Primary Non-Hodgkin Lymphoma of Sphenoid Sinus Involving Cavernus Sinus and Clivus with Isolated 3rd Nerve Palsy.

Lymphomas are group of malignant neoplasm having origins from lymphoreticular cells. B cell Non Hodgkin Lymphoma (BNHL) of sphenoid sinus as primary site for lymphomas are very rare and whenever involves comes usually with ocular manifestations. The proximity of the lesion to optic nerve and cavernous sinus present a high risk of developing unilateral ophthalmoplegia or even blindness. The vast majority of cases of localized sphenoid sinus lymphomas are usually curable to surgery, chemotherapy alone or combination of both, sometimes radiotherapy. Here we report a case of 58 years old male attended at Bangabandhu Sheikh Mujib Medical University (BSMMU) on 9th February 2017 at 9:00 AM having headache and gradually developing ptosis in left eye over 15 days. MRI of brain revealed homogeneously enhancing lesion occupying sphenoid sinus, clivus extending towards left cavernous sinus. Gross total resection of tumor was achieved by endoscopic endonasal approach. Histopathology revealed non-Hodgkin lymphoma and immunohistochemically it was positive for CD 20, CD 45, CD 79 and BCL 2, strongly compatible with diffuse large B cell lymphoma. Treatment with R-CHOP regimen following surgery resulted in initiation of improvement of the condition of the patient. Primary B cell Non-Hodgkin Lymphoma (PBNHL) of the sphenoid sinus is a rare entity which can be perplexing and misleading for a surgeon until the histopathological proof is in hand. Early diagnosis with strong suspicion of sphenoid lymphoma in mind during workouts and timely management, close monitoring and follow ups have high potential for cure and longer disease-free survival of the BNHL patients.