fig2

Figure 2. Photomicrographs of the tissue obtained intraoperatively. (a) A slightly disorganized cartilage surrounded by respiratory mucosa complete with bronchial glands and ciliated columnar epithelium (H and E, ×20); (b) cystic formations covered by multiple levels of keratinous squamous epithelial cells containing keratin lamellae (H and E, ×20). H and E: Hematoxylin and eosin stain