caudal ganglionic eminence derived interneuron obsolete caudal ganglionic eminence derived GABAergic cortical interneuron true CGE cortical interneuron caudal ganglionic eminence derived GABAergic interneuron and caudal ganglionic eminence derived interneuron are the same cell type. The two must be merged and one needs to be defined as obsolete. We decided to deprecate the entity with the more specific term and redundant qualities in the label. See comments in issue 2357. CGE gaba cortical interneuron OBSOLETE. A GABAergic cortical interneuron that develops from the caudal ganglionic eminence and has migrated to the cerebral cortex.