Neoplasm of uncertain behavior of pineal gland

This code signifies the presence of a tumor within the pineal gland that exhibits features making it difficult to classify as definitively benign or malignant. These neoplasms display some atypical cellular characteristics but lack clear evidence of invasion or metastasis.

This code is appropriate when pathology reports indicate a pineal gland tumor with ambiguous or borderline malignant potential. It should be used when the physician's documentation describes a "neoplasm of uncertain behavior," "atypical tumor," or "borderline tumor" specifically located in the pineal gland.

• Ensure documentation explicitly states "uncertain behavior" for the pineal gland tumor; do not use for clearly benign or malignant diagnoses.
• Distinguish from benign pineal gland neoplasms (e.g., pineal cysts) and malignant pineal gland tumors (e.g., pineoblastoma, pineocytoma with malignant features).
• Review the pathology report carefully for definitive classification before assigning this code.