<prompt> Which of the following is not a sign of pulmonary hydatidosis?Water lily signRising sun signMeniscus signDrooping lily sign  <response>: Chest Xray of pulmonary hydatidosis shows a dense homogenous opacity.Ruptured hydatid cyst with collapsed laminated membrane produces irregular projections in a fluid level-Water-lily sign.It also shows Meniscus sign or crescentic cap of air when it communicates into bronchial tree.Other signs include Rising sun or Daughter cyst sign,Air-bubblesign,etc. Reference:SRBs manual of surgery,5th edition,page no:1125 