CHORUS
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Musculoskeletal system
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hyperostosis frontalis interna
overgrowth of bone at the inner table of the frontal bone
- usually bilateral and symmetrical
- chiefly in females > 35 y.o.
- no clinical siginificance
- unknown etiology
- irregular cortical thickening of the frontal area
- spares areas occupied by superior sagital sinus and venous channels
- may be 1 cm or thicker
- occasionaly extends to parietal bones and orbital roofs
- hyperostosis calvariae diffusa:
- variant of HFI: more diffuse thickening of vault (involving both tables)
see: increased skull thickness
Yong H. Hahn, MD - 2 February 1995
Last updated: 1 October 2013
Copyright © 2013, Charles E. Kahn, Jr.
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