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Cryofibrinogen-Associated Glomerulonephritis.

Am J Kidney Dis

February 2017

Division of Anatomic Pathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN. Electronic address:

Cryofibrinogen is an under-recognized cryoprotein. Cryofibrinogen is a cryoprecipitate that develops following plasma refrigeration, but does not occur in cold serum. People with cryofibrinogenemia may be asymptomatic, but this cryoprotein can be associated with thromboembolic disease, particularly affecting the skin.

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Cryofibrinogenemia is an uncommon cause of intravascular coagulation necrosis of the skin and occurs as a result of vascular occlusion from cryoproteins, which reversibly precipitate in cold temperatures. The disease is associated with various conditions, most commonly neoplastic and thromboembolic diseases, and produces cutaneous manifestations such as purpura, ecchymoses, gangrene, and ulcerations. Diagnosis is based on clinical cutaneous manifestations, histopathology, and the laboratory detection of cryofibrinogen precipitation.

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Platelet satellitism (PS), the in vitro phenomenon of platelets rosetting about nonlymphocytic leukocytes, is an uncommon and poorly understood finding reported in the ethylenediaminetetra-acetic acid (EDTA)-anticoagulated blood of patients with a wide variety of clinical conditions. This report presents experimental studies investigating the nature of this phenomenon by utilizing the blood of patients with platelet satellitism. Wet preparation studies and electron microscopy (transmission and scanning) demonstrated the morphologic sequences involved in the phenomenon, including eventual phagocytosis of platelets by neutrophils.

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