Skip to main contentLast updated: 11-Nov-2026
Tapping Book on WhatsApp will likely open the WhatsApp app on your phone.
Dr Harsh Shah
MS, MCh (Surgical Gastroenterology), DrNB (Surgical Gastroenterology)
Registered with Gujarat Medical Council, Reg. No. G-38738
Pancreas Cancer Surgeon
Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad · 18 years of experience
In short
Every pancreatic cyst belongs to one of four groups: mucus-making, serous, inflammatory, or a solid tumour with a cystic part. The group decides whether you watch, operate or do nothing.
Mucus-making cysts (IPMN and MCN) can turn into cancer and are watched or removed. A serous cyst is almost always harmless and can usually be left alone.
The type is found by putting together the MRI, the EUS scan and, when needed, the cyst fluid. A lump in the wall of the cyst always raises concern.
This post explains how cysts are sorted. For tests, watching and surgery, see our pancreatic cystic lesions page.
The treatment follows the type. A harmless cyst should not be operated on, and a cyst that can turn into cancer should not be ignored.
More cysts are found today because CT and MRI scans are done for other reasons. Most are found by chance. The real task is not the operation, which is a standard one. The task is deciding which cyst needs it.
Two mistakes are possible. A large operation can be done on a harmless cyst that would never have caused trouble. Or a risky cyst can be watched until it becomes a cancer that cannot be removed. Sorting the cyst correctly at the first visit avoids both.
Doctors sort cysts into four groups. Two cuts do most of the work: neoplastic or not, and then mucus-making or serous.
| Group | Examples | Can it turn into cancer? | Usual plan |
|---|---|---|---|
| Mucus-making | IPMN, MCN | Yes, it varies by type | Watch with scans, or remove |
| Serous | Serous cystadenoma | Almost never | Leave alone unless it causes symptoms |
| Inflammatory | Pseudocyst, walled-off collection | No, it only mimics a tumour | Treat the pancreatitis; drain if it troubles you |
| Solid tumour with a cystic part | SPN, cystic neuroendocrine tumour, cancer with cystic change | Low to high | Most are removed |
Your report may use only the words “cystic lesion”. The first job at the clinic is to place it in one of these groups.
The mucus-making cysts. IPMN is linked to the pancreatic duct. MCN is a separate cyst that is seen almost only in women.
IPMN is the cyst found by chance most often. It joins the duct system of the pancreas. It has three forms, and the form changes the risk.
MCN is seen in women, usually in middle age, in the body or tail of the pancreas. It does not join the duct. Because it can turn into cancer and is hard to watch reliably, the threshold for removal is lower. It is often confused with a branch-duct IPMN on a scan.
Because these cysts can change, we handle them with the same care as a cancer. Our post on who needs pancreatic cancer screening explains the watching side.
A serous cystadenoma. It looks like a cluster of tiny cysts, often with a scar at the centre, and it almost never turns into cancer.
On a scan it looks like a honeycomb or a bunch of grapes. The fluid is thin and watery. Most people need no treatment. We advise an operation only if it causes symptoms by pressing on nearby organs, if it grows fast, or if the doubt about its type cannot be settled.
Be careful with one variant. A serous cyst made of a few larger cysts loses the honeycomb look and can pass for a mucus-making cyst. A fluid test usually settles this.
Yes. A pseudocyst is a fluid collection after pancreatitis and is not a tumour. But a mucus-making cyst can itself cause an attack of pancreatitis.
A pseudocyst has a wall of scar tissue, no true lining, and fluid rich in pancreatic enzymes. It follows a clear attack of pancreatitis or an injury. If there was no clear cause, a cystic lesion is treated as a tumour until shown otherwise. Such a cyst should have an EUS scan and fluid test before anyone drains it.
Three solid tumours can look like cysts: SPN, cystic neuroendocrine tumour and cancer with cystic change. Any solid part that takes up contrast moves a cyst to the high-concern group.
Three things are put together: the shape on MRI and CT, the picture from EUS, and the cyst fluid. Your age, sex and history add to the picture.
| Test | What it answers |
|---|---|
| MRI with MRCP | Does the cyst join the duct? How wide is the main duct? Is there a nodule? There is no radiation |
| CT scan | Calcium pattern and any solid part. A rim of calcium points to MCN, a central scar to a serous cyst |
| EUS (scope scan) | A close look at the wall, septa and nodules, and a way to take fluid with a thin needle |
| Cyst fluid CEA | High means mucus-making. It does not tell us whether the cyst is cancer |
| Cyst fluid amylase | Very high in a pseudocyst, and high when the cyst joins the duct |
| Gene tests on fluid (KRAS, GNAS) | A GNAS change points to IPMN. These tests are not yet routine in India |
The usual clues also help. A cyst joined to a widened duct in an older person is most likely IPMN. A cyst in the tail of a woman in her forties, not joined to the duct, suggests MCN. A large mixed lump in a woman in her twenties is SPN until shown otherwise. No test is perfect, and some cysts stay uncertain until they are removed.
Newer evidence on follow-up is covered in what is new in pancreatic cancer care.
Ask which of the four groups your cyst belongs to, how sure we are, and what would change the plan. Bring every scan on a disc.
There are four groups: mucus-making cysts (IPMN and MCN), serous cysts, inflammatory cysts such as a pseudocyst, and solid tumours that have a cystic part. The group decides the plan.
The mucus-making ones, IPMN and MCN. A serous cyst almost never does, and a pseudocyst is not a tumour. Solid tumours with a cystic part need their own assessment.
Not usually. Many are small side-branch cysts or serous cysts, which are watched or left alone. An operation is considered for a widened main duct, a nodule in the wall, symptoms or fast growth.
Yes, in both directions. A mucus-making cyst can cause pancreatitis, and a true pseudocyst can look like a tumour. A history of pancreatitis and a fluid test help to tell them apart.
It shows whether the cyst joins the pancreatic duct and how wide the duct is, without radiation. These two points decide how a cyst is classified.
It is a marker measured in fluid taken at EUS. A high value points to a mucus-making cyst. It does not show whether the cyst has become cancer.
Almost never. It is treated only if it causes symptoms by pressing on nearby organs, grows quickly, or cannot be told apart from a mucus-making cyst.
A solid pseudopapillary neoplasm (SPN) is seen mostly in young women as a large mixed solid and cystic lump. It is low-grade and is usually removed.
For tests, watching and surgery for a cyst, start at the pancreatic cystic lesions 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
Has a scan report told you there is a cyst in the pancreas, and nobody has said what kind it is? Dr Harsh Shah looks at the MRI, CT and EUS pictures, works out which type of cyst it is, and explains whether it needs watching, an operation, or nothing at all. Bring every scan and report. You can also call, or message us on WhatsApp. Call For Appointment Book on WhatsApp Tapping Book on WhatsApp will likely open the WhatsApp app on your phone.
Tapping Book on WhatsApp will likely open the WhatsApp app on your phone.
Swasth Parivar: every week, practical advice on recovery, diet and warning signs. No advertising. Stop any time.
Your number is used for these updates and for the clinic to reach you. It is never sold or passed on. To stop, reply STOP on WhatsApp.
