Which bleeding manifestation is most characteristic of severe factor VIII deficiency?

Which bleeding manifestation is most characteristic of severe factor VIII deficiency?

• A. Severe hemorrhage following moderate to severe trauma
• B. Spontaneous hemarthosis
• C. Gynecologic hemorrhage
• D. Petechial rash

Answer: (B)

The main idea here is that severe factor VIII deficiency (hemophilia A) leads to problems in the intrinsic coagulation pathway, resulting in a tendency for deep tissue bleeding, especially into joints. Spontaneous hemarthrosis—bleeding into joints without significant trauma—is the classic and most characteristic manifestation. Joints such as knees, ankles, and elbows are commonly involved, and recurrent bleeding can cause chronic joint damage if not treated. Why this stands out: while bleeding after an injury can occur in people with coagulation disorders, the hallmark of severe hemophilia is spontaneous joint bleeding rather than superficial or mucocutaneous bleeding. The other options reflect issues more typical of platelet disorders or mucosal bleeding: gynecologic hemorrhage can occur but is not the defining feature; petechiae indicate capillary bleeding from platelet dysfunction or low platelets rather than a pure clotting factor defect.

The main idea here is that severe factor VIII deficiency (hemophilia A) leads to problems in the intrinsic coagulation pathway, resulting in a tendency for deep tissue bleeding, especially into joints. Spontaneous hemarthrosis—bleeding into joints without significant trauma—is the classic and most characteristic manifestation. Joints such as knees, ankles, and elbows are commonly involved, and recurrent bleeding can cause chronic joint damage if not treated.

Why this stands out: while bleeding after an injury can occur in people with coagulation disorders, the hallmark of severe hemophilia is spontaneous joint bleeding rather than superficial or mucocutaneous bleeding. The other options reflect issues more typical of platelet disorders or mucosal bleeding: gynecologic hemorrhage can occur but is not the defining feature; petechiae indicate capillary bleeding from platelet dysfunction or low platelets rather than a pure clotting factor defect.