A case of EMRC for basaloid squamous carcinoma of the cervical esophagus

Figure 1 Endoscopic images. A: An endoscopic image shows a protruding lesion located in the cervical esophagus; B: Magnifying endoscopy with narrow-band imaging shows microvessels of type 4 M of the Arima classification.

Figure 2 Resected specimen. A: In a fresh resected specimen, the lesion is defined as 0-I and measures 7 mm × 6 mm; B: The histological diagnosis is basaloid squamous carcinoma (BSC), and tumor invasion depth is limited to the muscularis mucosae (HE, × 40); C: BSC is located in the lamina propria mucosae, and covered by normal squamous epithelium (HE, × 100); D: The tumor consists of oval cells like basal cells (HE, × 200).