You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is On barium swallow the grade IV esophageal varices appear as: and explain in detail?
Ans. (b) Mucosal fold below carinaBarium features of Esophageal Varices:* Serpiginous (Worm like) filling defects in esophagus* Varices seen in Barium Swallow below the carina levelThe best investigation to diagnose Esophageal Varices- UGI Endoscopy