Animal and animal produce inspired signs

Last revised by Dr Daniel J Bell on 08 Feb 2022

Animal and animal produce inspired signs may sound a little silly, but the radiology literature is replete with such signs, some more fanciful than others.

  • plankton sign: diagnostic on ultrasound of an exudative pleural effusion

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Cases and figures

  • Figure 1: bear's paw sign
    Drag here to reorder.
  • Figure 2: turtleback sign (photo)
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