Secondary malignant neoplasm of cerebral meninges

This code signifies the presence of cancerous cells that have spread to the cerebral meninges (the membranes surrounding the brain) from a primary tumor located elsewhere in the body. It indicates a metastatic brain tumor affecting these specific protective layers.

Apply this code when documentation confirms a secondary (metastatic) malignancy specifically involving the cerebral meninges. This is typically supported by imaging reports (e.g., MRI, CT scan) and/or pathology reports confirming metastatic disease to this site.

• Always sequence the primary malignancy code first, followed by this code for the secondary site.
• Distinguish carefully from primary brain tumors or other intracranial metastases not specifically involving the meninges.
• Ensure documentation explicitly states "cerebral meninges" or "meningeal carcinomatosis" affecting the cerebrum to support this specific code.