SUMMARY Print Section Listen SUMMARY Heparin-induced thrombocytopenia (HIT) is a prothrombotic complication of treatment with heparin. It is associated with mild-to-moderate thrombocytopenia, although the main clinical concern is the high…
SUMMARY Print Section Listen SUMMARY The blood coagulation system, like a powerful idling engine, is always active and generating thrombin at very low levels, poised for explosive thrombin generation. Positive…
SUMMARY Print Section Listen SUMMARY Blood vessels, especially their endothelial lining, play a critical role in the maintenance of vascular fluidity, arrest of hemorrhage (hemostasis), prevention of occlusive vascular phenomena…
SUMMARY Print Section Listen SUMMARY Each day the adult human produces approximately 1 × 1011 platelets, a level of production that can increase 10- to 20-fold in times of increased…
SUMMARY Print Section Listen SUMMARY Evaluation of a hemostatic disorder is commonly initiated when (1) a patient or referring physician suspects a bleeding tendency, (2) a bleeding tendency is discovered…
SUMMARY Print Section Listen SUMMARY The three major pathophysiologic causes of thrombocytosis are (1) clonal, including essential (or primary) thrombocythemia and other myeloproliferative neoplasms; (2) familial, including rare cases of…
Plasma Cell Disorders Tomer M. Mark, MD Geraldine P. Schechter, MD, MACP Plasma cells are terminally differentiated B cells responsible for immunoglobulin production. Plasma cell disorders represent a group of…
Lymphoproliferative Disorders Elizabeth Margolskee, MD, MPH Peter Martin, MD The diagnosis and classification of lymphoid tumors is a multistep process involving integration of clinical, morphologic, phenotypic, and molecular data. The…
Myeloproliferative Neoplasms Olga Pozdnyakova, MD, PhD Attilio Orazi, MD Myeloproliferative neoplasms (MPNs) are a group of clonal disorders of the hematopoietic stem cells that share similar features, such as hypercellular…
Acute Leukemias Julia T. Geyer, MD Sangmin Lee, MD Acute leukemias are hematologic malignancies characterized by increased numbers of myeloid or lymphoid blasts. The term “acute,” historically referring to a…
