Isolated third nerve palsy: a rare neurological presentation of Burkitt's lymphoma.

Lymphoma patient presenting with isolated third nerve palsy is relatively rare, and diagnosis of underlying disease may be challenging. Until this date, less than 20 cases have been described in the literature. This is the case of a 3-year-old boy who presented to neurologist with ptosis of left eye for 8 days. On examination, abdominal mass was detected, and the child was referred to paediatric surgery department. Laparotomy and excision of the mass was done. Histopathology and immunohistochemistry of the mass confirmed it to be a case of Burkitt's lymphoma. At this point, the patient was referred to haematology department. Contrast-enhanced CT brain showed infiltration around left cavernous sinus. Patient was treated with two cycles of R-CODOX-M/R-IVAC. Ptosis improved completely within few days of starting chemotherapy. Follow-up positron emission tomography CT scan done after the second cycle of chemotherapy revealed no metabolically active disease.