病历摘要：男性，35岁。头痛、恶心、呕吐，体查共济失调。行CT检查。<img src="/Image1/a0/a024047288111aad9974e68f008d06b3.jpg" /><img src="/Image1/5d/5ddd6733dc4699a372ec0a6e44e69ef9.jpg" /><img src="/Image1/c2/c20b53c65d066baff0fd4e314733c4dc.jpg" /><img src="/Image1/44/4469f0b44f70dfd785fdf58f1afe95c4.jpg" /><img src="/Image1/2b/2b56ea58dee4367f79a3e3b9b37fd9db.jpg" /><img src="/Image1/35/3572a21ec691f933690f06dad4363a91.jpg" /> 3.鉴别诊断有哪些？