Blade of grass sign

Last updated July 18, 2025

Blade of grass sign (also known as flame sign^[1]) is a radiologic sign referring to the lytic fronts seen in the leading edge of the long bone in Paget's disease.^[2] It is usually seen as a wedge shaped area of radiolucency in the diaphysis of long bone.^[1]

References

1 2 Wittenberg, Keith (1 October 2001). "The Blade of Grass Sign" . Radiology. 221 (1): 199–200. doi:10.1148/radiol.2211991689. ISSN 0033-8419. PMID 11568340 . Retrieved 1 November 2021.
↑ Murphy, W. A.; Whyte, M. P.; Haddad, J. G. (March 1980). "Healing of lytic Paget bone disease with diphosphonate therapy". Radiology. 134 (3): 635–637. doi:10.1148/radiology.134.3.7355210. ISSN 0033-8419. PMID 7355210.

This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.

[keith-1] 1 2 Wittenberg, Keith (1 October 2001). "The Blade of Grass Sign" . Radiology. 221 (1): 199–200. doi:10.1148/radiol.2211991689. ISSN 0033-8419. PMID 11568340 . Retrieved 1 November 2021.

[2] Murphy, W. A.; Whyte, M. P.; Haddad, J. G. (March 1980). "Healing of lytic Paget bone disease with diphosphonate therapy". Radiology. 134 (3): 635–637. doi:10.1148/radiology.134.3.7355210. ISSN 0033-8419. PMID 7355210.

[1]

[2]