Malignant neoplasm of ventricles

This code signifies a primary cancerous tumor originating within the ventricles of the brain. These ventricles are fluid-filled spaces deep within the brain that produce and circulate cerebrospinal fluid. A malignant neoplasm in this location indicates an aggressive and potentially life-threatening condition.

This code is appropriate for documented cases of primary malignant brain tumors specifically identified as arising from the cerebral ventricles. It should be used when pathology reports or imaging studies confirm the ventricular origin of the malignancy.

• Ensure documentation clearly specifies the ventricles as the primary site, not just a general brain tumor.
• Distinguish from secondary (metastatic) tumors to the ventricles; this code is for primary malignancy.
• Consider additional codes for specific histological types of the neoplasm if documented.