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Frontal bossing


Frontal bossing is an unusually prominent forehead, sometimes associated with a heavier than normal brow ridge.

Frontal bossing is seen only in a few rare syndromes, including acromegaly, a chronic disorder caused by too much growth hormone, which leads to enlargement of the bones of the face, jaw, hands, feet, and skull.



  • Acromegaly
  • Basal cell nevus syndrome
  • Congenital syphilis
  • Cleidocranial dysostosis
  • Crouzon syndrome
  • Hurler syndrome
  • Pfeiffer syndrome
  • Rubinstein-Taybi syndrome
  • Russell-Silver syndrome (Russell-Silver dwarf)
  • Use of the antiseizure drug trimethadione during pregnancy


Home Care


There is no home care needed for frontal bossing. Home care for disorders associated with frontal bossing varies with the specific disorder.


When to Contact a Medical Professional


If you notice that your child's forehead looks unusually prominent, talk to your health care provider.


What to Expect at Your Office Visit


An infant or child with frontal bossing generally has other symptoms and signs that, when taken together, define a specific syndrome or condition. The diagnosis is based on a family history, medical history, and thorough physical evaluation.

Medical history questions documenting frontal bossing in detail may include:

  • When did you first notice that the forehead appeared unusually prominent?
  • What other symptoms are present?
  • Have you noticed any other unusual physical characteristics?
  • Has a disorder been identified as the cause of the frontal bossing?
  • If so, what was the diagnosis?

Laboratory studies may be ordered to confirm the presence of a suspected disorder.



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    Frontal bossing


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      Frontal bossing



    Review Date: 12/4/2013

    Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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