Malignant neoplasm of pyloric antrum

This code identifies a primary cancerous tumor located specifically in the pyloric antrum, the distal-most part of the stomach before the pyloric sphincter. This malignancy originates from the gastric mucosa and can be of various histological types, most commonly adenocarcinoma.

Apply this code when documentation confirms a primary malignant neoplasm confined to or originating from the pyloric antrum. This is typically supported by pathology reports from biopsy or surgical resection, along with imaging studies and endoscopic findings. Use for initial diagnosis, treatment, and follow-up care of this specific gastric cancer.

• Differentiate from other stomach regions; documentation must explicitly state "pyloric antrum."
• Do not use for secondary (metastatic) malignancies to the pyloric antrum; use codes for secondary malignant neoplasms.
• Consider sequencing with codes for associated symptoms, complications, or treatment modalities (e.g., chemotherapy, radiation therapy).