Case 220: Echinococcosis, cystic (hydatid)
58 year old woman with abdominal pain. The patient reported travel history to Mexico and Jamaica.
CT: WHO type CE2, with daughter cysts
CT demonstrates a large hydatid cyst in segment 4, WHO classification type CE2. Note that the dominant cyst has mildly higher attenuation than the peripheral smaller daughter cysts due to debris and proteinaceous components. Higher attenuation of cyst contents corresponds to increased T1 signal on MR.