatment followed by surgery and 346 after primary esophagectomy, from two medical centers. The relationships between LVI, PNI, and other histological factors were evaluated. The Cox regression model was used for survival analysis.

Results

Positive LVI and PNI were noted in 35.6% and 22.4% of patients with residual primary tumor after neoadjuvant treatment and in 39.6% and 24.0% of patients who underwent primary esophagectomy, respectively. In patients with neoadjuvant treatments, the 5-year overall survival rates were 12.7% and 28.3% in patients with positive LVI and negative LVI, respectively (p = 0.001). The 5-year overall survival rates were 6.4% and 29.9% in patients with positive PNI and negative PNI, respectively (p < 0.001). In patients who did not receive neoadjuvant treatment, the 5-year overall survival rates were 28.2% and 61.1% in patients with positive LVI and negative LVI, respectively (p < 0.001). The 5-year overall survival rates were 30.2% and 52.5% in patients with positive PNI and negative PNI (p < 0.001). In subgroup analysis, the presence of PNI was an independent prognostic factor in patients with neoadjuvant treatments, whereas the presence of LVI had more significant prognostic impact in patients with node-negative ESCC after primary esophagectomy.

Conclusions

Both LVI and PNI statuses are significant prognostic factors for patients with ESCC. However, the prognostic impact of LVI was majorly in the subgroup of node-negative patients who received primary esophagectomy.

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