Carcinoma from a Corn (1943) - swipe to see the front. According to my archives, “The distal half of a foot showing a malignant ulcer of classical appearance on the sole. The ulcer, which is hard with raised edges and an irregular floor, is firmly fixed to underlying structures. The surface bled easily to the touch.
The growth arose at the site of a small area of infection following overzealous ‘cutting’ of a soft corn. It was treated by a black ointment and after a latent period grew very rapidly in width and depth"
Basically this means the person had a corn which is a hard, thickened area of skin that forms due to rubbing, friction or pressure. They've overzealously tried to cut this hard skin off and its eventually formed a malignant ulcerating tumour. 'Ulcerating' means the skin has broken down and you can see what lies underneath it (the underlying tissue). When a cancerous (malignant) tumour occurs it often has a discharge, may bleed, may become infected and may cause an unpleasant smell. I'm not sure why there is a connection between injuries and cancer and one site states "Injuries cannot cause cancer but an injury may lead to finding cancer in the injured area". But it's very strange because there are at least 200 specimens in my collection in which a person has cancer in the exact same place they 'broke a bone' or were 'hit by a cricket ball' and it occurs years after the initial injury. Another site says "Sometimes a person might visit the doctor for what’s thought to be an injury and cancer is found at that time. But the injury did not cause the cancer; the cancer was already there." But that doesn't make sense in our examples. More research is needed!
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