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Blade of grass sign (Paget disease)

Dr Daniel J Bell and almehdi et al.

The blade of grass sign, also called the candle flame sign, refers to the lucent leading edge in a long bone seen during the lytic phase of Paget disease of bone

The blade of grass sign is characteristic of Paget disease of bone. This is akin to osteoporosis circumscripta cranii seen in the skull. A potential pitfall is misdiagnosing the track sign of the femur as the blade of grass sign.

See also

Other Paget disease-related signs:

Article information

rID: 3820
Section: Signs
Synonyms or Alternate Spellings:
  • Blade of grass sign (Paget disease)
  • Blade of grass appearance (Paget disease)
  • Candle flame sign (Paget disease)
  • Candle flame appearance (Paget disease)
  • Flame sign (Paget disease)

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Cases and figures

  • Figure 1: blade of grass (photo)
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  • Case 1
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  • Case 2
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