This month, Peguy Saad, M.D., and Peter Barland, M.D., discuss
cells. It is also known for its dramatic response to steroids.
The recent identification of IgG4 in the affected tissues of many chronic inflammatory syndromes has led to the recognition of a new clinicopathological entity — IgG4 RSS. Prior to the discovery of IgG4 RSS as a multiorgan disorder, many…