20xx年醫(yī)學(xué)專題—海綿狀血管瘤(文件)
【正文】 m (arrowhead). (b) Transverse T2weighted fast SE MR image helps confirm the presence of a type 2 cavernous angioma in the right cingulate gyrus. The lesion has a core of heterogeneously high signal intensity (straight arrow) and a peripheral rim of low signal intensity (arrowhead) related to hemosiderin deposition. A second cavernous angioma (curved arrow) with the same MR imaging features is clearly demonstrated in the left frontal ascending gyrus. The surrounding rim is better demonstrated with a T2weighted sequence, as in b, than with a T1weighted sequence,第十頁，共十八頁。o)CA的主要手段。有認為對無癥狀的較小CA可在臨床及CT或MR監(jiān)護下行保守治療(zh236。li225。病灶周邊也?？梢姾F血黃素沉著及反應(yīng)性膠質(zhì)增生，病灶內(nèi)不含神經(jīng)組織且分界清晰而有別于其它血管畸形。guǎn)瘤為紅色圓形或分葉狀血管(xu232。T1WI以等信號為主，T2WI以高信號為主的混雜信號，周邊有環(huán)形或弧形低信號帶環(huán)繞，混雜信號與病變內(nèi)鈣化、含鐵血黃素沉積(ch233。nɡ)特點,見于各年齡組,然以30~50歲居多,男女比
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