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Turtleback sign

Last revised by Kyriacos S. Evangelou on 29 Jul 2021

Turtleback sign, also known 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.

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Cases and figures

  • Figure 1: turtleback (photo)
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