This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Fat embolism syndrome is most commonly seen after ? 
Select and explain. 
A. Femur fracture, B. Acetabular fracture, C. Pelvis fracture, D. Calcaneal fracture
A: Femur fracture
Answer: A: Femur fracture 
Explanation: Ans. is 'a' i.e., Femur fracture Fat embolism means circulation of fat globule away from its site of origin. When fat embolism causes symptoms it is called fat embolism syndrome. Causes of fat embolism Fracture of long bone (most common) - Blunt trauma Recent Coicosteroid administration Soft tissue trauma Acute pancreatitis Burns D.M. Parenteral lipid infusion Liposuction Sickle cell crisis Decompression sickness