Related Experiment Video
Updated: Aug 27, 2025

Modeling Oral-Esophageal Squamous Cell Carcinoma in 3D Organoids
Published on: December 23, 2022
A rare case of esophageal anthracosis presenting as a submucosal tumor
Lijun Song1, Guoliang Zhang2, Jiang Zou2
1Gastroenterology, Tianjin First Central Hospital, China.
Abstract:
A 62-year-old man with a history of heartburn and regurgitation was referred for the management of a black lesion in the middle esophagus. Our Esophagogastroduodenoscopy (EGD) showed a 13 mm, black protruding lesion located 29cm from the incisor teeth. Endoscopic ultrasonography (EUS) showed a 11.7 mm×7.2 mm hyperechoic mass in the esophageal wall arising in layer 2 and 3. Biopsy of the lesion showed a black and elastic hard appearance. Pathological examination showed chronic inflammatory with coal dust underneath the mucosal epithelium.
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