title: Lymphocytic thrombophilic arteritis: a newly described medium-sized vessel arteritis of the skin.
abstract: BACKGROUND
  We encountered a distinct arteriolar histopathologic finding of lymphocytic vasculitis associated with a hyalinized fibrin ring in vessel lumina. Identical histologic findings have previously been described as macular arteritis.
  
  
  METHODS
  We describe 5 women (mean age, 25 years; age range, 20-34 years) with persistent, slowly progressive, patchy and reticular hyperpigmentation associated with livedo racemosa affecting predominantly the lower limbs. In the biopsy samples, infiltration of muscular vessel wall by inflammatory cells, affecting small arteries of the dermosubcutaneous junction or superficial subcutis, was present. Of the infiltrate, 90% or more consisted of mononuclear cells, mainly lymphocytes with an admixture of histiocytes. Neutrophils and eosinophils were absent or scant. Inflammation was confined to the vicinity of the vessel and the immediate surrounding panniculus. A concentric fibrin ring involving the entire periphery of the lumina of affected vessels was present in all the patients. Laboratory investigation results revealed that 4 patients had antiphospholipid antibodies in their serum. One of these patients had a heterozygous mutation of the factor V Leiden gene. Conclusion We term this arteritis lymphocytic thrombophilic arteritis to reflect the histologic features that combine lymphocytic vascular inflammation with changes representing a thrombophilic endovasculitis.
authors.affiliation: Skin and Cancer Foundation Australia, Sydney, New South Wales, Australia. joycelee@nsc.gov.sg
authors.forename: Joyce Siong-See
authors.initials: JS
authors.lastname: Lee
authors.forename: Steven
authors.initials: S
authors.lastname: Kossard
authors.forename: Michael A
authors.initials: MA
authors.lastname: McGrath
mesh_terms: D000328:Adult; D017152:Antibodies, Antiphospholipid / Q000097:blood; D001167:Arteritis / Q000150:complications* / Q000276:immunology / Q000378:metabolism / Q000473:pathology*; D005165:Factor V / Q000235:genetics; D005260:Female; D005337:Fibrin / Q000378:metabolism; D006579:Heterozygote; D006801:Humans; D007150:Immunohistochemistry; D007866:Leg; D008214:Lymphocytes / Q000473:pathology*; D009154:Mutation; D010859:Pigmentation Disorders / Q000150:complications / Q000473:pathology; D012867:Skin / Q000098:blood supply*; D012871:Skin Diseases / Q000150:complications / Q000473:pathology; D019851:Thrombophilia / Q000150:complications* / Q000235:genetics
chemical_list: D017152:Antibodies, Antiphospholipid; C095381:factor V Leiden; D005165:Factor V; D005337:Fibrin