Although cystic lung lesions appear benign on radiological examination; it is known that they interfere with some lung and pleural tumors. Especially in countries like our country where the cyst hydatid disease is endemic and so, they can be confused with lung tumors, as seen in our cases. The radiological lesions which have well-circumscribed are known to may not be a part of cyst hydatid. Surgical operation appears to be a good option for both treatment and definitive diagnosis in suspected cases. In our study, we presented two cases who we can’t distinguish between tumor and cyst with the conventional methods and we decided to perform exploration.
Keywords: Cyst, Tumor, Dilemma