Neoplasm of uncertain behavior of uterus

This code signifies a uterine growth that pathologists have identified as having an uncertain potential for malignancy. It indicates that while the lesion is not definitively benign or malignant, its biological behavior cannot be predicted with certainty based on current microscopic examination. This diagnosis often necessitates further investigation or close monitoring.

Use this code when pathology reports describe a uterine neoplasm as "uncertain behavior," "borderline," or "of unknown malignant potential." It is appropriate when the pathologist cannot definitively classify the tumor as benign or malignant after microscopic examination of tissue. Documentation must clearly state the uncertain nature of the uterine lesion.

• Do not use this code if the pathology definitively states benign (e.g., leiomyoma) or malignant (e.g., adenocarcinoma).
• Always review the final pathology report; preliminary reports may be less definitive.
• Sequence this code as a primary diagnosis when the neoplasm of uncertain behavior is the reason for the encounter.