Abstract：
We report a 33-year-old man who presented with recurrent right pneumothorax. Computed tomography (CT) showed the presence of a large bulla with a maximum diameter of 8 cm in the right middle lobe; he subsequently underwent bullectomy. Histopathology revealed that pulmonary parenchyma adjacent to the bulla represented nodular proliferation of clear cells characterized by a papillary structure resembling placental chorionic villi. Immunohistochemically, clear cells were positive for CD10, suggesting placental transmogrification of the lung (PTL). We reviewed 36 surgical cases of PTL, and only 2 cases (5.6%), including our case, were operated for spontaneous pneumothorax. Bullous lesions secondary to PTL tend to appear as unilateral large cystic masses in non-upper lobes, which is atypical for primary spontaneous pneumothorax (PSP). Although PTL is considered a very rare cause of secondary pneumothorax, we must carefully differentiate this condition.
摘要：
我们报告了一名33岁的男性，他出现了复发性右侧气胸。计算机断层扫描（CT）显示右中叶存在一个最大直径为8厘米的大疱；他随后接受了大疱切除术。组织病理学显示，与大疱相邻的肺实质代表透明细胞的结节状增殖，其特征是类似胎盘绒毛绒毛的乳头状结构。免疫组织化学，透明细胞CD10呈阳性，提示胎盘肺移位（PTL）。我们回顾了36例PTL手术病例，只有2例(5.6%)，包括我们的案子,为自发性气胸手术。PTL继发的大疱性病变倾向于表现为非上叶的单侧大囊性肿块，这是非典型的原发性自发性气胸（PSP）。尽管PTL被认为是继发性气胸的非常罕见的原因，我们必须仔细区分这种情况。
