is pulmonary fibrosis hereditary
References. View image. Pulmonary fibrosis is a lung disease. The air sacs of the lungs get inflamed and are gradually replaced by scar tissue. (The air sacs are called the alveoli.) As the disease worsens, the scar tissue gets thicker and makes it harder to breathe.ulmonary fibrosis may be hereditary. There are 2 ways you can get the disease because of genes you inherited from your parents: 1  You inherit the disease and symptoms show up later in life, usually in the forties or fifties.