Registry for Advanced Sarcodiosis

Inclusion criteria * Patients with diagnosis of sarcoidosis based on ATS/WASOG criteria 22 * Age ≥ 18 years. * Life expectancy of at least 2 years. * Pulmonary function tests (spirometry) within one month of entry or willing to under pulmonary function testing on the day of study enrollment * Sarcoidosis as characterized as either advanced or non-advanced (see protocol for definition of advanced disease) * Subjects must be able to understand and be willing to sign the written informed consent form. A signed informed consent form must be appropriately obtained prior to the conduct of any trial-specific procedure. Exclusion criteria * Subjects with a medical disorder, condition, or history of such that would impair the subject's ability to participate or complete this study in the opinion of the investigator * Inability to comply with the protocol and/or not willing or not available for follow-up assessments. * Any condition which, in the investigator's opinion, makes the subject unsuitable for trial participation.