Neoplasm of uncertain behavior of right renal pelvis

This code signifies the presence of an abnormal growth in the right renal pelvis that cannot definitively be classified as benign or malignant based on current diagnostic information. It indicates a tumor with features that are neither clearly non-cancerous nor clearly cancerous, requiring further investigation or monitoring.

Apply this code when pathology reports or imaging studies identify a lesion in the right renal pelvis with ambiguous characteristics, such as atypical cells or indeterminate growth patterns. It is appropriate when the clinician suspects a neoplastic process but lacks definitive evidence for malignancy or benignity. Documentation should clearly state "uncertain behavior" or "indeterminate neoplasm" of the right renal pelvis.

• Ensure the documentation specifically identifies the right renal pelvis; laterality is crucial for accurate coding.
• Do not use this code if the neoplasm is definitively diagnosed as benign (e.g., D30.01) or malignant (e.g., C64.1).
• Always review the final pathology report. If a definitive diagnosis is made later, update the code accordingly.