Ishikawa Hiroyuki, Koizumi Naoya, Naito Makoto, Umezu Hajime, Morita Tetsurou, Nemoto Takeo, Saito Tomoo, Okuizumi Mina, Sasai Keisuke
Division of Radiation Oncology, Division of Cellular and Molecular Pathology, Graduate School of Medical and Dental Science, Niigata University.
Nihon Igaku Hoshasen Gakkai Zasshi. 2003 Jul;63(6):311-5.
To clarify the high-resolution CT(HRCT) findings of pulmonary atypical adenomatous hyperplasia (AAH) of 5 mm or less in diameter.
We evaluated the HRCT findings of 43 histopathologically confirmed AAH of 5 mm or less in diameter in 7 patients who underwent lobectomy for pulmonary adenocarcinoma. For comparison, we also examined the HRCT findings of 13 bronchioloalveolar carcinomas (BAC) of the same size from these patients.
We identified 36 of 43 AAH and all 13 BAC on HRCT performed with multidetector-row CT. Thirty-five AAH and 11 BAC showed ground-glass opacity without any high-attenuation component. Margins of 20 AAH were well defined, and 16 were ill defined. In BAC, 11 lesions demonstrated well-defined margins, with only 2 showing ill-defined margins.
Most AAH lesions of 5 mm or less in diameter are identified as ground-glass opacity on HRCT. Detection of minute ground-glass opacity is important in locating AAH on HRCT.
明确直径5mm及以下的肺部非典型腺瘤样增生（AAH）的高分辨率CT（HRCT）表现。
我们评估了7例因肺腺癌接受肺叶切除术患者中43个经组织病理学证实的直径5mm及以下的AAH的HRCT表现。为作比较，我们还检查了这些患者中13个相同大小的细支气管肺泡癌（BAC）的HRCT表现。
在使用多排探测器CT进行的HRCT上，我们识别出了43个AAH中的36个以及所有13个BAC。35个AAH和11个BAC表现为磨玻璃影，无任何高密度成分。20个AAH的边缘清晰，16个不清晰。在BAC中，11个病灶边缘清晰，只有2个边缘不清晰。
大多数直径5mm及以下的AAH病灶在HRCT上表现为磨玻璃影。在HRCT上检测微小磨玻璃影对于定位AAH很重要。
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