Skip to main contentLast updated: 05-Nov-2026
Dr Harsh Shah
MS, MCh (Surgical Gastroenterology), DrNB (Surgical Gastroenterology)
Registered with Gujarat Medical Council, Reg. No. G-38738
Intestine Cancer Surgeon
Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad · 18 years of experience
In short
Cancer of the small bowel is found late because its signs are vague. They come and go, and they look like gas, acidity or a sluggish gut.
Iron-poor blood with a normal gastroscopy and colonoscopy points to the small bowel. A first blockage of the gut with no earlier operation also deserves a hard look.
Many people find out only when the bowel blocks, bleeds or tears. Asking the right question early can change the way the problem is found.
For the full picture of how these tumours are treated, read our small bowel cancer treatment page. This post is about the signs that bring people in, and why they are missed.
The small bowel is long, wide and out of reach of routine scopes. A tumour can grow for a long time before it blocks anything.
Because this cancer is rare, many doctors do not think of it first. The test that would find it is often not ordered. We keep it in mind when the story does not fit.
Pain, weight loss, vomiting, slow blood loss and a lump are the usual signs. Any one of them can be mild, and they often come and go.
| What you notice | What may be happening | How it often shows |
|---|---|---|
| Colicky pain around the navel | The passage is narrowing, and the bowel squeezes against it | Comes in waves, eases after passing gas |
| Weight loss | Poor appetite, poor absorption, the body using more energy | Often large by the time of diagnosis |
| Nausea and vomiting | A tighter blockage higher up | Worse after meals |
| Tiredness and pale skin | Slow, hidden blood loss from the tumour surface | Low iron, with stools that look normal |
| Black, tarry stool | Blood that has travelled through the gut | Sudden, and needs a doctor the same day |
| Yellow eyes and dark urine | A tumour near the bile duct opening | Pale stool, itching, usually no pain |
| A lump in the belly | A bulky growth, or bowel folded into itself | A late sign |
Do not wait for all of these. A new or changing pattern in someone who was told it was “just IBS” is the cue to ask again.
If your blood is low in iron and both a gastroscopy and a colonoscopy are normal, the small bowel is the next place to look.
The next step is usually a special scan of the small bowel or a capsule camera. Read about tumours of the duodenum and ampulla to see what reaches a scope and what does not.
Yes. A tumour in the first part, the duodenum, behaves differently from one in the long coiled part further down.
| Part | Usual story | Why it is found earlier or later |
|---|---|---|
| Duodenum and ampulla | Vomiting, early fullness, yellow eyes, black stool | Within reach of a scope, so often found sooner |
| Jejunum and ileum | Low iron for months, colic, a lump | Out of reach of routine scopes, so found later and larger |
| Last part of the ileum | Pain low on the right side | Looks like Crohn disease or gut tuberculosis, so a biopsy decides |
In India, tuberculosis of the gut can look exactly like a tumour. We think of both, and the biopsy tells them apart.
Yes. The type of cell shapes the story, which is why the biopsy matters as much as the scan.
| Type | What you may notice |
|---|---|
| Adenocarcinoma | Colicky blockage, slow bleeding and weight loss |
| Neuroendocrine tumour | Years of vague pain, later flushing and loose stools once it reaches the liver |
| Lymphoma | Fever, night sweats and weight loss; a tear in the bowel wall |
| GIST | Hidden or visible bleeding; a big mass with mild symptoms |
A GIST grows outward, so it can be large and still cause little blockage. Bleeding is what usually brings it to light. See our page on GIST treatment for what comes next.
A good number of people first come with a blockage, a tear in the bowel, a heavy bleed or a bowel folded into itself. The cancer is found behind the emergency.
When a tumour is suspected, the folded bowel is removed in one piece, without pushing it back. This avoids spreading cells and gives a proper specimen. We also send tissue for a tuberculosis test.
Write down how the pain behaves, bring every report and ask for a small bowel scan if scopes were normal.
Read about how small bowel cancer is treated if a tumour has already been found.
A gastroscopy and a colonoscopy reach only the two ends of the gut. Most of the small bowel lies between them. If your blood is low in iron and both scopes are normal, we look at the small bowel with a special scan or a capsule camera.
Usually not. Most such pain is from gas, adhesions or a sensitive gut. A new or changing pattern, with weight loss or low blood, is the signal to look further.
You swallow a small camera in a capsule and it takes pictures as it passes through. We first check that the bowel is not narrowed. A capsule can get stuck above a narrowing, so a scan comes first.
Yes, when the tumour sits near the opening of the bile duct in the duodenum. The eyes and skin turn yellow, the urine is dark and the stool is pale. It usually does not hurt.
Yes. In India, gut tuberculosis can look the same as a tumour on a scan. A biopsy and tests for tuberculosis tell them apart, and they are often done together.
Some slow-growing tumours release hormones once they spread to the liver. This gives sudden flushing of the face and watery stools. It points to spread beyond the bowel, so it needs a full workup.
Go to a hospital the same day for vomiting that will not stop, black tarry stool, a hard swollen belly or severe pain that does not ease. These can mean a blockage, a bleed or a tear in the bowel.
For the full range of small bowel tumour care, start at the small bowel cancer treatment page. For questions before you travel, call +91-63555-64601.
Dr Harsh Shah — Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad
Dr. Jivraj Mehta Hospital, Dr Jivraj Mehta Marg, Vasna, Ahmedabad 380007.
Consultations, review of reports and scans, operations and follow-up. OPD Monday to Saturday, 9 am to 5 pm.
Appointments: +91-63555-64601 · +91-63590-11009 · Hospital 079-2663 6363
Directions to the hospital · WhatsApp +91-63555-64601
Have you had months of vague belly pain, bloating or tiredness, and no clear answer? A low blood count with normal scopes is a reason to look further, not to wait. Dr Harsh Shah will listen to the whole story, choose the right test for the right part of the bowel, and explain what the result means. Call, or send a message on WhatsApp. Call +91-63555-64601 Ask on WhatsApp
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