This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous System, Subject name: Pediatrics
Subdural empyema is a complication of all the following conditions except? 
Select and explain. 
A. Frontal Sinusitis, B. Skull vault osteomyelitis, C. Middle ear disease, D. Boil over face
D: Boil over face
Answer: D: Boil over face 
Explanation: d. Boil over face(Ref: Nelson's 20/e p 2936-2948, Ghai 8/e p 563-565)Infections of the sinuses, ear and skull bones can lead to Subdural empyema.