This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: Medicine
Volcano ulcers in esophagus are seen in - 
Select and explain. 
A. Herpetic esophagitis, B. Candida esophagitis, C. Apthous ulcer in crohn, D. HIV esophagitis
A: Herpetic esophagitis
Answer: A: Herpetic esophagitis 
Explanation: Ans. is 'a' i.e., Herpetic esophagitis o The ulcers of herpes esophagitis can have a punctate, linear, stellate, or volcano-like appearance, often with a thin halo of edema at the margins. The ulcers may be clustered together or widely separated with normal intervening mucosa.o The most common cause of infectious esophagitis is Candida esophagitis.Valcano ulcers in esophagus are seen in Herpes simplex Esophagitiso The endoscopic appearance of early HSV esophagitis is bullae (which are rarely seen) or discrete ulcers with a yellow rim of exudate or ulcer base, the so called volcano ulcers.