English: What is idiopathic pulmonary fibrosis (IPF)? Idiopathic pulmonary fibrosis is where the lungs undergo scarring and fibrosis for some unknown reason.

Sources:

1. Wikipedia.org 2. Medscape.com http://emedicine.medscape.com/article/301760-workup#showall

* Good images (Creative Common) 

http://emedicine.medscape.com/article/301226-overview 3. Le, T., Bhushan, V.S., Scochat, M., Kalani, M., Chavda, Y., Kallianos, K., Deng, F., Sylvester, P. (2016). First Aid for the USMLE Step 1 2016. McGraw Hill Education. 4. Sattar, H.A.(2017). Fundamentals of Pathology (2017 ed.). 5. Goljan, E. (2010). Rapid Review Pathology (3rd ed.). Philadelphia: Mosby Elsevier 6. UpToDate 7. Tortora G.J., Derrickson B. (2014). Principles of Anatomy & Physiology. (14th edition). Hoboken:Wiley 8. Kumar V., Abbas A.K., Fausto N., Aster J.C. (2010). Robbins and Cotran Pathologic Basis of Disease (8th edition). Philadelphia:Saunders. 9. Ross M.H., Pawlina W. (2011). Histology: A Text and Atlas (6th edition). Philadelphia: Lippincott Williams & Wilkins. 10. Costanzo L. (2018). Physiology (6th edition). Philadelphia: Mosby Elsevier 11. Kage H., Borok Z. (2014). EMT and Interstitial Lung Disease: A Mysterious Relationship. Curr Opin Pulm Med, 18(5); 517-523.

12. Jolly M.K., Ward C., Eapen M.S., Myers S., Hallgren O., Levine H., Sohal S.S. (2017). Epithelial Mesenchymal Transition (EMT), a Spectrum of States; Role in Lung Development, Hemostasis and Disease. Dev Dyn, [in press]