Hema Flashcards
Diagnostic test for PNH
Flow cytometry
Markers absent on erythrocytes in patients with PNH
CD55 and CD59
Virus that causes chronic pure red cell aplasia in patients with AIDS and transient transient aplastic crisis in patients with sickle cell disease
Parvovirus B19
Treatment for PNH that reduces intravascular hemolysis, hemoglobinuria, and the need for transfusion
Eculizumab
First-line therapy in young patients with aplastic anemia (less than 40 years)
HSCT
Treatment for patients with AIDS and chronic parvovirus B19 infection
IV immune globulin
Most frequent cause of normocytic anemia
Inflammatory anemia
Serum ferritin level that rules out iron deficiency, even with inflammation
More than 100 ng/mL
Percentage of patients with iron deficiency with normal MCV
33%
Most common cause of microcytic anemia
Iron deficiency
First morphologic sign of iron deficiency
Hypochromia (decreased MCHC)
Most useful test in the diagnosis of iron deficiency
Serum ferritin
Standard treatment (and duration) for iron deficiency
Oral iron for 6 months
Homocysteine and methylmalonic acid levels in vitamin B12 deficiency
Both increased
Homocysteine and methylmalonic acid levels in folate deficiency
Elevated homocysteine, normal methylmalonic acid
Initial therapy for warm-antibody and cold agglutinin autoimmune hemolytic anemia
Corticosteroids
First-line therapy for hereditary spherocytosis and transfusion-dependent thalassemias
Splenectomy
Standard treatment for severe thalassemia and severe PNH
Stem cell transplantation
Supplement needed by all patients with hemolytic anemia
Folic acid
Best time to test for enzyme concentrations in G6PD deficiency
2-3 months after a hemolytic event
Diagnostic test for sickle cell syndromes
Hemoglobin electrophoresis
Transfusion target in sickle cell disease to avoid hyperviscosity
Hemoglobin less than 10 g/dL
Hemoglobin seen in alpha-thalassemia with three-gene deletion
Hemoglobin H (4 beta)
Hemoglobin seen in alpha-thalassemia with four-gene deletion resulting in hydrops fetalis
Hemoglobin Bart’s
Also known as Cooley anemia
Beta-thalassemia major
Drug-induced ITP is most often linked to these drugs
Quinine or quinidine
First-line therapy for ITP
Corticosteroids
Thrombopoiesis-stimulating agents used in refractory cases of ITP
Eltrombopag, romiplostim
Most common cause of thrombocytopenia in a pregnant patient
Gestational thrombocytopenia
Treatment for TTP
Plasma exchange
Gold standard for diagnosis of HIT
Serotonin release assay
Hallmark of primary hemostasis failure
Mucocutaneous bleeding (epistaxis, gingival bleeding, easy bruising, menorrhagia)
Treatment for intracranial bleeding due to excessive warfarin administration
Recombinant human factor VIIa or prothrombin complex concentrate
Most common inherited bleeding disorder
von Willebrand disease
Treatment for vWD with mild to moderate bleeding or before minor invasive procedures
DDAVP
Transfusion reaction diagnosed by an assay for antibodies to human platelet antigen-1a
Posttransfusion purpura
Treatment for posttransfusion purpura
IV immune globulin
Prevention for transfusion-associated GVHD
Gamma irradiation of cellular blood components
Most common defects leading to thrombophilia (2)
Factor V Leiden and prothrombin gene mutations
Most common hereditary thrombophilia in white populations
Factor V Leiden mutation
Most common acquired thrombophilia
Antiphospholipid syndrome
Most common malignant plasma cell dyscrasia
Multiple myeloma
Presence of hepatomegaly in multiple myeloma should prompt evaluation for this condition
Amyloidosis
Preferred pretransplant induction chemotherapeutic regimen for multiple myeloma
Dexamethasone plus lenalidomide (or thalidomide)
Treatment for multiple myeloma in patients who are not transplant candidates
Melphalan and prednisone
Vaccine indicated for multiple myeloma patients treated with bortezomib
Varicella-zoster vaccine
Drug to be avoided in multiple myeloma patients who are candidates for stem cell transplantation
Melphalan
Most common myeloproliferative disorder
Essential thrombocythemia
Treatment for erythromelalgia in patients with essential thrombocythemia
Low-dose aspirin
Patients with essential thrombocythemia who do not require therapy
Age less than 60, asymptomatic, and platelet less than 1.5 million
Tests to distinguish polycythemia vera from secondary erythrocytosis (2)
JAK2 mutation, low erythropoietin
Hematocrit levels to diagnose polycythemia vera
Men >60%, women >56%
Treatment of choice for patients with polycythemia vera and at high risk for thrombosis (2)
Hydroxyurea and phlebotomy
Goal hematocrit in therapeutic phlebotomy for polycythemia vera
Less than 42% in women, less than 45% in men
Intervention contraindicated in myelofibrosis with myeloid metaplasia because it does not improve mortality and increases risk of progression to leukemia
Splenectomy
Treatment for myelofibrosis with myeloid metaplasia in patients less than 60 years
Allogeneic stem cell transplantation
Specific treatment for 5q-syndrome subtype of MDS
Lenalidomide
Most common leukemia encountered in adults
Chronic lymphocytic leukemia
An aggressive relapse of CLL with B symptoms, massive lymphadenopathy, and hepatosplenomegaly
Richter transformation
Single drug treatment for stage III or IV CLL in older patients
Chlorambucil
Markers detected on flow cytometry in hairy cell leukemia
CD11 and CD103
Treatment for hairy cell leukemia
Cladribine (purine analog)
Of all the leukemias, this will most likely involve significant thrombocytopenia with bleeding, bruising, petechiae, and infection
AML
Physical examination findings that suggest an alternative or concomitant diagnosis other than AML
Lymphadenopathy and hepatosplenomegaly
Blood smear findings pathognomonic of AML
Auer rods
Three cytogenetic abnormalities that carry a good prognosis
t(8;21), t(15;17), inv(16)
Percentage of bone marrow blasts to confirm a diagnosis of AML
More than 20%
Treatment for acute promyelocytic leukemia
ATRA
Drug combination that can induce higher remission rates in AML
Cytatabine and an anthracycline (daunorubicin or idarubicin)
Drug used to induce remission in relapsed older adult patients with CD33+ AML
Gemtuzumab ozogamicin
Treatment for retinoic acid syndrome
Dexamethasone