Question 1757
{"accessible":true,"alternatives":[{"id":8725,"text":"CE1"},{"id":8726,"text":"CE2"},{"id":8727,"text":"CE3A"},{"id":8728,"text":"CE3B"},{"id":8729,"text":"CE4"}],"archived":false,"correctAlternativeId":8727,"explanation":"\u003cp\u003eThere is a large well-defined cystic lesion centered on the segments VII/VIII of the liver with a detached irregular endocyst membrane, floating within the cystic content, giving the “water lily sign”.\u003c/p\u003e\u003cp\u003eThe water-lily sign represents a transitional stage between active and inactive disease. The mechanism of the detachment of the membrane is usually due to decreased intracystic pressure, degeneration, host response, trauma or following therapy.\u0026nbsp;\u003c/p\u003e\u003cp\u003e2001 WHO classification of hepatic hydatid cysts\u0026nbsp;is used to assess the stage of\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/hepatic-hydatid-infection?lang=gb\"\u003ehepatic hydatid cysts\u003c/a\u003e\u0026nbsp;on ultrasound and is useful in deciding the appropriate management which depends on the stage of the cyst.\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u0026nbsp;\u003c/p\u003e","id":1757,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/258/a_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":38039},"imageAttributionCaseInfo":{"title":"Hepatic hydatid cyst - ultrasound water lily sign","contributor_name":"Sameer Peer","contributor_param":"sameer602","case_rid":38039,"case_param":"hepatic-hydatid-cyst-ultrasound-water-lily-sign-2"},"firstQuestionPath":"/questions/1757","nextQuestionPath":"/articles/hepatic-hydatid-infection/questions/1100","relatedArticles":[{"id":2281,"title":"Water lily sign (hydatid cyst)","link":"/articles/water-lily-sign-hydatid-cyst-1?lang=us"},{"id":26148,"title":"2001 WHO classification of hepatic hydatid cysts","link":"/articles/2001-who-classification-of-hepatic-hydatid-cysts?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhich stage of hepatic hydatid cyst is shown on this ultrasound image according to the\u0026nbsp;2001 World Health Organization (WHO) classification?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1757"}],"attemptsPercentages":[{"alternativeId":"8726","percentage":14},{"alternativeId":"8729","percentage":5},{"alternativeId":"8725","percentage":3},{"alternativeId":"8728","percentage":12},{"alternativeId":"8727","percentage":67}],"promptToLogin":false,"questionManager":false,"articleId":"hepatic-hydatid-infection"}