Malignant neoplasm of frontal sinus

This code signifies the presence of a cancerous tumor originating in the frontal sinus, one of the paranasal sinuses located in the forehead. This malignancy can affect the bone, mucous membranes, or other tissues within this specific sinus cavity. It represents a primary malignant neoplasm, not a metastasis from another site.

Use this code when documentation explicitly states a primary malignant neoplasm of the frontal sinus. This diagnosis is typically established through biopsy and imaging studies such as CT or MRI. It is appropriate for initial diagnosis, treatment planning, and follow-up care for this specific cancer.

• Ensure documentation specifies "frontal sinus" and "malignant" to differentiate from benign lesions or malignancies of other sinus cavities.
• Do not use for secondary (metastatic) malignancies to the frontal sinus; a separate code for the primary site would be required, along with a secondary malignancy code.
• Review pathology reports carefully for definitive diagnosis and specific location within the frontal sinus.