case_images: PMC2816851_01
case_images: High-resolution computed tomography of the chest depicts a well-circumscribed, multiseptate, air-filled cystic lesion in the upper lobe of the right lung.
case_images: jkms-19-458-g001.jpg
case_images: PMC2816851_01_jkms-19-458-g001.jpg
case_images: F1
case_images: High-resolution computed tomography (HRCT) of the chest depicted a well-circumscribed, multiseptate, air-filled cystic lesion in the upper lobe of the right lung, mimicking the feature of type I congenital cystic adenomatoid malformation (Fig. 1).
case_images: 1:1 scaned photograph shows a large intrapulmonary cystic tumor (Ly), causing emphysematous change (Em) in surrounding pulmonary parenchyma (H&E, x1).
case_images: jkms-19-458-g002.jpg
case_images: PMC2816851_01_jkms-19-458-g002.jpg
case_images: F2
case_images: Histopathological examination of the upper lobe revealed a relatively circumscribed intrapulmonary cystic lesion composed of multiple cysts or cavities (Fig. 2).
case_images: The cystic walls (in the right top) of the tumor are supported by loose fibrous tissue and adjoin to the emphysematous lung tissue (in the left) (H&E, x20).
case_images: jkms-19-458-g003.jpg
case_images: PMC2816851_01_jkms-19-458-g003.jpg
case_images: F3
case_images: Their walls were supported by loose fibrous stroma with mild lymphocytic infiltrate (Fig. 3).
case_images: Immunohistochemical staining for factor VIII-related antigen shows weak positive reactions in the lining cells of the cystic walls (Streptavidin-biotin, x100).
case_images: jkms-19-458-g004.jpg
case_images: PMC2816851_01_jkms-19-458-g004.jpg
case_images: F4
case_images: In the immunohistochemical staining the lining cells of the cystic walls were not reactive for epithelial membrane antigen and cytokeratin, but weakly positive for factor VIII-related antigen (Fig. 4).