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Heme/Onc Exam 1 Terms and Tests
Terms and Tests for Heme/Onc Exam 1
75
Medical
Professional
08/27/2011

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Term
Single-Tandem Repeats (STRs)
Definition
variable lengths of repeats, diversed/polymorphic due to mistakes in DNA polymerase, MSI when tumors have different repeat lengths than normal, PCR used to identify microsatellite instability
Term
MSI-low
Definition
1/5 markers tested positive for STRs
Term
MSI-high
Definition
2+/5 markers tested positive for STRs
Term
MMRp testing
Definition
IHC antibodies against mutated proteins, loss of staining indicates mutation, MLH1/MSH2 in Lynch Syndrome, test family members if positive
Term
HC2 HPV DNA Test
Definition
liquid-phase hybridization with high and low-risk probes
Term
Anatomical pathology
Definition
autopsy, surgical pathology, cytopathology
Term
Clinical pathology
Definition
hematology, microbiology, immunology, flow cytometry, chemistry
Term
Receiver operating curve (ROC)
Definition
plot of TPR versus FPR with a particular cutoff, good if above normal (50:50), 0.5-0.7 low use, 0.7-0.9 useful, >0.9 great test
Term
Quality control (QC)
Definition
totality of lab procedures to assure an accurate result
Term
Quality assurance (QA)
Definition
includes control of pre/post-test problems
Term
Total/continuous quality improvement (QI)
Definition
prevents problems and assures patient safety
Term
Pluripotent Stromal Cells
Definition
become ECs/adipocytes/osteoblasts/chondroblasts
Term
Bone Marrow aspirates
Definition
smear films of developing cells, quantitative/qualitative analysis of myeloid/erythroid/megakaryocytes, morphological assessment of disease state
Term
Bone Marrow Biopsy
Definition
cores of bone and marrow, must be de-calcified, demonstrate architecture of cellularity, method of choice for metastatic tumors/infectious granulomas/fibrosis, evaluation of bone metabolism for hyperparathyroidism
Term
Reticulocyte count
Definition
supravital stain for residual RNA, indicates erythropoiesis, percentage or absolute number, usually only 1% of peripheral erythrocytes
Term
hematocrit
Definition
%cell mass of blood/total volume of whole blood
Term
Mean corpuscular hemoglobin (MCH)
Definition
content of hemoglobin in an average cell
Term
RDW
Definition
coefficient of variation for RBC distribution, measures anisocytosis
Term
Anisocytosis
Definition
varying sizes of RBCs, RDW>reference range
Term
Microcytosis
Definition
MCV<80fL, iron deficiency/anemia of chronic disease/thalassemia/sideroblastic anemia
Term
Macrocytes
Definition
MCV>100fL, B12/folate deficiency/thyroid disorders/neonates/reticulocytosis
Term
poikilocytosis
Definition
varying shapes of RBCs
Term
Spherocytes
Definition
perfectly round with no central pallor, hereditary spherocytosis/autoimmune hemolysis/severe burns
Term
elliptocytes/ovalocytes
Definition
more narrow/round ends, hereditary elliptocytosis/megaloblastic anemia/severe iron deficiency/thalassemia/congenital dyserythropoietic anemia/sickle-cell anemia
Term
Target cells
Definition
bullseye appearance with increased surface membrane, hemoglobinopathy/thalassemia/liver disease/iron deficiency/post-splenectomy
Term
Schistocytes
Definition
pieces of RBCs with no central pallor, microangiopathic hemolysis/thrombolytic thrombocytopenia purpura/DIC/malignant HTN/eclampsia/sepsis/prosthetic heart valves
Term
Tear drop cells
Definition
blunt or round tapered edge, leukoerythroblastosis/myelofibrosis/megaloblastic anemia/thalassemia
Term
Stomatocytes
Definition
RBCs with a slit central pallor, hereditary stomatocytosis/Rh-null disease/alcoholism/liver disease
Term
Spiculated RBCs
Definition
acanthocytes if uneven spurs/spikes/horns, echinocytes if even burrs/blunt, liver diesease/renal disease/hemolysis/Abetalipoproteinemia
Term
Sickle cells
Definition
two pointed ends with dense eosinophilia, sickle cell disease/S-Beta thalassemia
Term
Rouleaux formation
Definition
hyperproteinemic neutralizes RBC membrane charge, stacks of coins, multiple myeloma/monoclonal gammopathy/hypergammaglobulinemia/chronic infection/inflammation (acute phase proteins)/lymphoproliferative disorders
Term
RBC agglutination
Definition
artifactual low RBC count and high MCV, due to cold agglutination, cold autoimmune hemolytic anemia/paroxysmal cold hemoglobinuria/cold agglutin syndrome/lymphoma-associated IgM/plasma cell dyscriasis-associated IgM
Term
Supravital stain
Definition
reticulocytes (RNA), basophilic stippling (RNA), siderotic granules (Fe), heinz bodies (denatured globin)
Term
Romanovsky's stain
Definition
reticulocytes (RNA), basophilic stippling (RNA), siderotic granules (Fe), Howell-Jolly body (DNA)
Term
Howell-Jolly body
Definition
single purple RNA inclusion, splenectomy/splenic atrophy/hemolytic anemia/megaloblastic anemia/dyserythropoiesis
Term
Heinz body
Definition
indicates a-thalassemia, splenectomy, G6PD deficiency
Term
Hemoglobin H
Definition
indicates a-thalassemia (unstable Beta-4 hemogloblin)
Term
Basophilic stippling
Definition
granules distributed around RBC, blood loss/lead poisoning/megaloblastic anemia/thalassemia/refractory anemia/myelodysplasia/congenital dyserythropoietic anemia/pyrmidine-5' nucleotidase deficiency
Term
Pappenheimer bodies
Definition
1-2 small granules of Fe at periphery of cell, splenectomy/sideroblastic anemia/megaloblastic anemia/thalassemia/hemolytic anemia/congenital dyserythropoietic anemia
Term
Bohr effect
Definition
H+ weakens O2 binding, CO2 lowers O2 binding (O2 released in oxygen-starved tissues)
Term
Direct bilirubin
Definition
conjugated to glucuronyl, indicates liver function
Term
Indirect bilirubin
Definition
unconjugated to glucuronyl, indicates level of un-processed heme from hemolysis
Term
Total Iron Binding Capacity (TIBC)
Definition
measure of iron in transferrin, increased binding capacity indicates less iron available
Term
Skipper-Schabel Model
Definition
doubling time of cancer cells is constant, cells killed in therapy is constant, assume homogeneity of cancer cells/no growth restrictions, based on in vitro experiments, works well for leukemia/lymphoma/metastasis (increased O2), long recovery periods can lead to re-growing tumors
Term
Gompertzian Growth Model
Definition
tumors of proliferating/non-proliferating cells, sub-optimal growing conditions, small tumors grow linearly (skipper phase), large tumors grow non-linearly, best chance for cure is to treat tumor early, frequency of treatment > dose of treatment
Term
Drug Dosing/Scheduling
Definition
based on body surface area (BSA), administer at maximum tolerated dose, 1-3 weeks rest to recover normal tissue
Term
homocysteine test
Definition
accumulates in B12 and folate deficiency
Term
methylmalonic acid test
Definition
accumulates in B12 deficiency
Term
Hemoglobin electrophoresis
Definition
hemoglobins have different band properties, test alkali & acidic migration
Term
HPLC
Definition
peaks corresponding to Hgb types, gives percentages of different Hgb
Term
Forward ABO typing
Definition
recipient's cells treated with anti-A/B antibodies
Term
Reverse ABO typing
Definition
recipient's plasma (antibodies) added to known A/B cells
Term
Direct Coombs Test (DAT)
Definition
detection of antibodies/complement on patient's RBCs, positive for autoimmune disease/medications/hemolytic disease of fetus/transfusion reactions
Term
Indirect Coombs Test (IAT)
Definition
patient's serum added to a sample of transfusion cells to look for reactions
Term
Type and screen
Definition
patient may need blood, flexible for blood bank
Term
Type and cross
Definition
patient will need blood, designated unites for that patient
Term
Antibody screen
Definition
application of indirect Coombs, antibodies for HDFN&HTR, reactive at 37C
Term
Warm antibodies
Definition
active at 37C, opsonization of RBCs/phagocytosis in spleen, positive DAT for Ig, systemic disease/lymphoproliferative disorders/drugs, treat with splenectomy/immunosuppressants
Term
Cold antibodies
Definition
active <30C, cell is coated with C3b/phagocytosis by MPS, positive DAT for complement, recovery from mycoplasma/EBV, lymphoid neoplasms/idiopathic
Term
Kinetic anemia
Definition
hypoproliferative/hemolysis/bleeding
Term
Refractory anemia
Definition
did not respond to Fe/folate/B12
Term
Tests for microcytic anemia
Definition
iron studies, c-reactive protein
Term
Tests for macrocytic anemia
Definition
B12/folate, LDH/haptoglobin, Coombs
Term
Tests for normocytic anemia
Definition
serum EPO, SPEP
Term
Primary granules
Definition
lysozyme/collagenase/myeloperoxidase/elastase/cathepsins/neutral proteases
Term
Secondary Granules
Definition
lysozyme/collagenase/lactoferrin/B12-binding protein/phophatases
Term
Toxic granules
Definition
promeyeolcytic granules in segmented PMNs
Term
Dohle bodies
Definition
RER inclusions in periphery of cytoplasm, light blue stain
Term
Auer rod
Definition
indicative of AML
Term
Alder's Anomaly
Definition
large azurophilic granules, affects PMNs/lymphocytes/monocytes, lysosomal accumulations, associated with mucopolysaccharidosis
Term
May-Hegglin Anomaly
Definition
autosomal dominant, leukopenia, thrombocytopenia, giant platelets, dohle bodies, all leukocytes affected, RNA ultrastructure altered, mild bleeding
Term
Chediak-Higashi Anomaly
Definition
giant fused granules, usually in albinos, autosomal recessive, usualy granulocytes but rarely affects lymphocytes
Term
Pelger-Huet Anomaly
Definition
bilobed PMNs (heterozygotes) or non-sgmented PMNs (homozygotes), acquired form due to myelodysplasia, asymptomatic left shift
Term
Donath-Landseiner Test
Definition
for paroxysmal cold hemoglobinuria
Term
Ham Test
Definition
for paroxysmal nocturnal hemoglobinuria (obsolete, replaced by flow cytometry)
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