B67.9

Clinical Causes: Infection occurs through contact with contaminated animals, especially dogs, which are natural hosts for Echinococcus tapeworms. Consumption of food or water contaminated with tapeworm eggs. Accidental ingestion of eggs shed in the feces of infected animals.

Key Symptoms: Abdominal pain or discomfort, especially in the upper right abdomen. Swelling or palpable mass in the affected area. Nausea or vomiting. Fever, if secondary infection occurs. Symptoms related to cyst rupture or infection include allergic reactions or chest pain when lungs are involved. No symptoms in early stages; cysts may be discovered incidentally during imaging.

Diagnosis Path: Diagnosing echinococcosis typically involves imaging tests such as ultrasound, CT scans, or MRI to visualize cysts within organs. Blood tests may also be conducted to detect specific antibodies against the parasite. In some cases, fine-needle aspiration or biopsy might be performed, although this is approached with caution due to the risk of cyst rupture. A comprehensive medical history, including exposure to potentially infected animals, aids in diagnosis.

Treatment Protocols: Surgical intervention to remove cysts, especially if they cause symptoms or grow large enough to threaten organ function. Antiparasitic medications such as albendazole or mebendazole to reduce cyst size or eliminate residual infection. Percutaneous aspiration, injection, and re-aspiration (PAIR) technique for certain cyst types, often combined with medication. Regular follow-up with imaging studies to monitor for recurrence or new cyst formation.