RT Book, Section A1 Stone, John H. A2 Imboden, John B. A2 Hellmann, David B. A2 Stone, John H. SR Print(0) ID 57273528 T1 Chapter 37. Hypersensitivity Vasculitis T2 CURRENT Diagnosis & Treatment: Rheumatology, 3e YR 2013 FD 2013 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-163805-0 LK accessmedicine.mhmedical.com/content.aspx?aid=57273528 RD 2024/04/25 AB Small-vessel vasculitis of the skin, often accompanied by little or no apparent involvement of other organs.Known by a variety of other names, including cutaneous leukocytoclastic angiitis.Precipitants such as medications and infections are often identifiable, but approximately 40% of cases have no definable cause.Primary forms of vasculitis such as Henoch-Schönlein purpura, microscopic polyangiitis, and granulomatosis with polyangiitis (formerly Wegener granulomatosis) must be excluded. Similarly, well-recognized forms of secondary vasculitis such as mixed cryoglobulinemia caused by hepatitis C must also be eliminated from the differential diagnosis.Most cases are self-limited if the precipitant can be identified and removed. Glucocorticoids or other medications are required in other cases.