Water lily sign (hydatid cyst)
Citation, DOI, disclosures and article data
At the time the article was created Frank Gaillard had no recorded disclosures.
View Frank Gaillard's current disclosuresAt the time the article was last revised Rohit Sharma had no financial relationships to ineligible companies to disclose.
View Rohit Sharma's current disclosures- Water lilly sign
- Camalote sign
- Waterlily sign
- Water-lilly sign
- Water lily
The water lily sign, also known as the camalote sign, is seen in hydatid infections when the inner endocyst detaches from the outer pericyst, resulting in a free-floating membrane within the cyst.
It is classically described on plain radiographs (mainly chest x-ray) when the collapsed membranes are calcified, but may be seen on ultrasound, CT, and MRI.
History and etymology
The water lily sign is termed for its resemblance to a water lily pad floating on water 5. Similarly, camalote is another name for the water hyacinth, a free-floating aquatic plant 6.
Quiz questions
References
- 1. Kerimoglu U, Kapicioglu S, Emlik D et-al. Case 161: hydatid disease with water lily sign manifesting as a soft-tissue mass in the calf of a child. Radiology. 2010;256 (3): 1007-10. doi:10.1148/radiol.10081066 - Pubmed citation
- 2. Gwee A, Chinnappan M, Connell TG et-al. The Water Lily Sign. J. Pediatr. 2013;: . doi:10.1016/j.jpeds.2012.12.068 - Pubmed citation
- 3. Gezgin S, Sanal HT. "Water-lily sign" as a rare finding of spinal hydatidosis. Spine J. 2012;12 (6): e5-7. doi:10.1016/j.spinee.2012.05.013 - Pubmed citation
- 4. Kerimoglu U, Kapicioglu S, Emlik D et-al. Case 161: hydatid disease with water lily sign manifesting as a soft-tissue mass in the calf of a child. Radiology. 2010;256 (3): 1007-10. Radiology (full text) - doi:10.1148/radiol.10081066 - Pubmed citation
- 5. Pendse H, Nawale A, Deshpande S, Merchant S. Radiologic Features of Hydatid Disease. J of Ultrasound Medicine. 2015;34(5):895-905. doi:10.7863/ultra.34.5.895 - Pubmed
- 6. Sierra-Carmona C, Hernández-Orduña M, Murrieta-Galindo R. Alternative Uses of Water Hyacinth (Pontederia Crassipes) from a Sustainable Perspective: A Systematic Literature Review. Sustainability. 2022;14(7):3931. doi:10.3390/su14073931
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