Description

Abstract: Cystic echinococcosis is extremely rare in the United States. Because some
symptoms of a pulmonary hydatid cyst can closely resemble those of common pneumonia,
it emphasizes the importance of thorough assessment of a patient’s travel history. Cystic
echinococcosis is caused by the consumption of the eggs of the parasitic worm, Echinococcus
granulosus, which can lead to hydatid cysts forming in various organs, including the lungs
and liver. Our patient initially received treatment for bacterial pneumonia due to his
symptoms of chest pain, coughing and shortness of breath. However, when symptoms
persisted despite receiving treatment, a CT scan revealed a mass in his right lung. Lab
cultures from collected fluid samples confirmed the presence of Echinococcus granulosus.
The patient’s final diagnosis was atypical pneumonia secondary to hydatid cyst, taking into
consideration his recent move from Afghanistan, where cystic echinococcosis is more
prevalent. Treatment included aspiration of the cyst, a lobectomy, and the administration of
the anti-parasitic medication albendazole. This case illustrates the importance of diagnostic
imaging when thoroughly evaluating atypical pneumonia cases and the role the patient’s
travel history may have in a successful diagnosis.

Keywords: Atypical Pneumonia; Echinococcus granulosus; Pulmonary Hydatid Cyst