病历摘要：男性：68岁中耳炎术后，头痛、呕吐、发热2天。<img src="/Image1/dd/dd90eb05ea7d97e0300aa6e01314a4a0.jpg" /><img src="/Image1/a8/a87ed2da6181a675572e84741a6def77.jpg" /><img src="/Image1/dd/dd08e1ae31a43075f19c3bb073120fe1.jpg" /><img src="/Image1/2a/2a506b72e6d435659523c1e58102e8e8.jpg" /><img src="/Image1/4a/4a2c855bd06948f936383db0af17b216.jpg" /><img src="/Image1/de/ded3f16d96c12640cf8b99545076c210.jpg" /> 3：鉴别诊断有哪些？