CPT® Code 31075

A unilateral frontal sinusotomy is a surgical procedure that involves accessing the frontal sinus through a transorbital approach, which means the surgery is performed through the orbit of the eye. This procedure is specifically indicated for the removal of a mucocele, osteoma, or other mass lesions that may be present in the frontal sinus. The term "Lynch-type procedure" refers to the specific technique used in this surgery, which is characterized by a precise incision made just below the eyebrow on the side of the affected sinus. This approach allows for direct access to the frontal sinus while minimizing damage to surrounding tissues. The procedure involves several critical steps, including the elevation of soft tissues, the use of specialized instruments to cut through the bone, and the careful removal of the lesion. After the lesion is excised, the bone flap is replaced and secured, followed by layered closure of the soft tissues and skin. This detailed approach ensures that the underlying structures are preserved as much as possible while effectively addressing the pathological condition within the frontal sinus.