system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Water lily appearance in chest X-ray suggestive of the following condition:
assistant
The correct answer is  Chest X-ray finding of hydatid cyst of the lung: Dense homogenous opacity Collapsed laminated membrane produces an irregular projections in a fluid level due to rupture of the cyst- 'Water-lily appearance' Crescentic cap of air, when it communicates into bronchial tree Ref: Srb's Manual of Surgery By Bhat, 2012, Page 1205.