 Endoscopic ultrasound EUS has become the modality of choice for imaging the gastrointestinal wall and surrounding structures. EUS is not only used for diagnostic purposes but is also useful in tissue acquisition by fine needle aspiration FNA thus helping in diagnosis and treatment of various lesions. EUS-FNA is being routinely used to sample various cystic and solid lesion involving the pancreas, liver, gastric wall, adrenal glands, kidney as well as lymph nodes in areas adjacent to the gastrointestinal tract. 