晕征与反晕征.ppt

晕征与反晕征
结节与肿块
CT表现：致密影
 直径＜5mm称微结节
 （2～3mm粟粒结节）
 直径5 ～10mm称小结节
 ≥10mm者统称结节
一般将小于等3cm者称为结节，大于3cm者称为肿块。
t lung. B: Macroscopic lung slice showing several round hemorrhagic lesions. C: Macroscopic image of nodules containing hemorrhagic areas, fibrin, and tumor cells (hematoxylin-eosin,magnification ×10).
二晕征-肿瘤性疾病-出血性瘤结节
细支气管肺泡癌
消化系、胰腺、肺腺癌
淋巴瘤
二晕征-肿瘤性疾病-瘤细胞浸润
Bronchioloalveolar carcinoma in a patient with chronic cough. A:
Computed tomography scan of the chest shows nodules with a halo sign in the right lung, with some pseudocavitation (arrow). Also visible is a considerable area of consolidation in the left lung. B: Microscopic image showing thickened alveolar walls (asterisks) due to infiltration by tumor cells (arrows) ematoxylin-eosin ,magnification ×10).
二晕征-肿瘤性疾病-瘤细胞浸润
Pulmonary lymphoma in a 73-year-old patient who visited the emergency service with dyspnea. A: An axial scan of the lower pulmonary lobes shows multiple pulmonary nodules with a halo sign and a tendency to coalesce in the posterior segments. There is also bilateral pleural effusion, somewhat greater on the right side. The patient died 3 weeks after admission. B: Low magnification image of pulmonary nodule showing mainly peribronchovascular tumor cell infiltration and marked necrosis (hematoxylin-eosin, magnification ×4). C: A higher-magnification image of the periphery of the nodule shows the infiltration of tumor cells along the alveolar walls (arrows) (hematoxylineosin,magnification ×10).
出血性结节
非出血性结节
三晕征-非感染性疾病
三晕征-非感染性疾病-出血性结节
韦格纳肉芽肿
子宫内膜异位症
活检
Wegener granulomatosis. A: Computed tomography scan showing 2 pulmonary nodules surrounded by a halo (arrows) and an area of consolidation
in the left lower lobe (asterisk), also with a halo sign. The patient, whose first symptom was hemoptysis, also had rapidly progressing glomerulonephritis肾小球肾炎B: Microscopic image showing inflammatory infiltration of the arterial wall with a multinucleated gia