title: Anti-Pr cold hemagglutination associated with livedo reticularis.
abstract: A report of anti-Pr cold hemagglutination associated with livedo reticularis is presented. Livedo reticularis is descriptive of the superficial venous system appearing when blood flow is altered in this area. Cold antibody directed against the Pr antigen of the red cell membrane can cause hemagglutination, thereby altering blood flow in cooler areas of the body. This patient had livedo reticularis approximately 8 months prior to detection of the anti-Pr cold agglutinin.
mesh_terms: D000744:Anemia, Hemolytic, Autoimmune / Q000209:etiology*; D004912:Erythrocytes / Q000276:immunology; D006801:Humans; D007519:Isoantigens / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D012867:Skin / Q000098:blood supply*; D014652:Vascular Diseases / Q000209:etiology*
chemical_list: D007519:Isoantigens