腎上腺腫塊mr的特征及診斷-在線瀏覽
2025-07-13 18:14本頁(yè)面
【正文】 of the specimen shows a wellcircumscribed bright yellow nodule, an appearance that is typical of adrenocortical adenoma. 增強(qiáng)時(shí)均勻一致強(qiáng)化也是腎上腺腺瘤的特征，腎上腺腺瘤小的，圓點(diǎn)狀信號(hào)強(qiáng)度改變可能是由于囊變，出血或血供的差異。亞急性期， T1WI高信號(hào)， T2WI開始低信號(hào)，隨后呈高信號(hào)。 Figure 5. Axial T1weighted outofphase MR image shows an adrenal adenoma (black arrow) with a focal area of highsignalintensity hemorrhage (white arrow). 2，髓樣脂肪瘤 髓樣脂肪瘤是不常見的良性腫瘤。大部分是在偶然時(shí)發(fā)現(xiàn)。 髓樣脂肪瘤根據(jù) MR信號(hào)特征分為三類： 1)以脂肪成分為主型： T1WI均勻高信號(hào)， T2WI中等信號(hào)。 3)髓樣成分為主型：相對(duì)于肝臟， T1WI低信號(hào)， T2WI高信號(hào)，增強(qiáng)有強(qiáng)化。巨大髓樣脂肪瘤要和腹膜后像脂肪肉瘤鑒別。 HE stain) shows the typical microscopic appearance of myelolipoma. There is fat and a maturing marrow element on the right side and an otherwise normal adrenal cortex on the left. 五，囊性腫塊 腎上腺囊腫罕見，經(jīng)常是偶然發(fā)現(xiàn)或尸檢發(fā)現(xiàn)，尸檢發(fā)病率約%~% 。囊腫出血，破裂或感染時(shí)出現(xiàn)急性癥狀。占腎上腺囊腫約 40%。 Figure 7. (a, b) Coronal T1weighted inphase and T2weighted halfFourier RARE MR images show an oval, wellcircumscribed, right adrenal cyst (arrow in b) with a thin wall (arrowhead in b). The cyst has a typical appearance, showing low signal intensity at T1weighted imaging and high signal intensity at T2weighted imaging. Photomicrograph (original magnification, 100。占腎上腺囊腫約 39% 。 Figure 8. Axial T2weighted MR image obtained with inversion recovery shows a left adrenal pseudocyst. Note the softtissue ponent in the wall and the posteriorly located calcification (arrow). Photograph of the specimen shows a wellcircumscribed cystic mass with abundant gummous tan material pressing the nearby kidney (arrowhead) without infiltrating it or the surrounding soft tissue. Figure 9. (a, b) Coronal T2weighted MR image obtained with halfFourier RARE and axial contrast enhanced VIBE image show a left adrenal mass with areas of signal intensity similar to that of blood. Photograph of the specimen shows a hemorrhagic plicated adrenal cyst with hyalinized material. 3， 淋巴管瘤 腎上腺囊性的淋巴管瘤罕見，沒有癥狀。 表現(xiàn)為具有薄壁的 T1WI低信號(hào) T2WI高信號(hào)，沒有軟組織成分，沒有強(qiáng)化。因?yàn)橐徊糠质茹t細(xì)胞瘤也表現(xiàn)出中等信號(hào)。 嗜鉻細(xì)胞瘤也被稱為“ 10%腫瘤”。 Figure 11. (a–c)
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