Malignant neoplasm of pyloric antrum

This code signifies a primary cancerous tumor originating in the pyloric antrum, the distal-most part of the stomach before the pyloric canal. This malignancy is a type of gastric adenocarcinoma, specifically located in the region responsible for regulating stomach emptying.

Use this code when documentation clearly indicates a primary malignant neoplasm confined to or originating in the pyloric antrum. This is appropriate for confirmed diagnoses of gastric cancer specifically localized to this anatomical region, typically identified via endoscopy with biopsy and histopathological confirmation.

• Ensure the documentation specifies "pyloric antrum" and not a more general stomach location.
• Distinguish from benign neoplasms or malignancies of other stomach regions (e.g., fundus, body).
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, followed by any relevant secondary diagnoses such as metastasis or complications.