Items tagged “hydatid disease”

Retroperitoneal hydatid infection refers to the presence of hydatid cyst in the retroperitoneal region of the abdomen. For a general discussion, and for links to other system specific manifestations, please refer to the article on hydatid disease.  Pathology It is generally seen secondary to ...

The ball of wool sign, also referred to as the yarn sign or congealed water lily sign, is an ultrasound appearance, representing degeneration of hydatid cysts (WHO class CE 4). The inner side of the cyst detaches from the cyst wall and folds on itself, causing a change from anechoic (fluid) to a...