The teardrop sign is a radiological sign in the pelvic region[^1].
Anatomy
The outer margins of the teardrop sign are formed by the cortical bone layer of the ilium.
Imaging
EnlargeIllustration of the Tear Drop sign on radiography (blue arrow). Figure adapted from Nowak et al. (2021), Acta Neurochirurgica. DOI: 10.1007/s00701-021-04788-1. License: Creative Commons Attribution 4.0 International License.
Clinical Relevance
The teardrop sign can be used to guide the placement of iliac screws during a Spinal fusion[^2].
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