Fig. 4From: A novel Lugol’s iodine staining technique to visualize the upper margin of the surgical anal canal intraoperatively for Hirschsprung disease: a case seriesa A representative endocytoscopic image, showing the boundary (white dotted line) between the simple columnar epithelium and stratified squamous epithelium. b The simple columnar epithelium has a small regular nucleus at the marginal region of the glandular structure (a white oval). c The stratified squamous epithelium has a small nucleus with cytoplasm-rich cells, in a regular arrangementBack to article page