Summary: | <p>Abstract</p> <p>Introduction</p> <p>Hydatid disease is a parasitic infestation caused by <it>Echinococcus granulosus</it>. The resulting large cysts in the lung are a special clinical entity called giant hydatid cysts.</p> <p>Case presentation</p> <p>An 18-year-old Yemeni woman presented with a dry cough and mild fever, with no history of chest pain, dyspnoea or weight loss. Chest X-ray revealed a homogenous opacity almost replacing the right lung. The patient underwent surgery which revealed a large, viable hydatid cyst measuring 26 × 18 × 5 cm.</p> <p>Conclusion</p> <p>This case report provides evidence that non-complicated hydatid cysts, even if very large, have a good prognosis and can be safely treated by parenchyma-preserving surgery.</p>
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