MTOR and fleck corneal dystrophy: Genetic analysis demonstrated that the same variants in TSC1 [c.64C>T (p.Arg22Trp)] and in MTOR [c.4376C>A (p.Ala1459Asp), c.4379 T>C (p.Leu1460Pro), c.6644C>T (p.Ser2215Phe), c.6644C>A (p.Ser2215Tyr), c.5930C>A (p.Thr1977Lys)] genes, with similar degrees of brain mosaicism, gave rise to both FCD phenotypes (IIa and IIb), suggesting that the two subtypes represent a gradient of the same disorder, therefore challenging the current classification (Lim et al., 2017; Baldassari et al., 2019b).