Neoplasm of uncertain behavior of left ovary

This code signifies a tumor of the left ovary that cannot be definitively classified as benign or malignant based on current pathological examination. The cellular characteristics suggest a neoplastic process, but there is insufficient evidence to determine its aggressive potential.

Assign this code when pathology reports indicate an ovarian mass with features that are neither clearly benign nor clearly malignant, specifically located in the left ovary. This diagnosis is often provisional, pending further diagnostic workup or definitive surgical pathology. Documentation should explicitly state "uncertain behavior" or "borderline" for a left ovarian neoplasm.

• Ensure the laterality (left ovary) is clearly documented; do not use this code for bilateral or unspecified ovarian involvement.
• Distinguish carefully from benign ovarian neoplasms (D27.-) and malignant ovarian neoplasms (C56.-).
• This code is typically used when the pathologist cannot provide a definitive benign or malignant diagnosis.