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Sinonasal undifferentiated carcinoma originating from inverted papilloma: A case report
Jong Seung Kim1, Ki Hwan Hong, Kyu Yun Jang
1Department of Otolaryngology-Head and Neck Surgery, Chonbuk National University Medical School Research Institute of Clinical Medicine, Chonbuk National University Departments of Pathology, Chonbuk National University Medical School and Hospital, Jeonju, Republic of Korea.
Rationale:
Sinonasal inverted papilloma (IP) is a locally aggressive tumor found in the schneiderian membrane, lining the nasal cavity and paranasal sinuses.
Patient Concerns:
We report a case of a 63-year-old woman with undifferentiated carcinoma (UC) arising in an IP in the left maxillary sinus.
Diagnoses:
The preoperative diagnosis was IP of the maxillary sinus.
Interventions:
We performed endoscopic medial maxillectomy to remove the remnant mass in the left maxillary sinus.
Outcomes:
Histological examination of the specimen revealed typical area of IP and sinonasal UC.
Lessons:
Clinicians should consider sinonasal UC in the differential diagnosis of malignancy arising in the sinonasal IP.
