 Patients would be selected from gastroenterology clinic, primary care clinic, surgery clinic, sub-specialty clinics Oncology, Pulmonary and hepatitis C clinic. These clinics would be informed about the ongoing EUS study and the eligibility criterias of the study. All patients will be seen in the gastroenterology clinic where a detail description of the EUS-FNA procedure would be provided to them. In addition, patients would be provided consent forms. Please refer to section 5 for details of the consent process. 