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Endoscopic Ultrasound (EUS) is a minimally invasive procedure that combines endoscopy with ultrasound technology. A specialized endoscope equipped with a tiny ultrasound probe is passed through the mouth or rectum to obtain detailed images of the digestive tract wall and surrounding organs, including the pancreas, bile ducts, liver, and lymph nodes.
Unlike conventional ultrasound performed on the skin surface, EUS positions the ultrasound probe directly next to the area of interest, producing remarkably detailed images. This proximity allows visualization of structures as small as a few millimeters and provides information that CT scans and MRIs cannot achieve. EUS is particularly valuable for evaluating pancreatic masses, bile duct abnormalities, and staging gastrointestinal cancers.
Dr. Jing Tong's training at Johns Hopkins School of Medicine and his therapeutic endoscopy license make him uniquely qualified to perform EUS and EUS-guided fine needle aspiration (FNA) or fine needle biopsy (FNB). These techniques allow him to obtain tissue samples from deep-seated lesions -- such as pancreatic masses or enlarged lymph nodes -- without the need for surgical biopsy, providing critical diagnostic information with minimal risk.
Evaluation and biopsy of pancreatic lesions
Precise staging of GI and pancreatic cancers
Assessment and aspiration of pancreatic cysts
Detection of stones missed by other imaging
Evaluation of masses beneath the GI lining
Sampling of enlarged or suspicious lymph nodes
Fasting for 6-8 hours is required. Dr. Tong reviews your imaging studies and medical history to plan the examination. Certain medications may need adjustment.
IV sedation ensures your comfort throughout the procedure. You will not feel pain and most patients have no recollection of the examination.
The echoendoscope is gently guided into position. Dr. Tong uses the ultrasound probe to create detailed cross-sectional images of the GI wall, pancreas, bile ducts, and surrounding structures.
If a suspicious lesion is identified, Dr. Tong performs EUS-guided FNA or FNB -- passing a thin needle through the endoscope and into the lesion under real-time ultrasound guidance to collect tissue samples.
After recovery, Dr. Tong discusses the ultrasound findings with you. If tissue samples were obtained, pathology results are typically available within 5-7 business days, after which Dr. Tong will review the complete diagnosis and treatment plan.
Advanced endoscopic training from a world-renowned medical institution, with specific expertise in EUS interpretation and EUS-guided tissue acquisition.
Licensed in therapeutic endoscopy, Dr. Tong can perform both diagnostic imaging and interventional procedures including FNA and drainage.
Complex findings explained clearly in English, Mandarin, and Shanghainese so you fully understand your diagnosis and options.
Easily accessible office on Roosevelt Avenue in Flushing, Queens, serving patients from across NYC, Long Island, and New Jersey.
EUS places the ultrasound probe inside the body, directly next to the area being examined. This provides much higher resolution images than external ultrasound, especially for the pancreas, bile ducts, and GI tract wall layers.
No. EUS is performed under sedation, so you will feel no pain. The procedure is similar in comfort to a standard upper endoscopy.
Fine Needle Aspiration (FNA) is a technique where Dr. Tong passes a thin needle through the endoscope into a mass or cyst under ultrasound guidance. This obtains tissue samples for pathological analysis without surgery.
EUS typically takes 20-45 minutes depending on whether tissue sampling is needed. Plan for about 2-3 hours total at our Flushing office including preparation and recovery.
EUS is considered the most sensitive imaging test for detecting small pancreatic tumors, often finding lesions missed by CT scans and MRIs. Combined with FNA, it provides both imaging and tissue diagnosis in a single session.
Contact Dr. Jing Tong's Flushing office for expert endoscopic ultrasound evaluation.
