Focal cortical dysplasia type I Focal cortical dysplasia type Ib 2018-09-16T11:05:32Z true true FCD Type I refers to isolated lesions, which present either as radial (FCD Type Ia) or tangential (FCD Type Ib) dyslamination of the cortex, that may be identified in one or multiple lobes of the brain. http://www.case.edu/EpSO.owl#FocalCorticalDysplasiaTypeIB https://www.ncbi.nlm.nih.gov/pubmed/31085954 A subtype of focal cortical dysplasia type I that is characterized by abnormal tangential cortical lamination. peter FCD Type IB (Abnormal Tangential Cortical Lamination)