Surgical involvement of the maxillary sinus.
D003560:Cysts; D005402:Fistula; D005547:Foreign Bodies; D008440:Maxillary Fractures; D008441:Maxillary Neoplasms; D008443:Maxillary Sinus / Q000033:anatomy & histology* / Q000601:surgery*; D011861:Radiography, Dental; D012852:Sinusitis; D014092:Tooth Root