What is Pulmonary Fibrosis?

Pulmonary fibrosis (PF) is a family of more than 200 interstitial lung disease (ILDs) that cause inflammation and/or scarring of the lungs.

About 30,000 Canadians live with PF. Approximately half of this group of people have Idiopathic Pulmonary Fibrosis (IPF), meaning the cause is uncertain or unknown.

Understanding Pulmonary Fibrosis

interstitial lung disease
The interstitium is the part of the lung that holds all of the structures together like scaffolding on a building.
Idiopathic Pulmonary Fibrosis is a family of interstitial lung diseases
If we zoom in, we can see the airways. At the end of these airways are air sacks called alveoli.
Idiopathic Pulmonary Fibrosis is a family of more than 200 interstitial lung disease
In healthy lungs, the oxygen that you breathe in goes into the air sacks, crosses the interstitium and diffuses into your blood vessels to deliver oxygen to your body.
interstitial lung disease
Carbon dioxide – our waste gas – diffuses out of the blood into the alveoli, and we breath it out.
interstitial lung disease
Oxygen needs to cross the interstitium to get into the blood stream.
interstitial lung disease
When you have pulmonary fibrosis there is usually inflammation and scarring of this interstitium. It becomes thickened and impairs the flow of oxygen into the body.

What causes pulmonary fibrosis?

Pinpointing the cause an individual case of PF can be challenging. Known causes include: occupational exposures to asbestos and inorganic dusts, organic compounds (mold, bacteria…) some medications, autoimmune diseases such as scleroderma or rheumatoid arthritis, chemo or radiation therapy. Smoking is not a cause, but it is a known risk factor. Often, there is no identifiable cause.

Idiopathic Pulmonary Fibrosis is a family of more than 200 interstitial lung disease
Idiopathic Pulmonary Fibrosis is a family of more than 200 interstitial lung disease

What are the symptoms of PF?

Generally, a feeling of shortness of breath or breathlessness upon exertion is an early sign of pulmonary fibrosis, sometimes accompanied by a persistent cough. Because symptoms can develop very gradually, it can take years before other common respiratory problems can be ruled out.

What to expect as PF progresses

Pulmonary fibrosis is a chronic disease. It behaves differently for each individual. However, one can typically expect that once the fibrosis scars the lung, that piece of the lung is permanently damaged. Ultimately many people with the disease become candidates for a lung transplant. Medication, good nutrition and exercise and emotional support can go a long way towards improving the quality of life of people living with the disease.

More on What is Pulmonary Fibrosis

CPFF Presents Documentary

CPFF Documentary – Breathless for Change

This documentary explores the courage and resilience of people living with PF and uncovers the barriers to accessing equitable healthcare for treatment and disease management.


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Frequently Asked Questions

“That’s an excellent question!” – You will hear this a lot. Do not get frustrated, it’s not your doctor’s fault if he or she does not have the answers. Through fundraising and support, advances in research will help answer those questions.

What causes Pulmonary Fibrosis?

What are the symptoms of PF?

What are key indicators for concern?

What is the prognosis?

Should I maintain an active lifestyle?

Can I travel?

What about alternative medicines?

What can I do to help myself?

How can I help someone who is suffering from PF?

What can I do to protect myself from the smoke and haze of wildfires?


#PFQA – Pulmonary Fibrosis Online Question & Answer with a Panel of Experts

Questions and Answers from an online panel of experts hosted by CPFF and Ward Health.

Panel of Expert Respondents

Dr. Martin Kolb: Dr. Kolb, Associate Professor of Pathology and Molecular Medicine at McMaster University, and Director of The Firestone Institute for Respiratory Health at St. Joseph’s Healthcare in Hamilton Canada.

Professor David G Taylor: David Taylor is Professor Emeritus of Global Health and Pharmaceutical Policy at UCL London, UK. Read Professor Taylor’s article “Pulmonary Fibrosis – Care for Patients, Benefit all.”

Robert Davidson: Robert Davidson is President and Founder of the Canadian Pulmonary Fibrosis Foundation, a registered charity dedicated to providing education and support for people affected by pulmonary fibrosis.

How can someone with PF exercise when it is difficult to breathe?

Because autopsies find 97% of patients with Simion HPV, should IPF patients not be on anti-virals?

I do a tremendous amount of coughing, from the time I get up until I go to bed. Is this common? My mother and my sister had this and they did not cough like I do.

Is the risk of developing IPF increasing?

Does pulmonary fibrosis only affect people when they get older?

I have been offered an opportunity to enter a clinical trial. Are there risks? What happens if my symptoms get worse?

Can societies across the world afford better therapies for disorders like pulmonary fibrosis?

Crackles or velcro sounds, are these unique to IPF or even to PF? Are they suggestive of other conditions? If not a sound associated with COPD, then this should be further information for the doctor that the patient doesn’t have COPD?

I have been told that I should be referred to an ILD (Interstitial Lung Disease) unit to confirm the diagnosis and find out what treatments and trials might be available. Is this necessary?

How does NSIP differ from IPF? Any studies going on for NSIP? Do I need biopsy for definite diagnosis? What is prognosis?

Can new treatments cure pulmonary fibrosis?

What treatment options are currently available, or in development, for PF?

My GP believes I have IPF and is referring me to a respirologist. What is involved in the full diagnosis? I have heard that a lung biopsy may be done. Is that dangerous as it may cause more scarring?

Why is there so little known about PF?

What is Pulmonary Fibrosis and what causes it?