<s>[INST] Hi Doctor, my mother-in-law has been diagnosed with Pulmonary Fibrosis. It has taken the physicians months to figure out what is wrong, she is on oxygen almost 24/, very short of breath & major weight loss. She just started treatment of Prednesone.  Mayo has indicated from her biopsies and labs they do not know the cause.  I know this is a progressive disease and not curable. Can you tell me from you persepective what her life expectany is? She is 77 years. [/INST] Yes, pulmonary fibrosis is a progressive disease, and no specific treatment is available for the same.  The life expectancy depends on the degree of lung involved, and the amount of normal lung left and the quantification of pulmonary hypertension .  Also, acute deterioration due to supper added infection, may start a downhill course.  In general healthy population who have no other Co existing health issues.  The life span is 3-5 years.  However, considering her age and if any other Co existing condition it can be even less.  Continue oxygen, SOS BiPAP.  May try tab perferidone and treatment of pulmonary hypertension for symptomatic relief.  Regards Chat Doctor.  </s>