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Rheumatology

Neuropathic joint disease (Charcot arthropathy)

The hot, swollen, painless or mildly painful foot in someone with neuropathy. Which neuropathies hit which joints, the 2 °C temperature rule, X-ray then MRI, telling Charcot from cellulitis and osteomyelitis, and immediate offloading in a non-removable knee-high cast until remission (IWGDF 2023).

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Written with AI assistance and fact-checked against the sources below. For exam study, not clinical decisions. How notes are made

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At a glance

  • Charcot neuro-osteoarthropathy is progressive bone and joint destruction in a limb with loss of protective sensation. Unfelt trauma and autonomic neuropathy (increased blood flow, osteoclast activation through RANKL) drive fractures, dislocation and collapse.
  • In Australia the cause is almost always diabetes, with the midfoot (tarsometatarsal and naviculocuneiform joints) affected most.
  • The active foot is red, hot and swollen with intact skin and less pain than expected. Missed, it collapses into a rocker-bottom foot that ulcerates, gets infected and leads to amputation.

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Sources

Last updated
14 November 2026
What changed
  • 14 November 2026 Personal emails, About story and Australian-style copy

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