RID35253 hair-on-end sign

synonym hair-on-end pattern hair-on-end skull spiculated periosteal reaction sunburst periosteal reaction

definition Thin outward striations in the diploic space and widening of the space itself indicate red marrow hyperplasia. Associated with severe anemia, such as thalassemia major.

comment http://radiology.rsna.org/cgi/content/full/221/2/347; http://www.gentili.net/signs/39.htm