Turtleback sign
Last revised by Cleah Ong-Dobuyan ◉
on 19 Mar 2025
Citation, DOI, disclosures and article data
Citation:
Di Muzio B, Sharma R, Gaillard F, et al. Turtleback sign. Reference article, Radiopaedia.org (Accessed on 24 Mar 2025) https://doi.org/10.53347/rID-47953
rID:
47953
Article created:
Disclosures:
At the time the article was created Bruno Di Muzio had no recorded disclosures.
View Bruno Di Muzio's current disclosures
Last revised:
19 Mar 2025,
Cleah Ong-Dobuyan ◉
Disclosures:
At the time the article was last revised Cleah Ong-Dobuyan had no financial relationships to ineligible companies to disclose.
View Cleah Ong-Dobuyan's current disclosures
Revisions:
11 times, by
11 contributors -
see full revision history and disclosures
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Synonyms:
- Tortoise shell appearance
- Turtle-back liver
- Turtleback liver
- Turtle-shell appearance
- Tortoise shell sign
Turtleback sign or carapace sign, described as tortoise-shell appearance, represents a characteristic appearance of chronic hepatic schistosomiasis in which liver margins are irregular and nodular. Dystrophic calcifications within a polygonal network of fibrous septa are seen in the periphery, often perpendicular to the liver capsule, resembling the turtle's carapace. It is considered pathognomonic for hepatic schistosomiasis due to Schistosoma japonicum or Schistosoma mansoni 2, and associated with fibrosis but not necessarily with liver cirrhosis 3.
References
- 1. Mortelé KJ, Segatto E, Ros PR. The infected liver: radiologic-pathologic correlation. Radiographics. 2004;24 (4): 937-55. Radiographics (full text) - doi:10.1148/rg.244035719 - Pubmed citation
- 2. Singh D, Mukherjee P, Chawla A. Turtleback liver. (2017) Abdominal radiology (New York). 42 (1): 326-327. doi:10.1007/s00261-016-0849-x - Pubmed
- 3. Albertyn L, Albertyn GB, Albertyn CJ, Albertyn FS, Albertyn. Turtleback liver on CT and ultrasound: Schistosoma japonica revisited. (1990) Australasian radiology. doi:10.1111/j.1440-1673.1990.tb02814.x - Pubmed
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