1. Usual Interstitial Pneumonia (UIP) is the most common histologic pattern of fibrosis and has typical imaging findings on HRCT. 2. UIP is an imaging/histologic diagnosis while Idiopathic Pulmonary Fibrosis (IPF) is a multidisciplinary diagnosis. 3. While most patients with UIP pattern of fibrosis are diagnosed with IPF, this imaging pattern can be seen in other settings such as connective tissue related disease, hypersensitivity pneumonitis, asbestosis, vasculitis, familial pulmonary fibrosis, and drug reaction

1. Distinguish UIP from IPF 2. Review histologic and imaging patterns of UIP; review updated 2022 ATS criteria diagnosis for IPF. 3. Explore the differential diagnosis for UIP and associated imaging findings including IPF, connective tissue disease, hypersensitivity pneumonitis, asbestosis, vasculitis, familial pulmonary fibrosis, and drug reaction. 4. Present multidisciplinary approach to UIP including the clinical presentations and serologic markers that can aid the radiologist.