GJB2 and nodular sclerosis classical Hodgkin lymphoma: To identify the genetic cause of NSHL in this proband, we routinely applied a Sanger sequencing of four common HL-associated genes, including gap junction protein beta-2 (GJB2), gap junction protein beta-3 (GJB3), solute carrier family 26 member 4 (SLC26A4) and mitochondrially encoded 12S RNA (MT-RNR1).