Neoplasm of uncertain behavior of the minor salivary glands

This code signifies a tumor originating in the minor salivary glands that exhibits characteristics making it difficult to classify as definitively benign or malignant. These neoplasms have an unpredictable biological behavior, meaning their potential for local invasion or metastasis is uncertain. Pathological examination reveals features that are neither clearly benign nor overtly malignant.

This code is appropriate for cases where a biopsy or surgical excision of a minor salivary gland tumor results in a pathology report indicating "uncertain behavior" or "borderline malignancy." It should be used when the pathologist cannot definitively classify the lesion as benign or malignant based on current diagnostic criteria. Documentation must clearly state the tumor's origin in a minor salivary gland and its uncertain behavioral classification.

• Ensure the pathology report explicitly states "uncertain behavior" for a minor salivary gland neoplasm; avoid using this code for "unknown" or "unspecified" behavior.
• Do not use this code if the tumor is definitively diagnosed as benign (e.g., pleomorphic adenoma) or malignant (e.g., mucoepidermoid carcinoma).
• Verify the anatomical site is a minor salivary gland, as major salivary gland neoplasms of uncertain behavior have different codes.