A Case of Diffuse Large B Cell Lymphoma on Maxillaly Sinus Mimicking Fibrous Dysplasia

A 38-year-old male came to outpatient clinic, presenting with a 1-month history of headache and right facial pain. There was no specific finding on nasal endoscopy. Paranasal sinuses computed tomography (PNS CT) showed unilateral soft tissue density maxillary sinus ground glass opacity zygomatic bone. And there suggestive malignancy in the subsequent PNS magnetic resonance imaging (MRI). We considered benign tumor such as fibrous dysplasia sinusitis performed endoscopic surgery combined open via Caldwell-Luc subcillary approach. Histopathological diagnosis diffuse large B-cell lymphoma. After six cycles rituximab, cyclophosphamide, doxorubicin, vincristine, prednisolone chemotherapy, he gained complete remission found recurrence until two years. report rare case sinonasal lymphoma mimicking literature review.