Oshiro Yasuji, Murayama Sadayuki, Sunagawa Utako, Nakamoto Atsushi, Owan Isoko, Kuba Mutsuo, Uehara Tadashi, Miyahira Takumi, Kawabata Tsutomu, Kuniyoshi Masayuki, Ishikawa Kiyoshi, Kinjyo Takao, Fujimoto Kiminori, Yamada Kazuhiko
Department of Radiology, Okinawa National Hospital, National Hospital Organization, Okinawa, Japan.
J Comput Assist Tomogr. 2004 Nov-Dec;28(6):796-800. doi: 10.1097/00004728-200411000-00011.
The purpose of this study was to describe the computed tomography (CT) and pathologic features of 5 nodules of pulmonary dirofilariasis in 4 patients.
Four patients with 5 nodules of pathologically confirmed pulmonary dirofilariasis who under went CT were enrolled, and the imaging interpretations were retrospectively compared with the histopathologic characteristics.
Three of the 4 patients had a solitary nodule, and the remaining patient had 2 nodules. All the nodules were distributed in the right lower lobe and were attached to the pleura. They were all round or oval in shape and ranged in size from 11 to 22 mm in largest diameter (mean=17 mm). On thinner section CT, the nodules had a well-defined smooth margin with or without a shallow notch; they were connected to the arterial branch and, occasionally, to the venous branch. On contrast-enhanced CT, all the nodules contained a homogeneous low-attenuation area, which corresponded to areas of coagulative necrosis on histopathologic examination.
Although the CT findings of a pulmonary dirofilariasis nodule are nonspecific, awareness of the findings on contrast-enhanced CT and the pathologic appearance of this rare benign condition may facilitate its differentiation from a malignant nodule.
本研究旨在描述4例患者5个肺丝虫病结节的计算机断层扫描（CT）及病理特征。
纳入4例经病理证实为肺丝虫病且接受了CT检查的患者，其5个结节，对影像学表现与组织病理学特征进行回顾性对比。
4例患者中3例有单个结节，其余1例有2个结节。所有结节均分布于右下叶并附着于胸膜。它们均呈圆形或椭圆形，最大直径为11至22毫米（平均=17毫米）。在薄层CT上，结节边缘清晰光滑，有或无浅切迹；它们与动脉分支相连，偶尔也与静脉分支相连。在增强CT上，所有结节均有均匀的低密度区，在组织病理学检查中对应于凝固性坏死区域。
尽管肺丝虫病结节的CT表现无特异性，但了解增强CT表现及这种罕见良性疾病的病理表现可能有助于其与恶性结节的鉴别。
