COL4A1 and congenital muscular dystrophy due to LMNA mutation: Conversely, in two cases only, the result of the histological examination was disproved by the outcome of the genetic examination: a patient with apparently mitochondrial damage in which a mutation in COL4A1 was subsequently found and one with biopsy indicative of congenital muscular dystrophy with mutation in titin gene (TTN).