case_images: PMC5901478_01
case_images: (a) Pseudostratified cilia columnar epithelium resembling tubal epithelium along with occasional small projections toward the lumen in epithelium of the cyst wall (H&E stained section, 400x). (b) Immunohistochemical study demonstrates that the cyst epithelium is nuclear positive for PR and negative for CEA, and SMA staining is negative within the cyst wall indicating no smooth muscle in the cyst wall (400x).
case_images: CRIS2018-5961913.001.jpg
case_images: PMC5901478_01_CRIS2018-5961913.001.jpg
case_images: fig1
case_images: On histopathologic investigation of the specimen, pseudostratified cilia columnar epithelium resembling normal tubal epithelium was identified (Figure 1(a)). Immunohistochemical studies identified the cyst epithelium as having pancytokeratin and progesterone receptor (PR) expressions; it was negative for carcinoembryonic antigens (CEAs), as well as negative for smooth muscle antigen (SMA) in the cyst wall indicating no smooth muscle (Figure 1(b)).