Malignant neoplasm of maxillary sinus

This code signifies the presence of a cancerous tumor originating within the maxillary sinus, one of the paranasal sinuses located in the cheekbones. This malignancy can arise from various cell types, most commonly squamous cell carcinoma, and can invade surrounding structures.

Apply this code when documentation confirms a primary malignant neoplasm specifically located within the maxillary sinus. This diagnosis is typically established through biopsy and imaging studies such as CT or MRI scans. Use this code for the initial diagnosis and subsequent treatment of this specific cancer.

• Differentiate from benign neoplasms or malignancies of other paranasal sinuses.
• Ensure documentation clearly specifies "maxillary sinus" to avoid confusion with other sinus locations.
• Review pathology reports for definitive confirmation of malignancy and primary site.