You evaluate a patient in January for a wound on her leg. Th…

You evaluate a patient in January for a wound on her leg. The wound is located anteriorly on the distal half of her leg.  It is 2.3 x 2.4 x 1.7 cms.  It is comprised of 70% yellow slough, and 30% pink granulation that is thin and flat.  The wound is dry and has little drainage on the dressing.  What etiology is most likely based on this information?