Hydatid cyst of thoracic soft tissues

: Hydatid cysts are uncommon in thoracic soft tissue. We report a case of hydatid cyst which had developed within the lattissimus dorsi presenting as a left parietal scapular mass diagnosed by ultrasound and CT scan, which remains the preferred primary examination for the investigation of masses of this type. We discuss the various possible clinical and paraclinical contexts and recommend total pericystectomy of a closed cyst as the best treatment for this kind of cyst.