Lesson of the month 2: Cough and right hypochondrial discomfort.

Cystic echinococcosis, commonly known as hydatid disease, is caused by the larval stage of the tapeworm Echinococcus granulosus. Humans are an accidental host to this rare disease in the UK, with around 10-20 new cases reported each year. Once suspected, the diagnosis is confirmed through a combination of relevant history, imaging studies and serological testing.