These interactive cases provide an opportunity for analyzing and evaluating actual patient scenarios. Cases outline the patient history, specific information on pulmonary disease progression, and are supplemented with radiographs, PFTs, serology, and biopsy results. Luca Richeldi, MD, PhD and Alison G. Wilcox, MD, FSCCT consider the case of a Colorado woman with an active lifestyle. How does the multidisciplinary team arrive at a diagnosis?