ST BARTHOLOMEW HOSPITAL / SCIENCE PHOTO LIBRARY ST BARTHOLOMEW HOSPITAL / SCIENCE PHOTO LIBRARY
Acrocyanosis of the hands. Close-up of the hands of patient affected by acrocyanosis, compared to a normal hand (left). Acrocyanosis is a blue discolouration of the extremities (hands and feet) due to inadequate blood circulation. This is typically in response to cold temperatures, causing the microcirculation in the fingers and toes to go into spasm.
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