The diagnosis of intramural esophageal squamous cell carcinoma without mucosal invasion using endoscopic ultrasound-guided fine needle aspiration biopsy: A case report.

When an imaging examination suggests a possible malignant lesion of the oesophagus, EUS-FNA may be considered if the surface mucosa contains no endoscopic damage. EUS-FNA has high diagnostic value with high sensitivity, minimal invasiveness, and high safety.