the observations of various degrees of degeneration of vessel wall cells due to mitochondrial disease and of irregular proliferation of reticulin fibrils in the spaces among degenerated muscle cells of the tunica media may be the evidences responsible for the tortuosity , dilatation and congestion of vessels , which eventually give rise to the vascular lesions in the brain parenchyme in mkhd .
C0162867
tunica media
C0005847
vessels