Malignant neoplasm of fundus of stomach

This code signifies a primary cancerous tumor originating in the fundus, the dome-shaped upper part of the stomach. This malignancy involves uncontrolled growth of abnormal cells specifically within this region of the gastric anatomy.

Apply this code when documentation clearly indicates a confirmed diagnosis of adenocarcinoma or other primary malignant neoplasm located in the fundus of the stomach. This is typically supported by pathology reports from biopsy or surgical resection.

• Ensure the documentation specifies "fundus" as the tumor location; avoid using for general stomach cancer without specific site.
• Distinguish from secondary malignancies or benign neoplasms of the stomach.
• Sequence as the primary diagnosis when the malignancy is the reason for the encounter.