Science and Education Publishing American Journal of Medical Case Reports 2374-216X 4 4 2016 4 20 A Young Man with Cerebral Venous Thrombosis and Hyperhomocystinemia 115 117 EN Md Enayet Hussain National Institute of Neurosciences (NINS), Agargaon, Dhaka, Bangladesh Afzal Momin Mahmudul Islam Sk Rezaul Haque Sharmin Jahan Md Azharul Hoque AJMCR2016441 10.12691/ajmcr-4-4-1 2015 11 28 2016 2 12 2016 4 18 Cerebral venous sinus thrombosis is an uncommon condition and can be precipitated by various conditions. Here we report a case of cerebral venous sinus thrombosis in a young man in whom the serum homocysteine level was found to be elevated. A 36-year-old man was admitted with sudden severe headache, vomiting and visual obscuration. Investigations revealed widespread cerebral venous sinus thrombosis. All investigations to find out the etiology came out normal except the serum homocysteine level which was found to be elevated. Further studies are required to evaluate the importance of estimation of serum homocysteine level in cases of CVST, especially where a clear risk factor has not been identified and where other investigations failed to find out any known etiological factor.