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PubMed This is a summary of 18 peer-reviewed journal articles Updated
Infectious Disease

Symptoms & Complications: What to Watch For

At a Glance

Cystic echinococcosis cysts often grow silently for years without causing issues. When symptoms do appear, they typically affect the liver (abdominal pain, jaundice) or lungs (cough, chest pain). A ruptured cyst is a medical emergency that can cause life-threatening anaphylactic shock.

For many people, Cystic Echinococcosis (CE) is a “silent” passenger. Because the cysts grow so slowly, the body often adapts to their presence for years without any outward signs of illness [1][2]. Most people only discover they have the condition when they receive an ultrasound or CT scan for an unrelated reason, such as checking for gallstones or during a routine physical [2][3].

However, as a cyst grows or if it begins to interfere with organ function, symptoms can emerge. These symptoms depend almost entirely on where the cyst is located.

Symptoms by Location

While the parasite can technically settle anywhere, the vast majority of cysts are found in two organs:

  • The Liver (Over 70% of cases):
    • Common symptoms: A dull ache or “fullness” in the upper right side of the abdomen, nausea, or bloating [4].
    • Overlooked signs: If a cyst presses on or leaks into the bile ducts (cystobiliary communication), it can cause jaundice (yellowing of the skin and eyes), dark urine, or fever that mimics a gallbladder attack [4][5].
  • The Lungs (About 20% of cases):
    • Common symptoms: A persistent dry cough, chest pain, or shortness of breath [6].
    • Overlooked signs: Some patients may cough up a salty-tasting fluid or bits of the cyst wall (which may look like grape skins), a sign that the cyst has ruptured into a bronchial tube [6][7].
  • Other Organs (Less than 10% of cases):
    • While rare, cysts can occasionally form in other areas, such as the spleen, kidneys, bones, or brain [4][8]. Symptoms in these areas are highly specific to the organ involved (e.g., bone pain or neurological changes).

The Risk of Rupture and Anaphylaxis

One of the most important things for a patient to understand is the risk of cyst rupture. A rupture can happen spontaneously due to high pressure inside the cyst, or because of a blow to the chest or abdomen (such as a car accident or a fall) [9][10].

Lifestyle Guidance: Because of this risk, if you have an active, untreated cyst, you should avoid contact sports, heavy lifting, or activities with a high risk of falls or impact [9]. Ask your doctor for specific guidelines on what physical activities to restrict until the cyst is treated or fully calcified.

When a cyst ruptures, the fluid inside—which contains parasite proteins—is released into the body. This can trigger anaphylactic shock, a severe and life-threatening allergic reaction [9][11].

Warning signs of rupture and anaphylaxis include:

  • Sudden, sharp, or “tearing” pain in the abdomen or chest [12][10].
  • Severe itching or the sudden appearance of urticaria (hives) [13].
  • Swelling of the lips, tongue, or throat [11].
  • Difficulty breathing or wheezing [6].
  • A rapid drop in blood pressure, which may feel like sudden dizziness or fainting [9].

If you suspect a cyst has ruptured, this is a medical emergency that requires immediate care.

Other Complications

Beyond rupture, other complications can occur as the cyst matures:

  • Biliary Fistula: This is an abnormal opening between the cyst and the bile ducts in the liver [5]. It can lead to cholangitis (an infection of the bile ducts) which often causes high fevers and severe jaundice [14][15].
  • Superinfection: Occasionally, a “dead” or inactive cyst can become infected with bacteria, turning it into a liver abscess that causes persistent fever and pain [16][17].
  • Secondary Echinococcosis: If a cyst ruptures and “seeds” the rest of the abdominal or chest cavity, new cysts can begin to grow in those areas over time [9].

Because these complications can be serious, your medical team will monitor “active” fluid-filled cysts more closely than “inactive” calcified ones [18].

Back to Home Page

Common questions in this guide

What are the symptoms of a cystic echinococcosis cyst in the liver?
Most liver cysts grow slowly and may not cause problems for years. When symptoms do occur, they usually include a dull ache or feeling of fullness in the upper right abdomen, nausea, or bloating. If the cyst presses on a bile duct, you may also experience jaundice or dark urine.
How do I know if my cyst has ruptured?
A ruptured cyst can cause sudden, sharp, or tearing pain in your chest or abdomen. This is a medical emergency because the fluid inside the cyst can trigger a severe, life-threatening allergic reaction called anaphylactic shock. Signs include hives, swelling, and difficulty breathing.
Should I restrict my physical activity if I have an active CE cyst?
Yes, if you have an active, untreated cyst, you should avoid activities that could cause the cyst to rupture. This includes contact sports, heavy lifting, or any activities with a high risk of falling. Your doctor can provide specific guidelines based on your cyst's location and size.
What should I do if I develop a sudden fever and jaundice?
Sudden fever and jaundice can be warning signs of cholangitis, which is a serious infection in your bile ducts caused by the cyst. If you develop these symptoms, you should seek immediate medical attention or contact the emergency care team designated by your doctor.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Is my cyst located near any major bile ducts or blood vessels that might increase the risk of complications?
  2. 2.What is the current size of my cyst, and at what size would you consider it 'high risk' for rupture?
  3. 3.Should I be carrying an epinephrine auto-injector (EpiPen) in case of an accidental rupture and anaphylaxis?
  4. 4.If I develop a sudden fever or jaundice, who is the first person on my care team I should contact?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (18)
  1. 1

    Echinococcal disease can present with giant abdominal cysts at very young age: A case report.

    Remmerswaal LD, Janes VA, Lamers AB, et al.

    Parasitology international 2024; (102()):102923 doi:10.1016/j.parint.2024.102923.

    PMID: 39002607
  2. 2

    Incidental Asymptomatic Giant Hydatid Cyst of the Interventricular Septum Bulging Into the Right Ventricle.

    Bougrine R, Aissaoui H, Elouafi N, Ismaili N

    Cureus 2021; (13(2)):e13532 doi:10.7759/cureus.13532.

    PMID: 33786239
  3. 3

    A case report of hydatid cyst in the right kidney of a 58-year-old woman.

    Setayeshfar M, Rahnama H, Rakhshan A, Abedi A

    Urology case reports 2024; (53()):102646 doi:10.1016/j.eucr.2023.102646.

    PMID: 38333762
  4. 4

    Liver hydatid cyst rupture into gallbladder and right hepatic duct: A case report.

    Fahmi MS, Farda W, Sharif Z, Jamal RS

    International journal of surgery case reports 2024; (123()):110305 doi:10.1016/j.ijscr.2024.110305.

    PMID: 39303486
  5. 5

    Management of liver hydatid cyst with cystobiliary communication and acute cholangitis: a 27-year experience.

    Toumi O, Ammar H, Gupta R, et al.

    European journal of trauma and emergency surgery : official publication of the European Trauma Society 2019; (45(6)):1115-1119 doi:10.1007/s00068-018-0995-7.

    PMID: 30191292
  6. 6

    Uncommon Presentation of a Pulmonary Hydatid Cyst: A Case Report.

    Maalej A, Al Janaahi A, Attia KE

    Cureus 2025; (17(2)):e79830 doi:10.7759/cureus.79830.

    PMID: 40041642
  7. 7

    Pulmonary hydatid cyst mimicking lung tumor in a heavy smoker patient- Uniportal VATS management.

    Essa RA, Ahmed SK, Mohamed MG

    International journal of surgery case reports 2022; (95()):107138 doi:10.1016/j.ijscr.2022.107138.

    PMID: 35576750
  8. 8

    Hydatid Cyst of the Thigh With Incidental Hepatitis B: A Rare Case.

    Usman R

    Cureus 2025; (17(11)):e96444 doi:10.7759/cureus.96444.

    PMID: 41216246
  9. 9

    Anaphylaxis triggered by a hidden threat: A rare hydatid disease case report.

    Changuel A, Omry A, Behi H, et al.

    International journal of surgery case reports 2024; (119()):109779 doi:10.1016/j.ijscr.2024.109779.

    PMID: 38781844
  10. 10

    Acute intraperitoneal rupture of hydatid cysts of the liver: Case series.

    Mejri A, Arfaoui K, Omry A, et al.

    Medicine 2021; (100(44)):e27552 doi:10.1097/MD.0000000000027552.

    PMID: 34871219
  11. 11

    Anaphylactic shock due to traumatic rupture of pulmonary hydatid cyst: Case report.

    Mohammed A, Malki K, Mellagui Y, et al.

    International journal of surgery case reports 2021; (81()):105660 doi:10.1016/j.ijscr.2021.105660.

    PMID: 33691273
  12. 12

    A Troublesome Complication of Hydatid Cysts; Intra-Abdominal Rupture: A 10-Year Study from a High-Volume Center.

    Yönder H, Berhuni MS, Elkan H, et al.

    Iranian journal of parasitology 2024; (19(1)):45-51 doi:10.18502/ijpa.v19i1.15199.

    PMID: 38654950
  13. 13

    Emergency/Elective Surgery and Emergency Percutaneous Interventions in Liver Hydatid Cysts and Their Results.

    Öter S, Yalçın M

    The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology 2023; (34(10)):1071-1077 doi:10.5152/tjg.2023.22818.

    PMID: 36919888
  14. 14

    [Liver hydatidosis causing obstructive cholangitis : a case report].

    Basbous S, Hayette MP, Léonard P, et al.

    Revue medicale de Liege 2021; (76(7-8)):575-578.

    PMID: 34357705
  15. 15

    "Intraperitoneal ruptured hydatid cyst of liver with cystobiliary communication: A case report".

    Shrestha S, Ghimire SK, Shrestha M, et al.

    International journal of surgery case reports 2025; (127()):111012 doi:10.1016/j.ijscr.2025.111012.

    PMID: 39899956
  16. 16

    A rare complication of the hydatid cyst of the liver: A case report of Cysto-cutaneous fistula.

    Mouelhi D, Senda BL, Jedidi L, et al.

    International journal of surgery case reports 2025; (136()):112046 doi:10.1016/j.ijscr.2025.112046.

    PMID: 41332062
  17. 17

    Superinfection of a Dead Hepatic Echinococcal Cyst with a Cutaneous Fistulization.

    Cicero G, Blandino A, Ascenti G, et al.

    Case reports in radiology 2017; (2017()):9393462 doi:10.1155/2017/9393462.

    PMID: 29181218
  18. 18

    The Echinococcoses: Diagnosis, Clinical Management and Burden of Disease.

    Kern P, Menezes da Silva A, Akhan O, et al.

    Advances in parasitology 2017; (96()):259-369 doi:10.1016/bs.apar.2016.09.006.

    PMID: 28212790

This page explains the symptoms and potential complications of cystic echinococcosis for educational purposes. It is not a substitute for professional medical advice, diagnosis, or emergency treatment.

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