You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 40 year old male presents with a painless cystic liver enlargement of four years duration without fever or jaundice. The most likely diagnosis is and explain in detail?
Clinical features of hydatid disease Equally common in males and females, age 45 years Most(75%) are singular, located in right liver Mostly asymptomatic until complications occur Most common presenting symptoms - abdominal pain, dyspepsia and vomiting Most common sign- Hepatomegaly Ref:Sabiston 20th edition Pgno :1452