Fig. 4

Histopathological examination was performed on an Olympus CX43 Biological Microscope and cellSens acquisition software. The Olympus CX43 settings were as follows: trinocular tube 2 with two widefield eyepieces for FN20, WHB10× objective in the light path, digital camera for microscope (DP22), and U-25LBD microscope polarizing filter (batch number 6,397,600). Histopathological examination with haematoxylin and eosin stain of the cystic lesion showed the characteristic ciliated pseudostratified columnar epithelium and cyst wall comprising fibrous tissue, inflammatory cells, and smooth muscle (original magnification ×100)