Skip to main contentLast updated: 07-Nov-2026
Dr Harsh Shah
MS, MCh (Surgical Gastroenterology), DrNB (Surgical Gastroenterology)
Registered with Gujarat Medical Council, Reg. No. G-38738
Liver & Gastro Surgeon
Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad · 18 years of experience
In short
A liver hydatid cyst is a fluid-filled bag formed by a tiny dog tapeworm. People swallow its eggs through food, water or hands that carry traces of dog stool.
Many cysts give no symptoms for years and are found by chance on a scan. When they do, the usual signs are a dull ache or fullness in the upper right belly.
Sudden itching, hives, a breathless spell, yellow eyes or fever with pain need a doctor the same day.
What a hydatid cyst is, how it differs from a liver abscess, and how it is treated are covered on our liver abscess and hydatid cyst page. This post answers two plain questions: how did I get it, and what will I feel?
The parasite is Echinococcus granulosus. A dog carries the adult worm in its gut, and passes the eggs in stool. A person is infected by swallowing those eggs.
Sheep, goats and cattle swallow the eggs while grazing and develop cysts in their own livers. A dog that eats raw organs from such an animal picks up the worm, and the cycle goes on. People sit at the side of this cycle by accident. The disease does not pass from one person to another, and you cannot catch it by sitting near someone who has a cyst.
The eggs hatch in the gut, the tiny larvae cross the gut wall into the blood, and most settle in the liver. There each one grows into a slow, thin-walled cyst.
The liver is the first filter for blood leaving the gut, so it catches most larvae. Some pass on to the lungs, and a few reach other organs. A cyst grows slowly, often over many years, so a person may have been infected long before the first symptom. That is why many people cannot recall any exposure.
Most small cysts cause nothing at all. A growing cyst presses on its neighbours, and the symptoms depend on where it sits and how big it is.
| What you notice | What may be happening | How soon to be seen |
|---|---|---|
| No symptoms, cyst found on a scan | A small or quiet cyst | Book a visit and bring the report |
| Dull ache or fullness in the upper right belly | The cyst is stretching the liver covering | Within days to weeks |
| A lump under the right ribs, early fullness, nausea | A large cyst pressing on the stomach or bowel | Within days to weeks |
| Yellow eyes, dark urine, itching | The cyst presses on, or has opened into, a bile duct | Same day |
| Fever, chills, a tender liver | The cyst has become infected | Same day |
| Sudden hives, wheeze, breathlessness, faintness | The cyst has leaked, and the body is reacting to the fluid | Emergency |
| Cough or chest pain on the right | A cyst pressing up on the lung, or reaching the chest | Within days |
None of these signs proves a hydatid cyst, because gallstones, hepatitis and other liver conditions cause some of them too. A scan settles the question.
An ultrasound usually shows the cyst, and a CT or MRI scan shows its layers, any smaller cysts inside it, and its link to the bile ducts. A blood test can support the finding.
Yes, in most households. Washing hands, washing vegetables well and drinking safe water cut the risk, and so does worming the dogs that live near you.
Do not press on the area, do not let anyone puncture it, and bring the scan to a liver surgeon. Treatment depends on the cyst, and many need only tablets and follow-up.
Your surgeon looks at the size, the number of cysts, the position, and whether a cyst touches a bile duct. From that comes the plan: tablets and scans, a needle procedure, keyhole surgery or open surgery. Our post on what happens in hydatid cyst surgery walks through the operation. The role of tablets is in albendazole before and after hydatid surgery.
Ask what kind of cyst it is, whether it is alive, and what could make it burst.
No. It does not pass between people. The eggs come from dog stool, so the risk is contact with dogs, or with food and water that dog stool has reached.
Often many years. The cyst grows slowly, and a person may feel nothing until it is large or presses on a duct or organ. Many are found by chance on a scan done for another reason.
No. A small cyst may give no pain at all. A larger one can cause a dull ache or a feeling of fullness in the upper right belly.
Sudden itching, hives, wheeze, breathlessness or faintness, sometimes with sharp pain. This is an emergency, so go to a hospital at once.
Yes, if vegetables were grown where dog stool lies and are eaten raw or only rinsed. Washing them well in running water, or cooking them, lowers the risk.
If you have a dog and a cyst has been found, ask a vet about worming the dog on a schedule. Do not feed it raw organs from sheep, goat or cattle.
No. A hydatid cyst is a parasite cyst filled with clear fluid. An abscess is a pocket of pus from bacteria or amoeba. The treatment differs, which is why a scan matters.
For the full picture of liver abscess and hydatid cyst, start at the liver abscess and hydatid cyst 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
Found a cyst in your liver on a scan, or living with an ache under the right ribs that no one has explained? Dr Harsh Shah looks at your reports, tells you whether a hydatid cyst is likely, and sets out what to do next. Book a visit and bring every scan and blood report. You can also call, or message us on WhatsApp. Call +91-63555-64601 Ask on WhatsApp
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