Charcot joints are demonstrated in this boy with HSAN IV or congenital insensitivity to pain with anhidrosis (CIPA)

<p><b>Copyright information:</b></p><p>Taken from "Hereditary sensory and autonomic neuropathies: types II, III, and IV"</p><p>http://www.OJRD.com/content/2/1/39</p><p>Orphanet Journal of Rare Diseases 2007;2():39-39.</p><p>Published online 3 Oct 2007</p><p>PMCID:PMC2098750.</p><p></p> The left knee and left ankle are enlarged and distorted. The skin over the medial aspect of the ankle is darkened with a draining would secondary to superimposed osteomyelitis. There are other areas of trauma and ulcers including a site on the left heel