Neoplasm of uncertain behavior of pituitary gland

This code signifies a pituitary gland tumor whose biological behavior cannot be definitively classified as benign or malignant based on current pathological examination. It represents an intermediate category where the neoplastic cells exhibit some atypical features but lack clear evidence of invasion or metastasis.

Use this code when pathology reports describe a pituitary lesion as "atypical adenoma," "tumor of uncertain malignant potential," or "neoplasm of uncertain behavior." It is appropriate when the pathologist cannot definitively rule out malignancy but also cannot confirm it. Documentation should clearly state the uncertain nature of the tumor.

• Do not use this code if the pathology definitively states benign (e.g., pituitary adenoma) or malignant (e.g., pituitary carcinoma).
• Ensure the documentation explicitly uses terms like "uncertain behavior," "atypical," or "indeterminate" regarding the tumor's nature.
• Code D35.2 (Benign neoplasm of pituitary gland) is often confused; differentiate based on the pathologist's specific wording regarding behavior.