Table 2.

The imaging capabilities of OCT in gastrointestinal tumors.

Cancer	Authors	Main Findings
Esophageal adenocarcinoma	Rodriguez et al. (2019) (64); Lee et al. (2017) (63)	OCTA can distinguish between LGD and HGD while showing LGD/HGD-related microvascular features with high accuracy. Endoscopic imaging using OCT and laser intraluminal microscopy allows for targeted biopsy to improve the probability of early detection of esophageal tumors.
Colon cancer	Kendall et al. (2022) (70)	OCT can show the “texture” of tissue well and is an excellent way to assess the mucosal thickness and the number of layers for quick identification and classification of tissues.
Gastric cancer	Jansen et al. (2018) (62)	OCT can perform real-time visual blood flow detection imaging in a surgical setting to evaluate the efficacy of surgery or drugs by using Vivo microcirculatory perfusion destined data.