title: Immunoglobulin G4-related disease: a rare disease with an unusual presentation.
abstract: IgG4-RD can also present in the skeletal muscle, mimicking several other diseases. It is unusual for this relatively new classification of diseases to present in the muscles and can be mistakenly diagnosed as other autoimmune diseases rendering a delay in the appropriate management and progression of the disease.
authors.affiliation: Department of Internal medicine Division of Hematology/Bone Marrow Transplantation University of Kentucky Lexington Kentucky.
authors.forename: Muhammad Waqas
authors.initials: MW
authors.lastname: Khan
authors.affiliation: Hematology/Oncology Department Norton Healthcare Norton Cancer Institute Louisville Kentucky.
authors.forename: Terrance
authors.initials: T
authors.lastname: Hadley
authors.affiliation: Department of Hematopathology, Pathology and Laboratory Medicine University of Kentucky Lexington Kentucky.
authors.forename: Melissa
authors.initials: M
authors.lastname: Kesler
authors.affiliation: Department of Internal medicine Division of Hematology/Bone Marrow Transplantation University of Kentucky Lexington Kentucky.
authors.forename: Zartash
authors.initials: Z
authors.lastname: Gul
keywords: Fibro‐inflammatory disease; IgG4‐associated multifocal systemic fibrosis; IgG4‐positive multi‐organ lymphoproliferative syndrome; IgG4‐related disease