What is it?
During EUS, a thin needle is passed through the scope channel into a target lesion under real-time ultrasound guidance.
Both cytology (cell smears) and histology (tissue cores) can be obtained in the same sitting.
FNAB
EUS-guided Fine Needle Aspiration and Biopsy
FNAB combines endoscopic ultrasound with a thin needle to sample lesions in the pancreas, lymph nodes, and other deep structures next to the gut wall.
Who needs it?
- Pancreatic mass requiring tissue diagnosis.
- Enlarged lymph nodes in the chest or abdomen.
- Submucosal lesions of the gut wall.
How it works
Performed during EUS, under sedation. The needle is advanced into the target and tissue is sampled.
Preparation
- Same as EUS. Blood thinners are stopped in advance.
Recovery
- Same as EUS. Same-day discharge.
Risks
Bleeding and infection are uncommon. Specific risks depend on the target organ.
Common questions
Things patients ask us.
How accurate is the result?
When tissue is obtained, accuracy is high. In a small proportion of cases the result is non-diagnostic and the test may need to be repeated.
Related procedures
EUS
Advanced imaging for pancreas, bile duct, and deep lesions.
ERCP
Treatment for bile duct stones and obstructions.
Spyglass Cholangioscopy
Direct visualisation inside the bile duct.
Conditions we treat with this