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Hydatid Cyst (Comprehensive)

Echinococcus granulosus, hepatic and pulmonary cysts, WHO classification, PAIR procedure, albendazole

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Internal Medicine department. Book Appointment →

What is Hydatid Cyst (Comprehensive)?

Echinococcus granulosus is a small tapeworm whose adult stage parasitizes dogs and other canids. Eggs shed in feces are ingested by intermediate hosts (sheep, cattle, humans), where larvae penetrate intestinal wall, enter portal circulation, and form fluid-filled cysts in liver (70 percent), lungs (20 percent), and rarely brain, bone, kidney, or heart. Endemic regions include the Mediterranean, Middle East, Central Asia, and South America.

Hepatic cysts may grow asymptomatically for years until reaching 10 cm or causing pain, jaundice from biliary compression, or rupture into peritoneum, biliary tree, or pleura with potentially fatal anaphylaxis. Pulmonary cysts present with cough, hemoptysis, or chest pain. World Health Organization ultrasound classification (CE1 to CE5) guides treatment.

Diagnosis combines imaging (ultrasound, computed tomography, magnetic resonance) with serology (ELISA, immunoblot). Active cysts (CE1, CE2, CE3a) require treatment: surgery (open or laparoscopic), percutaneous puncture-aspiration-injection-reaspiration (PAIR) with hypertonic saline or ethanol, or albendazole alone for small cysts. Inactive cysts (CE4, CE5) are watched. Albendazole 400 mg twice daily perioperatively reduces recurrence.

Symptoms

Right upper quadrant pain or mass
Cough, hemoptysis with pulmonary cyst
Allergic reaction or anaphylaxis (rupture)
Jaundice from biliary obstruction
Eosinophilia and positive serology

Risk Factors

Sheep and cattle farming areas
Dog ownership in endemic regions
Mediterranean and Middle East origin
Contaminated vegetable consumption
Children with close dog contact

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • For abdominal mass or chronic pain
  • For positive hydatid serology
  • For incidental cyst on imaging
  • For pulmonary cyst with cough
  • Before any cyst aspiration procedure

Treatment Methods

01
WHO ultrasound classification staging
02
Albendazole 400 mg twice daily
03
PAIR for selected uniloculated cysts
04
Surgery for large or complicated cysts
05
Avoid spillage during intervention
06
Long-term imaging follow-up for recurrence

Which Department to Visit?

You can visit our Enfeksiyon Hastalıkları department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Enfeksiyon Hastalıkları Department

Let us help you

You can make an appointment with our specialists or contact us for your concerns.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.