Risk Factors of Lymph Node Metastasis in Superficial Esophageal Squamous Cell Carcinoma

Objective To identify the pathological features of superficial esophageal carcinoma and esophageal intraepithelial neoplasia resected through endoscopic submucosal dissection (ESD). Methods The clinical and pathologic profiles of 130 cases were reviewed, including gross type, histology type, infiltration depth, infiltrative growth pattern, presence of tumor budding, lymphatic and vascular invasion, and margin status. Results The patients had a median age of 62 years old. The predominant gross type was mixed type (78/130,60.0%), followed by Type 0-Ⅱ(49/130,37.7%). The longest diameter of lesionshad a median of 13.8 mm. Morphologically, there were 3 cases (2.3%) of undetermined dysplasia, 25 cases (19.2%) of low grade intraepithelial neoplasia, 56 cases (43.1%) of high grade of intraepithelial neoplasia, and 46 cases(35.4%) of invasive carcinoma. No correlation was found between histological type and gross type. Intramucosal and submucosal invasive carcinoma accounted for 87.0% (40/46) and 13.0% (6/46) of the cases, respectively; sm1 and sm2 accounted for 4.3%(2/46) and 8.7%(4/46) of the cases, respectively. Infiltrative growth pattern was identified as infiltrative growth pattern (INF)a (23/46, 50.0%), INFb (17/46, 37.0%) and INFc (6/46, 13.0%). Tumor budding was found in 3 cases and lymphatic and vascular invasion was found in 2 cases.Margin was positive in 30 cases (23.1%). Invasive carcinomahad a higher margin positive rate (24/46, 52.1%） than low grade intraepithelial neoplasia (1/25, 4.0%)