Gastric cancer of unusual presentation, the importance of differential diagnosis.

We present the case of a 67-year-old male smoker with no medical history of interest. Admitted to Neurology for frontal headache, unsteady gait, temporospatial disorientation and vomiting. Laboratory tests (including vitamin B12, folic acid, lues) and cranial CT scan were normal, encephalogram compatible with diffuse encephalopathy and lumbar puncture with a finding of leptomeningeal carcinomatosis.