Collar sign in diaphragmatic rupture
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At the time the article was created Mohammad Taghi Niknejad had no recorded disclosures.View Mohammad Taghi Niknejad's current disclosures
At the time the article was last revised Mostafa El-Feky had no recorded disclosures.View Mostafa El-Feky's current disclosures
The collar sign, also called the hourglass sign, is a helpful sign for diagnosis of diaphragmatic rupture on coronal or sagittal CT/ MR images and barium studies. It refers to a waist-like or collar-like appearance of herniated organs at the level of the diaphragm.
Small tear on the right side can appear as a subtle focal indentation of the liver on axial images and can be overlooked. This sign requires careful examination of multiplanar reformatted images 5.
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