Frontal horn width to intercaudate distance ratio

Frontal horn width to intercaudate distance ratio (FH/CC) is used in assessing patients with suspected Huntington disease. An alternative measurement is intercaudate distance to inner table width ratio (CC/IT).

Measurement

On the same axial plane obtained on the ACPC (anterior commissure and posterior commissure) line, the ratio between the lateral margins of the frontal horns and the distance between the caudate heads (where they are closest).

Interpretation

The normal mean FH/CC ratio range is 2.2 to 2.6. As the caudate heads reduce in volume the CC distance will approach the FH distance, and the ratio will approach 1.

Neurodegenerative diseases

Neurodegenerative diseases are legion and their classification just as protean. A useful approach is to divide them according to underlying pathological process, although even using this schema, there is much overlap and thus resulting confusion.

Article information

rID: 28842
Section: Approach
Synonyms or Alternate Spellings:
  • Frontal horn width to intercaudate distance ratio (FH/CC)
  • FH/CC

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Cases and figures

  • Figure 1: FH/CC
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  • Case 1
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  • Case 2
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