MYBL1 and cerebral cortical dysplasia: Furthermore, CD34, an intercellular adhesion protein transiently expressed in early neural development, which is diffusely expressed in PLNTY, is known to be frequently positive in cortical dysplasia, especially in type IIb that tends to show transmantle signs, and also partially positive in other LEATs besides MYB- or MYBL1-altered pLGGs [39, 51].