Congenital insensitivity to pain with talar avascular necrosis and neuropathic arthropathy of the ankle joint

Congenital insensitivity to pain with anhydrosis [CIPA], is a very rare genetic disorder characterized by recurrent episodes of unexplained fever, inability to feel pain and temperature, generalized anhydrosis, self-mutilating injuries and mental retardation. We present a case of a 8-year-old boy with these criteria who presented with gross right ankle swelling, collapse and avascular necrosis of the talus that was treated conservatively with non-weight-bearing cast