Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2023 Jan 3;13(2):1138–1163. doi: 10.21037/qims-22-728

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

2023 Quantitative Imaging in Medicine and Surgery. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

PMC Copyright notice

The classification raised by Tirelli. (A) Normal pattern in type 1 epithelium: (a) posterior hard palate appearance on NBI endoscopy. Superficial mucosal capillaries (thin arrow), submucosal veins (thick arrow), and flower-like structures (circle); (b) superficial mucosal capillaries, submucosal veins (in cyan), and flower-like structures; (c) schematic drawing. (B) Normal pattern in type 2a epithelium: (a) floor of mouth appearance on NBI endoscopy. Superficial mucosal capillaries (thin arrow), submucosal veins (thick arrow); (b) superficial mucosal capillaries and submucosal veins (in cyan); (c) schematic drawing. (C) Normal pattern in type 2b epithelium: (a) inferior trigone appearance on NBI endoscopy. Superficial mucosal capillaries (circle, rectangle), submucosal veins (arrow); (b) superficial mucosal capillaries and submucosal veins (in cyan); (c) schematic drawing. (D) Dysplastic pattern in type 1 epithelium: (a) severe dysplasia of the hard palate on NBI endoscopy. A well-demarcated brownish/purple area with thick dark spots is visible (circle); it is perpendicularly reached by dilated light blue vessels (arrows); (b) the well-demarcated brownish/purple area perpendicularly reached by dilated light blue vessels (in cyan); (c) schematic drawing. (E) Dysplastic pattern in type 2a epithelium: (a) severe dysplasia of the floor of mouth on NBI endoscopy. A well-demarcated brownish/purple area with thick dark spots is visible (circle); it is perpendicularly reached by dilated light blue vessels (arrows); (b) the well-demarcated brownish/purple area perpendicularly reached by dilated light blue vessels (in cyan); (c) schematic drawing. (F) Dysplastic pattern in type 2b epithelium: (a) severe dysplasia of an inferior trigone on NBI endoscopy. Mesh (circle), leukoplakia (rectangle) and the submucosal vessels (arrow); (b) the image resembles a mesh, leukoplakia, and the submucosal vessels (in cyan); (c) schematic drawing. (G) Neoplastic pattern in an ulcerated cancerous lesion: (a) ulcerated cancer of the hard palate on NBI endoscopy. Necrosis in the center of the lesion (circle), dark green spots (rectangle), dilated winding vessels or bobby-pin (arrow); (b) dark green spots, dilated winding vessels, or bobby-pin; (c) schematic drawing. (H) Neoplastic pattern in a vegetating cancerous lesion: (a) vegetating cancer of the floor of mouth on NBI. Unstructured vessels appearing as dark green spots, dilated winding vessels or as bobby-pin (arrow); (b) dark green spots, dilated winding vessels, or bobby-pin; (c) schematic drawing. This figure is licensed by John Wiley and Sons. NBI, narrow-band imaging.