Figure 1. A – A picture composition of the gross aspect of esophagus and adjacent organs. Note the dark appearance of esophageal mucosa and the sharp limit at the gastroesophageal junction. B – Endoscopic view of the distal esophagus. Note the darkened mucosa in every circumference of the organ. C – Microscopic aspect of the esophagus at autopsy showing superficial necrosis of the mucosa and neutrophilic inflammation (H&E 100x). Image courtesy Anatomic Pathology Service – Hospital Universitário - USP.