What color change is observed in stomach mucosa after nitric acid poisoning?

In cases of nitric acid poisoning, a significant change occurs in the stomach mucosa, which can manifest as a yellow discoloration. This color change is primarily due to the corrosive nature of nitric acid, which causes protein denaturation and subsequent tissue damage. The nitric acid has a strong oxidizing effect, leading to the formation of various compounds, including nitrous oxides, which can further contribute to the yellow appearance.

The yellow coloration signifies the presence of necrotic tissue and indicates the severity of the injury to the gastric lining. Recognizing this color change is essential in a forensic context, as it aids in identifying the cause of death or injury and understanding the circumstances surrounding the poisoning incident.

Other color changes, such as black, brown, or green, are not typically associated with nitric acid poisoning in the context of stomach mucosa. Black could indicate other types of necrosis or the presence of certain substances, while brown and green are not characteristic responses to corrosion by nitric acid.