Endoscopic biopsy

Predictors of Prognosis in IBD Patients

Berzosertib and Irinotecan in Treating Patients With Progressive, Metastatic, or Unresectable TP53 Mutant Gastric or Gastroesophageal Junction Cancer

Cancer Preventive Vaccine Nous-209 for Lynch Syndrome Patients

Dietary Sugar Absorptive Phenotype for Prediction of Weight Loss Outcome

Chemoradiation and Pembrolizumab Followed by Pembrolizumab and Lenvatinib Before Surgery for the Treatment of Non-metastatic Esophageal or Esophageal/Gastroesophageal Junction Cancer

FOLFOX, Botensilimab, and Balstilimab for the Treatment of Localized Rectal Cancer Before Surgery

IDENTIFICATION OF PROGNOSTIC AND PREDICTIVE BIOMARKERS IN INFLAMMATORY BOWEL DISEASE

Bevacizumab, Combination Chemotherapy, and Radiation Therapy in Treating Patients Undergoing Surgery For Locally Advanced Pancreatic Cancer

Distribution of Helicobacter Pylori After Gastrectomy

Endoscopy Every 2 Years or Only as Needed in Monitoring Patients With Barrett Esophagus

Rapid Urease Test for Diagnosis of H. Pylori Infection in Patients With Peptic Ulcer Bleeding

Fluorescent Light Bronchoscopy Plus White Light Bronchoscopy for Early Detection of Lung Cancer

Nipple Aspiration, Ductal Lavage, and Duct Endoscopy in Screening Women at Moderate-to-High Risk of Developing Breast Cancer

Studying Biomarkers in Tumor Tissue and Blood Samples From Patients Undergoing Chemotherapy and Radiation Therapy for Stage II or Stage III Rectal Cancer That Can Be Removed By Surgery

Screening Methods in Finding Lung Cancer Early in Current or Former Smokers

S-1, Cisplatin, and Radiation Therapy in Treating Patients With Stage IIA, Stage III, or Stage IVA Esophageal Cancer That Can Be Removed by Surgery