This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Medicine
What is the most likely diagnosis for this finding detected during esophageal endoscopy? 
Select and explain. 
A. Adenocarcinoma, B. Candidiasis, C. Dieulafoy's lesion, D. Schatzki ring
A: Adenocarcinoma
Answer: A: Adenocarcinoma 
Explanation: Answer A. AdenocarcinomaThis nodular abnormality was found to be an early adenocarcinoma in a patient with Barrett's esophagus.