(A) Ultrasonographic image of liver showing cystic lesion with thin-walled internal septae in the right lobe with a detached laminated membrane or floating membrane (Water Lily sign) and (B) daughter cysts suggestive of active hydatid cyst. | QJM: An International Journal of Medicine, Volume 112, Issue 1, January 2019, Pages 45–46, https://doi.org/10.1093/qjmed/hcy169