]> 2026-07-31T11:52:02+00:00 WBR0254 0 en Factor V Leiden Glanzmann’s thrombasthenia Hemophilia A Hemophilia B Isolated protein C deficiency While Protein C is decreased by vitamin K deficiency, the main feature of vitamin K deficiency is a decrease in coabulability. Isolated protein C deficiency causes hypercoagulability. Pathophysiology An 86-year-old man is brought by EMS to the emergency department (ED) with an altered mental state. Blood work-up is remarkable for leukocytosis and elevated CRP. Chest-xray demonstrates consolidation in the left lower lobe. In the ED, the patient desaturates and requires mechanical intubation. The patient is admitted to the intensive care unit for antimicrobial therapy. A few days later, the patient develops subcutaneous ecchymoses. His lab tests reveal prolonged INR and aPTT at the upper limit of normal. The mechanism of the patient's clotting abnormality is similar to which of the following bleeding conditions? C Hematology 2020-10-27T23:56:04Z 2459150.4972685 WBR0254