Hatchet sign (ankylosing spondylitis)

Hatchet sign refers to the limited erosion of the lateral aspect of humeral head that produces a hatchet shaped deformity. This finding is typically associated with ankylosing spondylitis.

In the absence of osteoporosis and presence of sclerosis this sign helps to differentiate it from rheumatoid arthritis.

Differential diagnosis

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Article information

rID: 26951
Section: Signs
Synonyms or Alternate Spellings:
  • Hatchet sign
  • Hatchet sign in ankylosing spondylitis

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