Oxaliplatin is a platinum compound used in patients with gastrointestinal malignancies. It is known to evoke a drug-induced immune-mediated thrombocytopenia, which has not been reported in Korea. We describe a 53-year-old man who developed oxaliplatin-induced immune-mediated thrombocytopenia during chemotherapy for colon cancer. Oxaliplatin-dependent IgG platelet antibodies were detected in his...

Thrombocytopenia frequently complicates malarial infections but the mechanism has not been elucidated. We studied 28 patients with malarial infections and noted that 16 of 17 thrombocytopenic patients had elevated levels of platelet-associated IgG (PAIgG). In all thrombocytopenic patients studied, the level of PAIgG returned to normal as the platelet count rose to normal levels. To study the me...

Heparin-induced thrombocytopenia is a rare immune-mediated complication of heparin therapy, characterized by decrease in platelet count more than 50% the baseline. Typically occurs between 5 to 10 days after initiation heparin. Incidence United States ranges from 0.2% 3.0%, depending on population studied and diagnostic criteria used. HIT has been categorized into two types: type I II. While be...

891 I 1949, Ackroyd reported the abrupt onset of severe thrombocytopenia and purpura in patients receiving the sedative allylisopropylacetylcarbamide (Sedormid).1 All the patients had taken Sedormid previously and had become sensitized to it. Today, this classic picture of drug-induced, immunemediated thrombocytopenia is most often caused by quinine in outpatients and by vancomycin in hospitali...

Background Checkpoint blocking agents such as pembrolizumab or nivolumab may induce a diversity of mostly autoimmune-mediated side effects. These autoimmune phenomena mainly affect ductless glands such as the pituitary gland (hypophysitis), the thyroid gland (thyreoiditis), the skin (vitiligo and rash), the colon (colitis), and the lung (pneumonitis). Furthermore, many other organs or organ sys...

In humans, the Fc receptor for IgG, FcgammaRIIA, is expressed on macrophages and platelets and may play an important role in the pathophysiology of immune-mediated thrombocytopenia. Mice lack the genetic equivalent of human FcgammaRIIA. To better understand the role of FcgammaRIIA in vivo, FcgammaRIIA transgenic mice were generated and characterized. One transgenic mouse line expressed FcgammaR...