20xx年醫(yī)學(xué)專題—孤立性肺結(jié)節(jié)：良性與惡性對比(已改無錯字)
2024-11-17 22 本頁面
【正文】 n Only solid lesions had a malignancy rate of only 7%.完全實性結(jié)節(jié)是僅完全實性結(jié)節(jié)是僅 7%是惡性結(jié)節(jié)是惡性結(jié)節(jié)第十八頁，共三十頁。n Partly solid nodule containing groundglass ponent most likely to be malignant第十九頁，共三十頁。n On the far left a lesion that only has a groundglass appearance and next to it a lesion that has both groundglass and solid ponents.The likelihood of malignancy is 1:5 for the lesion on the far left and 2:3 for the lesion with both groundglass and solid ponents.第二十頁，共三十頁。n LEFT: 1 in 5 malignant左邊圖是左邊圖是 5個病灶個病灶 1個為惡性個為惡性 (232。 x236。ng)結(jié)節(jié)結(jié)節(jié)n RIGHT: 2 in 3 malignantn 右邊圖是右邊圖是 3個病灶個病灶 2個為惡性結(jié)節(jié)個為惡性結(jié)節(jié)第二十一頁，共三十頁。Contrast enhancement對比對比 (du236。bǐ)增強增強n Contrast enhancement less than 15 HU has a very high predictive value for benignity (99%).After a baseline scan, 4 consecutive scans at 1 minute interval are performed.對比對比 (du236。bǐ)增強小于增強小于 15HU是良性病變的可能性是良性病變的可能性（（ 99%））第二十二頁，共三十頁。n This applies only for nodules with the following selection criteria:n Nodule 5mm 結(jié)節(jié)大于結(jié)節(jié)大于 5mmn Relatively spherical 相對圓形相對圓形n Homogeneous, no necrosis, fat or calcificationn 均勻，無壞死、鈣化均勻，無壞死、鈣化 (g224。ihu224。) n No motion or beam hardening artifacts n 沒有運動、硬射線偽影沒有運動、硬射線偽影第二十三頁，共三十頁。PETCT: benign versus malignantn PETCT plays an increasingly important role in the evaluation of solitary nodules. n PETCT在肺結(jié)節(jié)的評價中起著很重要在肺結(jié)節(jié)的評價中起著很重要 (zh242。ngy224。o)作用作用第二十四頁，共三十頁。n PET has a very high sensitivity 95%, but a lesser specificity of only 81% n PET有很高的敏感性有很高的敏感性 95%，但特異性僅為，但特異性僅為 81%n PET is false positive in granulomatous disease n PET是假陽性在炎癥性疾病是假陽性在炎癥性疾病 (j237。b236。ng)中國中國n PET is usually false negative in size 10 mm and lowgrade malignancy including bronchoalveolar carcinoma and carcinoid n 當(dāng)病變小于當(dāng)病變小于 19 mm時或低度惡性時，時或低度惡性時， PET表現(xiàn)為假陰性，表現(xiàn)為假陰性，包括支氣管肺泡癌和類癌包括支氣管肺泡癌和類癌第二十五頁，共三十頁。False negative PET in a
教學(xué)教案相關(guān)推薦
鄂ICP備17016276號-1