<qa>  What is the diagnostic accuracy of EUS for detection of the liver tumors?1.5 Rationale for the study. The diagnostic accuracy of EUS for detection of the liver tumors primary and metastatic remains unknown. There is sufficient evidence to suggest that EUS may be superior to the CT scan for the liver metastases. Studies that have evaluated the role of EUS are limited by small sample size or retrospective design. Therefore, a prospective study with adequate sample size is required to determine the diagnostic accuracy of endoscopy ultrasound. 