Neoplasm of uncertain behavior of spinal meninges

This code signifies a tumor originating in the membranes surrounding the spinal cord (meninges) that cannot be definitively classified as benign or malignant based on current pathological examination. It represents an intermediate category where the biological behavior of the neoplasm is uncertain.

Apply this code when pathology reports indicate a spinal meningeal tumor with features that are neither clearly benign nor clearly malignant, often described as "atypical" or "borderline." This is typically used following biopsy or surgical excision when the pathologist cannot provide a definitive benign or malignant diagnosis.

• Ensure the pathology report explicitly states "uncertain behavior" or similar terminology for a spinal meningeal neoplasm.
• Do not use this code if the tumor is definitively diagnosed as benign (e.g., meningioma) or malignant (e.g., anaplastic meningioma).
• Always review the complete pathology report for the most specific diagnosis; if a more definitive diagnosis is later established, update the code accordingly.