New Diagnostic Approach for Esophageal Squamous Cell Neoplasms Using Linked Color Imaging and Blue Laser Imaging Combined with Iodine Staining.

Tsunoda M1, Miura Y1, Osawa H1, Khurelbaatar T1, Sakaguchi M2, Fukuda H1, Lefor AK3, Yamamoto H1.

Clin Endosc. 2019 Apr 16. doi: 10.5946/ce.2018.195. [Epub ahead of print]

62-year-old man with a flat early esophageal cancer was referred for endoscopic treatment. White light imaging revealed a pale red lesion, whereas linked color imaging (LCI) and blue laser imaging (BLI) yielded purple and brown images, respectively. Iodine staining demonstrated a large unstained area with a homogenous but very weak pink-color sign. This area appeared more clearly as purple and green on LCI and BLI, respectively; however, a different colored portion was observed at the 4 o’clock position inside the iodineunstained area. Histopathology findings of the resected specimen revealed squamous intraepithelial neoplasia at the 4 o’clock position and an esophageal squamous cell carcinoma in the remaining iodine-unstained area. LCI and BLI combined with iodine staining produce characteristic images that overcomes the pink-color sign, reflecting the histological features of a flat esophageal neoplasm. This new method is useful for detailed evaluation of early flat squamous cell neoplasms.

1 Division of Gastroenterology, Department of Medicine
2 Department of Diagnostic Pathology
3 Department of Surgery, Jichi Medical University, Shimotsuke, Japan