In this episode a “live” explanation about familial pulmonary fibrosis (FPF) or familial interstitial pneumonia (FIP). Familial cases of lung scarring can be caused by variants in something called telomere-related genes. Telomeres are repetitive sequences of DNA at the end of chromosomes which protect the DNA during cell division. Chromosomes are structures in the nuclei of cells which contain the DNA in a tightly packed form. Familial pulmonary fibrosis can appear at the same time as other conditions (not related to the lungs) which also share a telomere-related issue.