Cliff sign (hip micro-instability)

Dr Henry Knipe and Dr Subhan Iqbal et al.

The cliff sign in hip microinstability is a steep drop-off and loss of normal sphericity of lateral femoral head.

Radiographic features

Plain radiograph
  • Shenton line distortion
  • subluxation of the femoral head
  • sclerosis of the femoral neck
MRI
  • <3 mm anterior lateral capsule
  • >5 mm anterior capsular recess
  • posterior-inferior post contrast accumulation 4

Article information

rID: 77307
Section: Signs
Tag: cases
Synonyms or Alternate Spellings:

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