COL4A3 and kidney disorder: In the patient with typical extrarenal features and GBM lamellation (index of family 11), whole exome sequencing using a kidney disorders gene panel identified COL4A4 variant c.2690G>A (p.Gly897Glu), but no additional variants in COL4A3/COL4A4/COL4A5 or other podocyte-related genes.