Caplan's Syndrome, also known as caplan syndrome, is related to autoimmune disease and connective tissue disease. An important gene associated with Caplan's Syndrome is FAS (Fas Cell Surface Death Receptor), and among its related pathways/superpathways are TNFR1 Pathway and Death Receptor Signaling Pathway. Affiliated tissues include lung and t cells, and related phenotypes are endocrine/exocrine gland and hematopoietic system