A．診斷應(yīng)考慮：皮樣囊腫、膽脂瘤、蛛網(wǎng)膜囊腫等
B．囊壁有無(wú)鈣化對(duì)皮樣囊腫與蛛網(wǎng)膜囊腫的鑒別無(wú)幫助
C．占位效應(yīng)有助于皮樣囊腫與蛛網(wǎng)膜囊腫的鑒別
D．壁有無(wú)強(qiáng)化有助于皮樣囊腫與蛛網(wǎng)膜囊腫的鑒別
E．周圍有無(wú)水腫有助于皮樣囊腫與星形細(xì)胞瘤的鑒別

A．診斷應(yīng)考慮：膽脂瘤、膠質(zhì)瘤等
B．側(cè)腦室增寬應(yīng)首先考慮腦外病變
C．腦池增寬應(yīng)首先考慮膠質(zhì)瘤
D．腦池形態(tài)一致應(yīng)首先考慮聽(tīng)神經(jīng)瘤
E．掃描病灶無(wú)強(qiáng)化不首先考慮聽(tīng)神經(jīng)瘤