Purpose: To evaluate types of gray matter heterotopias, associated brain anomalies, and its correlation withthe patterns of seizure. Materials and Methods: We evaluated retrospectively 19 patients( male:female= 10:9, meanage 21 years) with gray matter heterotopias on brain MRI. Using 1.0T superconducting MR unit, spin echo T1-,proton-density- and T2-weighted images in axial, coronal and sagittal planes were obtained. Results: Types of graymatter heterotopias were single subependymal in four patients, multiple subependymal in one, focal subcortical ineight, diffuse subcortical in two, mixed multiple subependymal and focal subcortical in four. Associated anomalieswere seen in 11 patients:other neuronal migration anomalies in eight patients, corpus callosum agenesis in two,and combined holoprosencephaly and Dandy-Walker malformation in one. Fifteen patients had seizure. The patterns ofseizure were not correlated with the types of heterotopias. Conclusion: In addition to subependymal, focalsubcortical, and diffuse subcortical types, gray matter heterotopias included mixed variant of of multiplesubependymal and subcortical type. Schizencephaly was the most common form of accompanying anomalies, and patternsof seizure were not correlated with types of gray matter heterotopias, even though main clinical menifestation wasseizure.