【名词&注释】
膝关节(knee joint)、股骨头缺血性坏死(avascular necrosis of femoral head)、髋关节后脱位(posterior dislocation of hip joint)、坐骨神经损伤(sciatic nerve injury)
[多选题]髋关节后脱位时,可发生下列哪种情况
A. 股骨头缺血性坏死 B. 膝关节积血 C. 髋臼缘骨折 D. 股骨头骨折 E. 坐骨神经损伤(sciatic nerve injury)