Coughlin classification

Dr Daniel J Bell et al.

The Coughlin classification is the most widely used to type bunionettes. It relies on simple angle measurements on weightbearing foot radiographs taken in the dorsoplantar projection 1,2. In 2013 DiDomenico et al added type IV 2.

Classification
Type I
  • enlarged lateral surface of the head of the 5th metatarsal
Type II
  • irregular lateral bowing of the distal 5th metatarsal
  • 4th to 5th intermetatarsal angle (4-5 IMA) is normal
  • lateral deviation angle is abnormal
Type III
  • 4th to 5th intermetatarsal angle (4-5 IMA) is abnormal
  • lateral deviation angle is normal
Type IV
  • any combination of types I-III

 

Share article

Article information

rID: 66214
Tag: cases
Synonyms or Alternate Spellings:
  • Coughlin's classification of bunionettes

Support Radiopaedia and see fewer ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.