Endoscopic Tumour Biopsy

An endoscopic tumour biopsy takes small tissue samples from a suspected tumour using a flexible camera passed through a natural opening: the mouth for the oesophagus, stomach, duodenum, bile ducts, pancreas and airways, or the anus for the colon and rectum. Instruments passed through the endoscope collect the samples.

The biopsy provides the tissue diagnosis on which all cancer treatment depends: whether the lesion is cancer, of what type, and with what molecular features. A negative biopsy does not always exclude cancer, since a small sample can miss the abnormal area, and repeat sampling is sometimes needed.

What Endoscopic Tumour Biopsy shows

The pathologist examines the samples under a microscope to tell benign from malignant tissue, identify the tumour type, such as adenocarcinoma, squamous carcinoma, lymphoma, neuroendocrine tumour or GIST, and grade how abnormal the cells look. Special stains and molecular tests on the same tissue can show features that guide therapy, for example HER2 and PD-L1 in stomach cancer, mismatch repair status in bowel cancer, or EGFR and ALK in lung cancer. With endoscopic ultrasound, a needle can be passed through the gut wall to sample the pancreas, lymph nodes or lumps beneath the lining. The endoscopy also records the tumour's exact position and size and whether it narrows the passage.

When Endoscopic Tumour Biopsy is recommended

• An abnormal area, ulcer or mass seen at gastroscopy, colonoscopy or bronchoscopy
• A mass in the pancreas, bile duct or chest lymph nodes on CT, sampled by endoscopic ultrasound or EBUS
• Symptoms such as difficulty swallowing, persistent vomiting, bleeding or a change in bowel habit with a suspicious lesion
• Stomach ulcers, which are biopsied routinely to exclude cancer
• Surveillance of Barrett's oesophagus or inflammatory bowel disease
• Re-biopsy of a known cancer to test for new treatment targets

Limits and situations where another test is better:

• Tumours outside the reach of an endoscope, such as those in the liver, kidney or bone, which need an image-guided needle biopsy through the skin
• Lumps under the lining that ordinary forceps cannot reach, unless endoscopic ultrasound is used
• People on blood thinners that have not been adjusted, or with an uncorrected clotting problem
• A sample that is too small for molecular testing, which may call for a second procedure

How to prepare

• Fast for 6 to 8 hours for upper endoscopy; complete the full bowel preparation for colonoscopy
• Tell the team about blood thinners and antiplatelet drugs well in advance, as some need to be paused
• Bring your scan reports and images so that the endoscopist knows the target
• Arrange for someone to accompany you afterwards if you are having sedation
• Mention allergies, heart and lung conditions, loose teeth and any possibility of pregnancy

What happens during the test

Most procedures take 15 to 45 minutes; endoscopic ultrasound and ERCP can take up to an hour. You receive throat spray and intravenous sedation or a brief deep sedation given by an anaesthetist, so most people remember little. Taking the biopsy itself is not felt, because the gut lining has no pain nerves for pinching. Several samples, often 6 or more, are taken. You rest in recovery for 1 to 2 hours.

Results and next steps

The endoscopist can describe what was seen straight away, but the diagnosis comes from pathology, typically in 3 to 7 working days. Immunohistochemistry and molecular tests can add 1 to 2 weeks. The results are then discussed together with your scans to stage the disease and plan treatment. Ask for the full pathology report and find out where the tissue blocks are stored, because another hospital may need them.

• Test time: 15 to 60 minutes
• Results ready: 3 to 7 working days; longer for molecular tests
• Back to everyday activity: Rest of the day after sedation

Safety and risks

• Bleeding from the biopsy site, usually minor and self-limiting
• Perforation, which is rare
• Pancreatitis after pancreatic sampling or ERCP, in a few percent
• Sedation-related breathing or heart problems, mainly in frail people
• Sore throat or bloating for a day
• A non-diagnostic sample that requires repeat biopsy

Arranging Endoscopic Tumour Biopsy in Türkiye

A biopsy is a short procedure, but it is only the first step. It makes sense to have it abroad if you are also being assessed or treated there, or if you need a technique such as endoscopic ultrasound that is hard to access at home. Allow about a week for results if you want them discussed in person, or arrange a video consultation. If treatment will happen at home, make sure that the slides or tissue blocks and an English report travel with you.

Send your previous reports and the question you want answered and a Clinic-Y coordinator replies within 24 hours with suitable teams and written, all-inclusive proposals side by side. Reviewing your case is free.

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