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Thoracic Wall Hydatid cysts in the thoracic wall and soft tissues are uncommon (less than 1%). They are usually secondary, spreading from cysts in the lungs or bones of the thoracic cage. Superinfection, abscess formation and fistulas may occur, but are not readily visualized in the early stages with conventional radiography alone. If there is strong clinical indication, CT or MRI will be helpful (Figs. 3.116 and 3.117).
Fig. 3.116 A 66-year-old Saudi man with recurrent hydatid cyst after thoracentesis. (A) Chest radiograph shows recurrent lateral mass contiguous with pleura secondary to previous thoracentesis and removal of huge hydatid cyst several years earlier. (B) MRI (1.5T, SE 850/20), axial view obtained at the same time as (A) reveals a cystic mass with subcutaneous extension (large arrows) containing multiple daughter cysts (small arrows). (Courtesy of Dr. von Sinner and Eur Radiol, 1993).
Fig. 3.117 CT scan showing a univesicular Type I hydatid cyst involving the thoracic wall musculature of a 28-year-old Tunisian woman. (Courtesy of Dr. Gharbi, Tunis).
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Copyright: Palmer and Reeder
