Which finding is most characteristic of fat embolism syndrome after a long-bone fracture?

Which finding is most characteristic of fat embolism syndrome after a long-bone fracture?

• A. Petechial rash
• B. Hemoptysis
• C. Hypertension
• D. Hypothyroidism

Answer: (D)

Petechial rash is the most characteristic finding in fat embolism syndrome after a long-bone fracture. Fat emboli from the injured marrow enter the circulation and lodge in small vessels, especially in the lungs and skin, leading to microvascular occlusion and an inflammatory response. This typically presents with respiratory distress and neurologic changes, but the non-blanching petechial rash on the chest, neck, axillae, or conjunctiva is the hallmark sign. Hemoptysis can occur but is less characteristic, while hypertension and hypothyroidism are not features of this syndrome.

Petechial rash is the most characteristic finding in fat embolism syndrome after a long-bone fracture. Fat emboli from the injured marrow enter the circulation and lodge in small vessels, especially in the lungs and skin, leading to microvascular occlusion and an inflammatory response. This typically presents with respiratory distress and neurologic changes, but the non-blanching petechial rash on the chest, neck, axillae, or conjunctiva is the hallmark sign. Hemoptysis can occur but is less characteristic, while hypertension and hypothyroidism are not features of this syndrome.