Splenic Hydatid Fig. USG showing the characteristic appearance of a large cystic mass with multiple daughter cysts within The CT scans show a large cystic lesion in the spleen. This appearance is characteristic of a hydatid cyst. Two-thirds of splenic cysts are hydatid cysts. Ultrasound tends to show the daughter cysts and central matrix, better than CT, though both are usually diagnostic.
Calcification often occurs.
Ruptures are known and may be contained within the organ or the cysts may rupture into the peritoneal cavity. On MR, the daughter cysts are slightly lower in signal than the main cyst, on T1W images. Computed Body Tomography with MRI Correlation. Lee JKT, Sagel S, eds.