Diffuse large B-cell lymphoma in the sphenoid sinus: A case report and review of literature

Background Non-Hodgkin lymphomas (NHLs) in paranasal sinus are uncommon, accounting for 0.17-2% of all NHL cases; it is especially rare in the sphenoid sinus. In this report, we describe a case of NHL in the sphenoid sinus. Case Description A 66-year-old man presented with a sudden left eye movement disorder. His head computed tomography and gadolinium-enhanced magnetic resonance imaging (Gd-MRI) showed a mass lesion extending around the left sphenoid sinus. However, the tumor regrowth about twice was observed during 2 weeks, partial removal of tumor was performed by the endoscopic trans-nasal transsphenoidal surgery, then histologically proved it to be diffuse large B-cell lymphoma (DLBCL). After R-THP-COP regimen (rituximab 375 mg/m2,cyclophosphamide 750 mg/m2, epirubicin 50 mg/m2, vincristine 2 mg/day, and prednisolone 100 mg/day) and two courses of intrathecal methotrexate therapy for DLBCL, the symptoms and the lesion of enhanced Gd-MRI and fluorodeoxyglucose-positron emission tomography were completely disappeared. Conclusion NHLs in the sphenoid sinus is very rare disease, however, it is important to be diagnosed pathologically as soon as possible for being in remission state by the chemotherapy.