However, in a study of children with surgically resected mild MCD, FCD I, FCD II, or HME, VAFs of TSC1/TSC2 in those with FCD IIb cases were found to be strongly enriched in pools of dysmorphic neurons and balloon cells (up to 45%) compared with glial cells and morphologically normal neurons (down to 1.4%) [11]. The gene discussed is TSC1; the disease is fleck corneal dystrophy.