This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pathology
[{'content': 'Postmortem lung specimen of a patient who developed severe respiratory distress and petechiae after fracture of shaft of femur is given below. All are true about the condition given below EXCEPT? \nSelect and explain. \nA. Oil Red O stain for fat, B. Noncardiogenic pulmonary edema, C. Gurd criteria, D. Diffuse white matter petechial hemorrhage', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: Pocket Companion to Robbins, 9th ed. pg. 79* The image shows lung specimen stained with Oil Red O stain and clinical history is consistent with fat embolism.* Non-cardiogenic pulmonary edema is seen with ARDS and not fat embolism.* In contrast the development of fat embolism is due to a series of biochemical cascades resulting from the mechanical insult sustained in major trauma. Release of fat emboli leads to occlusion of the microvasculature.* Findings from non-contrast computed tomography (CT) of the head performed because of alterations in mental status may be normal or may reveal diffuse white-matter petechial hemorrhages consistent with microvascular injury.* GURD criteria are used for diagnosis of fat embolism and one major criterion, four minor criteria, and the presence of macroglobulinemia are required for the diagnosis.', 'role': 'assistant'}]