Endoscopic fine needle aspiration: what to know

An endoscope is a flexible tube with a camera. During an endoscopic ultrasound procedure, it can pass through the mouth or another natural opening to view structures beside the digestive tract. Ultrasound helps the clinician guide a fine needle through the endoscope toward a lump, lymph node or fluid collection. The sample is then examined by a laboratory team.

The test may help investigate a pancreatic, stomach, oesophageal or nearby abnormality, depending on the clinical question. It can support diagnosis and treatment planning, but the result is interpreted with scans, examination and your symptoms.

Follow the unit’s instructions about fasting and medicines. Tell the team about blood thinners, allergies, pregnancy, sleep apnoea and previous reactions to sedation or anaesthesia. Arrange transport if sedation is used, and do not plan to drive until the team says it is safe.

A sore throat, bloating or sleepiness can occur after the procedure. The clinician will explain when the laboratory result is expected and whether another sample or test may be needed if the cells collected do not answer the question.

Seek urgent help after the procedure for severe or worsening abdominal or chest pain, vomiting blood, black stools, fever with shaking chills, fainting, breathing difficulty, or trouble swallowing that is getting worse. Contact the endoscopy unit for persistent vomiting, increasing pain or any concern about the wound or sample site.

Ask: What area will you sample? Will I receive sedation? Which medicines should I pause? What complications should I watch for? When will results be available, and what happens if the sample is inconclusive?