Metopic suture

The metopic suture (also known as the median frontal suture) is a type of calvarial suture. It is often associated with frontal sinus agenesis or hypoplasia 7

This suture runs through the midline across the frontal bone from the nasion to the bregma, although it may often be incomplete. It usually fuses by around 9 months of age 1-4

A premature fusion of the suture is termed metopic synostosis (type of craniosynostosis) with can then result in trigonocephaly

The metopic suture is usually obliterated by about 7 years of age, but in rare cases it can persist 6 as an anatomical variant of little clinical significance but that it can be mistaken for frontal bone fracture.

  • frontal bone fracture
    • metopic sutures have a characteristic midline position and demonstrate sutural interdigitations 4
Head and neck anatomy
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Article Information

rID: 19799
System: Head & Neck
Section: Anatomy
Tags: variant, skull
Synonyms or Alternate Spellings:
  • Persistent metopic suture
  • Frontal suture
  • Median frontal suture

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Cases and Figures

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    Case 1: metopic suture
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    Case 2: persistent metopic suture
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    Case 3: with right frontal sinus aplasia
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    Case 4
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    Case 5
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