增强CT对硬化性肺泡细胞瘤的诊断价值

目的:探讨硬化性肺泡细胞瘤的增强CT表现。方法:回顾性分析42例病理确诊的硬化性肺泡细胞瘤患者的CT图像。结果:42例均表现为肺内单发结节或肿块，边界清楚，形态呈圆形（11例）、类圆形（3例）和浅分叶形（28例）。分布呈周围型41例，中央型1例。合并贴边血管征29例，钙化11例，血管强化征8例，晕征6例，空气新月征1例。增强扫描轻度强化3例，中度强化15例，明显强化24例。10例行静脉期扫描，均见延迟强化。病灶直径0.9~8.5 cm，病灶> 3 cm组密度不均匀的概率较病灶≤3 cm组高，差异有统计学意义（P<0.05）。结论:PSP在增强CT上具有强化程度高、持续时间长的特点，结合CT形态学表现和强化特征，有助于该病的诊断。 

The Value of Enhanced CT on the Diagnosis of Pulmonary Sclerosing Pneumocytoma

Objective:To investigate the Enhanced CT features of pulmonary sclerosing pneumocytoma(PSP). Methods:CT information was analyzed in 42 cases of pathologically confirmed PSP. Results:All tumors presented as solitary pulmonary nodules or masses with well-defined outline. The lesions were presented as round shape in 11, oval shape in 3 and mild lobulated in 28. 41 tumors located in the peripheral lung, 1 located in the central lung. "Vascular welt sign" was seen in 29 cases, calcification in 11, "vascular enhancement sign" in 8, "halo sign" in 6, "air crescent sign" in 1.After administration of contrast media, tumors in 3 cases showed slight enhancement, 15 showed moderate enhancement, 24 showed obvious enhancements in arterial phase. The CT value of 10 cases undergoing venous phase scan was further increased compared with that of arterial phase. Diameters of these tumors ranged from 0.9 to 8.5 cm, the probability of inhomogeneous was higher in the > 3 cm group than ≤ 3 cm group(P<0.05). Conclusion:PSP has the characteristics of high degree of enhancement and long duration on contrast-enhanced CT, which is helpful for the diagnosis of this disease in combination with the morphological features.