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目的分析肺微浸润性腺癌(MIA)的高分辨率CT(HRCT)表现,提高MIA的CT诊断准确性。方法收集经手术病理证实的84例患者共92个MIA,术前均行常规HRCT扫描。结果 92个MIA最大长径0.4~2.6 cm,其中纯磨玻璃密度结节(p GGN)56个(61%),病灶密度(-534.40±137.71)HU;混合磨玻璃密度结节(m GGN)36个(39%)。54例患者为单发病灶,30例患者为多发病灶(共38个MIA);空泡征5个,结节边缘清晰84个,分叶征32个,血管聚集征65个,血管供应征(血管增粗)40个,细支气管扩张征9个,胸膜牵拉、凹陷31个。结论 MIA多数表现为p GGN,CT值(-534.40±137.71)HU,少部分表现为m GGN,病灶多<2 cm,单发、边缘清楚,伴有血管聚集征。HRCT有助于MIA的显示和早期诊断。
Objective To analyze the performance of high resolution CT (HRCT) in lung microinvasive adenocarcinoma (MIA) and improve the diagnostic accuracy of MIA. Methods A total of 92 MIA patients were collected from 84 patients confirmed by surgery and pathology. All patients underwent routine HRCT before operation. Results The maximum diameter of 92 MIA was 0.4-2.6 cm, including 56 (61%) pGGN and -534.40 ± 137.71 HU, mGGN, 36 (39%). 54 patients were single lesions, 30 patients were multiple lesions (a total of 38 MIA); vacuolar sign 5, nodular edge clear 84, lobulation sign 32, vascular aggregation sign 65, vascular supply sign Vascular thickening) 40, bronchiectasis sign in 9, pleural traction, depression 31. Conclusions The majority of MIA showed pGGN, the CT value was (-534.40 ± 137.71) HU, the minor part was mGGN. The lesions were more than 2 cm in size. The lesions were single and the margin was clear with vascular aggregation. HRCT helps MIA’s display and early diagnosis.