Lymph Node Metastasis in Early Esophageal Squamous Cell Carcinoma

This study uses CT scan images and pathology reports from patients with early-stage esophageal squamous cell carcinoma (a type of cancer in the food pipe) to develop tools that can predict whether the cancer has spread to nearby lymph nodes — helping doctors plan surgery more precisely. **You may be eligible if:** - You have been diagnosed with early-stage (T1) esophageal squamous cell carcinoma confirmed by pathology - You had a contrast CT scan of the chest within 2 weeks before surgery - You have not received any treatment before your surgical resection **You may NOT be eligible if:** - You received chemotherapy, radiation, or endoscopic treatment before surgery - Your CT imaging was of poor quality or insufficient - Your pathology results are incomplete - Your cancer has already spread to other parts of the body Talk to your doctor to see if this trial is right for you.