Kitami Akihiko, Kamio Yoshito, Uematsu Shugo, Sato Yoko, Kadokura Mitsutaka
Respiratory Disease Center, Showa University Northern Yokohama Hospital, 35-1 Chigasaki-chuo, Tsuzuki-ku, Yokohama, Kanagawa 224-8503, Japan.
Gen Thorac Cardiovasc Surg. 2007 Jul;55(7):281-3. doi: 10.1007/s11748-007-0123-9.
A 33-year-old asymptomatic woman was referred to our hospital for evaluation of an abnormal shadow on a chest radiograph. A chest-computed tomogram revealed a cystic, partially solid tumor in the right inferior mediastinum. Following an initial diagnosis of cystic teratoma, surgery was performed. The tumor, a well-encapsulated, thin-walled cyst located within the right inferior lobe of the thymus, was extirpated by partial resection of the thymus. The cut surface revealed a unilocular cyst containing multiple grayish-white tumors on the inner cyst walls. Some tumors detached from the wall owing to loose connections. Microscopic findings revealed that the cyst was lined with squamous epithelium. The tumor on the cyst wall was diagnosed to be a type B1 thymoma. Based on these findings, we diagnosed this case as a thymoma originating from the wall of a thymic cyst, accompanied by intracystic dissemination from the tumor.
一名33岁无症状女性因胸部X线片上的异常阴影被转诊至我院。胸部计算机断层扫描显示右下纵隔有一个囊性、部分实性肿瘤。初步诊断为囊性畸胎瘤后，进行了手术。肿瘤是一个包膜完整、薄壁的囊肿，位于胸腺右下叶内，通过部分切除胸腺将其摘除。切面显示为单房囊肿，囊内壁有多个灰白色肿瘤。一些肿瘤由于连接松散而从囊壁脱落。显微镜检查结果显示囊肿内衬鳞状上皮。囊壁上的肿瘤被诊断为B1型胸腺瘤。基于这些发现，我们将该病例诊断为起源于胸腺囊肿壁的胸腺瘤，并伴有肿瘤的囊内播散。
