A highly specific recurrent pleomorphic adenoma of the nasal septum.

A 90-year-old woman presented with the sudden onset of visual loss. She previously underwent surgery to treat a right septal pleomorphic adenoma (PA) at 77 years old. She initially presented to our hospital with severe nasal obstruction at 83 years old. A large tumor occupied the bilateral nasal cavities and, thus, surgery was performed using midfacial degloving and an endoscopic endonasal combined approach. A 60×45×43 mm tumor was completely removed; however, a small area of the tumor capsule was damaged. Six years after surgery, PA recurred in the posterior midline portion of the nasal cavity. Imaging examinations revealed a 48×42×45 mm mass, which compressed the bilateral optic canal, thereby causing severe visual loss. The recurrent tumor was endoscopically removed, and vision recovered after surgery. The lack of malignant transformation was pathologically confirmed throughout this period. The present case had several highly specific features: she was very elderly, the tumor was very large, and visual dysfunction was caused by nasal PA. We described surgical procedures in detail and considered the specific findings of the present case. En bloc resection with a sufficient margin was considered to be important in the present case because recurrence may be caused by incomplete excision.