Summary
1) A case of a severe, acquired hemorrhagic diathesis, complicating a carcinoma of the stomach, is reported.
2) The only pathological hemostatic finding was a markedly prolonged bleeding time.
3) Platelets were normal; the capillaries seemed to be normal. There was no increased fibrinolysis, and no other defect in his clotting mechanism could be discovered.
4) The prolonged bleeding time was probably caused by a hitherto undescribed mechanism.