<prompt> Water -lily sign is seen inHamartomaComplicated hydatid diseaseCavitatory lesion in metastasis of the lungAspergillosis  <response>: Complicated hydatid disease 400 Graingers diagnostic radiology 4thHydatid disease of lung - lower lobes affected in 60 cases Calcification of cyst wall is rare and seen only in 0.7 cases When a mediastinum, vertebral erosion in addition to rib erosion may occur with posterior mediastinum being affected in 65 cases. May be complicated by bacterial infection after cyst rupturesRadio logical signs Meniscus double arch moon cresent sign due to thin radiolucent in upper most part of cyst Combo sign due to air fluid level inside endocyst and air between pcricyst and endocyst Collapsed membranes inside the cyst outlined by air causing serpent sign Completely collapsed crumpled cyst membrane floating on the cyst produces or Water- Lilly sign of camalotte Cyst in cyst sign Radiological sign in pulmonary embolism 1562- H16th Wester mark sign unilateral oligemia Hamptons hump Fleischner lines - long curxilinear densities Felsons sign Pleural effusion greater on the left than right side - Calcification in Popcorn craggy or punctate in Hamartoma 