Neoplasm of uncertain behavior of pleura

This code signifies a growth within the pleura, the membranes lining the lungs and chest cavity, where the biological behavior (benign vs. malignant) cannot be definitively determined from current pathological or clinical findings. It indicates that the tumor cells exhibit some atypical features but do not meet the full criteria for malignancy.

Use this code when pathology reports describe a pleural lesion as "atypical," "borderline," or "of uncertain malignant potential." This diagnosis is typically made after biopsy or surgical excision, and the pathologist is unable to classify it as unequivocally benign or malignant. Documentation must clearly state the uncertain nature of the neoplasm.

• Do not use this code if the neoplasm is definitively diagnosed as benign (e.g., pleural fibroma) or malignant (e.g., mesothelioma).
• Ensure the documentation explicitly states "uncertain behavior" or similar terminology; avoid assuming uncertainty.
• Consider sequencing this code as the primary diagnosis if it is the reason for the encounter, followed by any associated symptoms or conditions.