Water-lily sign (hydatid cyst)
Last revised by Ian Bickle on 15 Mar 2022
Citation, DOI, disclosures and article data
Citation:
Gaillard F, Bickle I, R R, et al. Water-lily sign (hydatid cyst). Reference article, Radiopaedia.org (Accessed on 08 Dec 2023) https://doi.org/10.53347/rID-2281
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rID:
2281
Article created:
2 May 2008, Frank Gaillard ◈
Disclosures:
At the time the article was created Frank Gaillard had no recorded disclosures.
View Frank Gaillard's current disclosuresLast revised:
15 Mar 2022, Ian Bickle ◉
Disclosures:
At the time the article was last revised Ian Bickle had no recorded disclosures.
View Ian Bickle's current disclosuresRevisions:
25 times, by 17 contributors - see full revision history and disclosures
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Synonyms:
- 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 there is detachment of the endocyst membrane which results in floating membranes within the pericyst that mimic the appearance of a water lily.
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.
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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
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Cases:
- Serpent (snake) sign
- Splenic hydatid cysts
- Hydatid disease, abdominal dissemination
- Pulmonary hydatid cyst with bronchial fistula
- Peritoneal hydatid cyst mimicking a neoplasm
- Hepatic hydatid cyst
- Hepatic hydatid cyst
- Rupture of massive pulmonary hydatid cyst with tension hydropneumothorax
- Calcified hepatic hydatid cyst
- Hepatic hydatid cyst - water-lily sign
- Hepatic hydatid cyst
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- Hydatid cyst within vastus lateralis muscle
- Simultaneous pulmonary and hepatic multiple hydatid cysts
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