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84 Cards in this Set
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Erythrocyte Membrane Composistion: |
1. Proteins (50%) 2. Lipids (40%) 3. Carbohydrates (10%) |
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Protein Components of RBC Membrane: |
Integral Protein: Glycophorin A & Component A
Peripheral Protein: Spectrin & Actin |
Glycophorin A - Sialic Acid, (-) charge zeta potential, RBCs repel each other
Actin - Maintain Biconcave Shape of RBC membrane deformability |
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External Surface Components: |
1. Phospholipids 2. Phosphatidylcholine 3. Glycolipid 4. Sphingomyelin |
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Internal Surface Components: |
1. Phosphatidylethanolamine 2. Phosphatidylinositol 3. Phosphatidylserine |
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Cholesterol content of the membrane depends upon the |
1. Conc of Plasma Chole & Bile Acids 2. Activity of LCAT |
LCAT - Lecithin:Cholesterol Acyltransferase
Ovalocyte - Dec Chole |
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Metabolic Pathways on Erythrocyte: |
1. Embden - Meyerhof Pathway 2. Hexose Monophosphate Shunt (Oxidative Pathway) 3. Rapaport - Luebering Pathway 4. Methemoglobin Reductase |
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Pathway of Anaerobic Glycolysis (90%) Maintains cellular energy by generating ATP |
Embden - Meyerhof Pathway |
Glycolysis - Breakdown of Glucose from erythrocytes
*For every glucose broken down to lactic acid yields Two ATPs Controls flow of Na & K |
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Pathway that prevents denaturation of globin of the hgb molecule by oxidation Energy system couples oxidative catabolism of glucose with reduction of NADP to NADPH which is required to reduce glutathione Aerobic Pathway 10% Glycolysis |
Hexose Monophosphate Shunt (Oxidative Pathway) |
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Needed to neutralize oxidants to prevent denaturation of globin |
Reduced Glutathione |
Defective Hexose Monophosphate shunt yields insufficient reduced glutathione, therefore globin is denatured and then precipitates as aggregates referred to Heinz Bodies *G6PD Def |
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Pathway that generates 2,3 DPG (2,3 BPG Biphosphoglycerate) which regulate hemoglobin affinity to oxygen |
Rapaport - Luebering Pathway |
Dec 2,3 DPG - Inc Hemoglobin Affinity to Oxygen (SHIFT TO THE LEFT)
Inc 2,3 DPG - Dec Hemoglobin Affinity to Oxygen (SHIFT TO THE RIGHT) |
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Pathway that functions in the maintenance of heme iron in a functional state (Ferrous, Fe2+) requires the reducing action of NADH and enzyme methemoglobin reductase |
Methemoglobin Reductase Pathway |
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A condition in which there is an Inc concentration of Hemiglobin which is a derivative of hemoglobin in which iron is oxidized to the ferric state |
Methemoglobinemia |
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As RBC Ages, there is a |
1. Dec in its Size, Emzymes, ATP 2. Inc in Density |
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Approximately ___% of the RBCs leave the circulation each day and are broken down by the _________ |
1% Mononuclear Phagocyte System (MPS) |
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Destruction of RBCs outside of blood vessel
Splenic or Macrophage Phagocytosis
Also called macrophage-mediated hemolysis
90% Aged RBC Destruction |
Extravascular |
*When complement is not activated or incompletely activated
Inc 1. Unconjugated Bilirubin 2. Urine & Fecal Urobilinogen |
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Occurs when hgb breaks down in the blood and free Hgb is realeased into plasma Free Hgb binds to Haptoglobin, Hemopexin, & Albumin and is phagocytized by liver macrophages 10% Aged RBC destruction |
Intravascular |
*When complement is completely activated
HAPTOGLOBIN - major free hemoglobin transport protein |
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Variation in Cell Size |
Anisocytosis |
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An index of variation of cell volume in a RBC population Correlates w/ degree of anisocytosis Calculated by dividing SD by the mean of the red cell distribution |
Red Cell Distribution Width (RDW) |
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Normal sized RBC 6-8 um in dm MCV 80-100 fL |
Normocytic |
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Normocytic RBC: |
1. Acute Blood Loss 2. Hemolytic Anemia 3. Aplastic Anemia |
AHA |
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Small RBC <6 um in dm MCV <80 fL |
Microcytic |
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Microcytic RBC: |
1. Anemia of Chronic Inflammation 2. Thalassemia 3. IDA 4. Sideroblastic Anemia |
ATIS |
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Large RBC >8 um in dm MCV >100 fL |
Macrocytic |
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Macrocytic RBC: |
1. Bone Marrow Failure 2. Chronic Liver Dse 3. Megaloblastic Anemia 4. Myelodysplastic Syndrome 5. Reticulocytosis |
BCMMR |
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Variation of color of erythrocytes caused by unequal hemoglobin Concentration |
Anisochromia |
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Central pallor does not exceed 1/3 RBC dm MCHC 31-36% |
Normochromic |
AHA |
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Central Pallor > 1/3 RBC dm MCHC <31% |
Hypochromic RBC |
ATIS |
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No Central pallor MCHC >36% |
Hyperchromic New Term: Spherocyte |
Hereditary Spherocytosis - Inc OFT Test (d/t Na Chloride) |
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Blue-gray tint to RBC Pink Cytoplasm
Young RBC contain residual RNA
Stained w/ Brilliant Cresyl Blue, show up as Reticulocytes |
Polychromatophilic RBC |
1. Hemolysis 2. Hemorrhage |
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Presence of hypochromic cells and normochromic cells in the same film |
Dimorphic Anemia |
1. Sideroblastic Anemia 2. Weeks after iron therapy for IDA 3. Hypochromic Anemia after blood transfusion w/ normal cells |
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Alterations or variations in the shape of erythrocytes |
Poikilocytosis |
Dec ESR |
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Oval or Egg-like Seen in: 1. Vit B12 & Folate Def 2. RBC in Retic Stage |
Oval Macrocytes (Megalocytes) |
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Nuclear maturation lags behind cytoplasmic maturation
Impaired ability of cells to synthesize DNA |
Asynchronous Development |
Megaloblastic Anemia |
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Small, dense RBC, w/ few irregularly spaced projections of varying length
Inc Spingomyelin over Lecithin (Abn L:S Ratio) |
Acanthocyte Spur, Thorn Cell |
MANS 1. McLeod Syndrome 2. Abetalipoproteinemia 3. Neuroacanthocytosis 4. Severe Liver Dse |
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RBC w/ blunt or pointed, short projections, evenly spaced
Crenation d/t Osmotic Imbalance (loss of intracorpuscular water) |
Echinocyte (Artifactual) Crenated, Sea Urchin Burr Cell (Pathologic) |
1. Uremia 2. Liver Dse 3. Heparin Therapy 4. Pyruvate Kinase Def 5. Renal Insufficiency 6. Artifact (Hypertonic, Drying) |
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RBC w/ hemoglobin conc in the center & around the periphery resembling a target
Inc surface:volume ratio
Excessive cholesterol in the membrane or Hgb distribution Imbalance |
Codocyte Mexican Hat, Target Cell, Bell |
1. Hemoglobinopathies 2. Thalassemia 3. Liver Dse |
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Thinner variant of codocyte Central portion not completely datached from the outer membrane |
Leptocyte |
1. Hepatic Disorders 2. IDA 3. Thalassemia |
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Small, round, dense RBC with no central pallor
Dec Surface:Volume Ratio
Spectrin Def |
Spherocyte |
1. Hereditary Spherocytosis 2. Immune Hemolytic Anemia 3. Extensive Burns (W/ Schistocytes) |
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RBC w/ slit-like area of central pallor
Caused by Osmotic changes d/t Cation Imbalance (Na/K) |
Stomatocyte |
1. RH NULL SYNDROME 2. Hereditary Stomatocytosis 3. Acquired (Liver Dse, Alcoholism) 4. Artifact |
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Cigar shaped Defect in the cytoskeleton, Dec Membrane protein band 4.1 defect |
Elliptocyte |
1. Hereditary Elliptocytosis 2. Anemias assoc w/ malignancy 3. Hb C dse 4. Hemolytic Anemias (Occasionaly) 5. IDA 6. Sickle Cell Trait 7. Thalassemia 8. Pernicious Anemia |
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Thinner variant of Ovalocyte |
Pencil or Oat Cell |
IDA |
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1. Fragmented RBC due to rupture in peripheral circulation 2. RBC fragment in shape of helmet, Horn-like projections 3. Resemble Pinched Bottle, Triangular RBC w/ 2 Pallor Areas |
1. Schistocytes Schizocytes, Fragmentocytes Greek: Cloven, schizo:split 2. Helmet Cell (Keratocyte) 3. Knizocytes (Pinch Cell) |
MET 1. Microangiopathic Hemolytic Anemia 2. Extensive Burns 3. Traumatic Cardiac Hemolysis |
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RBC w/ a single pointed extension resembling a teardrop or pear Squeezing and fragmentation d/t splenic passage |
Dacryocyte (Teardrop) |
1. Primary Myelofibrosis 2. Myelophthisic Anemia 3. Thalassemia 4. Megaloblastic Anemia |
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Abnormality in membrane protein
Heat Sensitive Inc when blood cells are heated in vitro at 45C |
Microspherocyte, Pyropoikilocyte |
Normal RBC fragment @ 49C |
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Large, pale-pink staining ghost of the red cell |
Semilunar Bodies, Half-moon, Crescent Cell |
1. Malaria 2. Conditions causing overt hemolysis |
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Result from gelation of polymerized deoxygenated Hgb S
Polymerization of Hgb S is influenced by both lowered oxygen levels & dec blood pH |
Depranocyte (Sickle Cells) Holly-leaf shape |
Sickle Cell Anemia |
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RBC Inclusion that is round, purple staining nuclear fragments of DNA
Feulgen Reaction (+) |
Howell-Jolly Bodies |
Appear Singly in: 1. Hemolytic Anemia 2. Splenectomy 3. Splenic Atrophy in Sickle Cell Anemia
Appear Multiple in: 1. Megaloblastic Anemia 2. Other forms of nuclear maturation defect |
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RBC Inclusion that is coarse or fine, deep blue to purple granules
Result from aggregation of Ribosomes |
Basophilic Stippling (Punctuate Basophilia) |
Fine stippling: 1. Increased Polychromatophilia (Inc pxn of RBC) Coarse Stippling: 1. Lead Poisoning 2. Other dses w/ impaired Hgb synthesis 3. Megaloblastic Anemia 4. Other forms of severe anemia 5. Abnormal instability of the RNA in the young cell
Pyrimidine-5-Nucleotidase Deficiency PICA (Children: Lead Poisoning, Adult: IDA) Acoholism |
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Thin ring-like structure May represent a part of the Mitotic Spindle, remnants of microtubules, or a fragment of the nuclear membrane Figure of 8 |
Cabot Rings |
1. Megaloblastic Anemia or in severe anemias 2. Lead Poisoning 3. Dyserythropoiesis (Erythrocytes are destroyed before being released from bone marrow) |
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Round, refractile inclusions not visible on wright stain, best ID by supravital staining Consist of denatured globin |
Heinz Bodies |
1. G6PD Deficiency 2. Unstable Hgb (Hb Zurich, Hb Koln) 3. Oxidant Drugs, Chemicals 4. Exposure to sulfonamides or similar drugs 5. Splenectomized Patients Pitted Golf Ball - Multiple Heinz Bodies Bite & Blister Cells - Splenic pitting of Heinz Bodies |
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Seen with Brilliant Cresyl Blue stain and appear as blue globules
Precipitate of Hgb B Chains |
Hgb H Bodies |
1. Hgb H Disease |
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Reddish Hexagonal Cytoplasmic Crystal
Gold-Bar
Washington Monument (RODAK) |
Hgb C Crystals |
Homozygous Hgb C Disease the crystals form as deoxyhgb C polymerizes |
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Irregular Reddish cytoplasmic crytals Glove or Pistol Washington Monument (Steininger) |
Hgb SC Crystals |
Heterozygous Hemoglobin SC Disease, the crystals form as deoxyhgb S & C Polymerizes |
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Nucleated RBC that contains nonheme iron particles arranged in ring form
Excessive Iron overload in mitochondria of normoblasts; d/t defective heme synthesis |
Ringed Sideroblast |
Sideroblastic Anemia
*RBCs w/ Iron granules, Hemosiderin (+) Prussian Blue |
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Non-nucleated cell containing Iron granules Mature RBCs |
Siderocyte |
Sideroblastic Anemia |
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Inclusions composed of Ferric Iron
Prussian Blue stain preparations appear as multiple dark blue irregular granules at the periphery
On Wright's Stain, appear as Pale Blue clusters |
Pappenheimer Bodies (Siderotic) |
1. Sideroblastic Anemia 2. Hgbinopathies 3. Hyposplenism 4. Megaloblastic Anemia |
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Condition associated w/ mitochondrial iron loading in marrow erythroid precursors (ringed sideroblast) and ineffective erythropoiesis |
Sideroblastic Anemia |
Diagnosis: 1. RBC Indices 2. Microcytic, Hypochromic 3. Inc serum iron & serum ferritin 4. Ringed sideroblasts on Iron stain of BM aspirate |
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Plasmodium spp. Inclusions |
1. P. vivax - Schuffner's Dots 2. P. malariae - Ziemann Stippling 3. P. falciparum - Maurer Dot's 4. P. ovale - James Dots, Schuffner's |
Maturation Stage: Rings, Troph, Schizonts, Gametocytes Transmitted by: Bite of Female Anopheles mosquito Preferred Stain: Giemsa
Enlarged RBC Size: P. ovale, P. vivax Normal RBC Size: P. falciparum, P. malariae |
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Plasmodium spp. Infected RBC Population: |
1. YOUNG RBCs: P. ovale, P. vivax 2. MATURE: P. malariae 3. ALL AGES: P. falciparum |
Resistant to Malaria: 1. Fy (a-b-) - P. vivax, P. knowlesi 2. M-N- - P. falciparum merozoites |
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Gives tiny rings or occasionally as tetrads inside RBCs Tetrads may also appear in a Maltese Cross Formation |
Babesia spp. (Babesiosis) |
Resemble P. falciparum Rings but: 1. No Malarial Pigment 2. No growing troph 3. Vector: Ticks
B. microti - The most common cause of Babesiosis in US - Nantucket Fever - First cluster of cases found in Nantucket Island, Massachussets |
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Cells aggregate into random clusters or masses when exposed to various RBC abs Clumping of RBCs |
Agglutination |
1. Cold Agglutinin Dse (CAD) 2. Primary Atypical Pneumonia (Mycoplasma pneumoniae infec) 3. Cold Hemeagglutinin Dse (CHD) 4. Cold Agglutination Dse/Syndrome (CAS) |
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Occurs when an individuals RBCs agglutinate in his own plasma or serum tha contains no specific known agglutinins |
Autoagglutination |
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Represents RBCs arranged in rolls or stacks
Stack of Coin
Prsence of Inc concentrations of globulins & fibrinogen |
Rouleaux Formation |
1. Multiple Myeloma 2. Macroglobulinemia
*May also be d/t an Artifact as a result of delay in smearing the bld once it has been dropped on the slide
Drop of NSS: Disperse: Rouleaux Intact: True Agglutination |
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Granulocytes & Polymorphonuclears |
1. Basophils 2. Eosinophils 3. Neutrophils |
BEN Phagocytes: BEN+M Monocytes |
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Non-granulocytes & Mononuclear |
1. Monocytes 2. Lymphocytes |
Immunocytes: Lymphocytes |
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Genetically acquired, autosomal dominant disorder produces hyposegmentation of many of the mature neutrophils
Nuclear shape may resemble dumbbell or a pair of eyeglasses Pince Nez, Spectacle, Peanut Shaped, Hourglass |
Pelger-Huet Anomaly |
Pelger-Huet - Single or Bilobed nucleus
Assoc w/: 1. Pelger-Huet 2. Pseudo-Pelger-Huet 3. CML 4. MDS |
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Most frequently seen in segmented neutrophils with more than five lobes or nuclear segments
Vit B12 & Folic Acid Def Enlarged, Oval shaped Erythrocytes |
Hypersegmentation |
Pseudohypersegmentation may be seen in old segmented neutrophils Hypersegmented Neutrophil - Abnormal DNA Synthesis - Right Shift Assoc w/ Megaloblastic Anemia |
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Precipitated mucopolysaccharides that appear as purple red (purple-black) particles seen in leukocytes Can resemble very coarse toxic granulation |
Alder-Reilly Inclusions |
1. Hurler (Gargoylism) 2. Hunter 2. Maroteaux-Lamy types of genetic mucopolysaccharidoses |
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Gigantic, peroxidase-positive deposits represent abnormal lysosomal dev't in neutrophils & other leukocytes such as mono & Lympho
Neutrophils display impaired chemotaxis & delayed bacterial killing of ingested bacteria |
Chediak-Higashi Syndrome |
Autosomal Recessive Trait
Chediak-Higashi Granules - Giant red, blue, grayish round inclusions in cytoplasm - Def in enzymes for phagocytosis - Peroxidase & Sudan Black (+)
1. Assoc w/ Albinism 2. Recurrent Infections |
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Genetic condition characterized by presence of Dohle body-like inclusions in neutrophils, eosinophils, & monocytes Abnormally large and poorly granulated platelets Thrombocytopenia |
May-Hegglin Anomaly |
May-Hegglin Inclusions resemble Dohle-bodies |
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Seen in single or multiple, light-blue staining on Wright-stained blood smear
Predominantly seen in neutrophils, may also be seen in monocytes & lymphocytes
Aggregates of Free Ribosomes of RER (RNA) |
Dohle-Bodies |
Assoc w/: 1. Viral Infections (Severe) 2. Burns 3. Certain Drugs (Toxic States) |
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Prominent dark (purple-black) granulation, either fine or heavy, can be observed in band & segmented neutrophils & monocytes
Azurophilic (Primary) granules, Peroxidase (+)
Precipitation of Ribosomal Protein (RNA) caused by metabolic toxicity to cells |
Toxic Granulation |
Resmble Alder Reily
Assoc w/: 1. Infections 2. Toxic States 3. Burns 4. Malignancy 5. Chemical Poisoning |
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Similar to normal lympho exc. that the nucleus is notched, lobulated, & cloverleaf-like Occur in CLL May be artificially produced thru blood smear prep |
Reider Cells |
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Natural artifact produced during blood smear prep
Bare nuclei of lympho & neutro
Inc Fragility, Inc %
Inc in lymphocytosis, particularly CLL |
Smudge Cells/Basket Cell |
Degenerated nucleus or ruptured cell Fragile lymphocytes & break upon smearing |
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Cytoplasm stains a bright-red color and contains inc quantities of glycogen & intracellular deposits of amorphous matter |
Flame Cells |
Red-pink Cytoplasm Inc Cytoplasmic Ig (IgA) Multiple Myeloma |
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Plasma cell that contains small colorless vacuoles
Large protein globules
Cytoplasm completely filled w/ Russell Bodies |
Grape or Mott Cells |
1. Multiple Myeloma 2. Reactive States
*Russell Bodies - individual globules of IgA |
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Most common of the lysosomal lipid storage dses Def of B-glucocerebrosidase (B-glucosidase) which results in the accumulation of cerebroside in (macrophages) histiocytes |
Gaucher's Dse |
B-glucocerebrosidase (B-glucosidase) - Enzyme that normally splits glucose from its parent sphingolipid, glucosylceramide |
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Large cell, with one to three eccentric nuclei and a characteristically wrinkled cytoplasm "Chicken Scratch" Strongly Periodic Acid Schiff (PAS) Positive |
Gaucher Cell |
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Disorder represents a def of the enzyme that normally cleaves phosphoryl choline from its parent sphingolipid, sphingomyelin Sphingomyelin accumulates in the tissue macrophages |
Niemann-Pick Disease |
Pick Cell - Similar to Gaucher, but the cytoplasm is FOAMY in appearance |
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Accumulation of glycolipids & gangliosides
Def of Hexosaminidase A
Vacuolated Cytoplasm |
Tay-Sachs |
Sandhoff's - Accumulation of glycolipids & gangliosides - Def of Hexosaminidase A & B - Vacuolated Cytoplasm |
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Blue-Green cytoplasm Unknown Enzyme Deficient |
Sea Blue Histiocytes |
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Pink or Red, Rod-shaped cytoplasmic structures Fused primary granules Found in myeloid & monocytic series only Peroxidase (+) |
Auer Rods |
1. AML 2. AMML |
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Large empty white areas w/in cytoplasm Represent end stage phagocytosis |
Toxic Vacuoles |
1. Septicemia 2. Severe Infections 3. Toxic States |
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Neutrophil w/ large purple homogenous round inclusion w/ nucleus wrapped around 3 Factors needed to produce Cell: ANA, Cell Nuclei, Phagocytes w/ Ingested Material |
LE CELL |
Lupus Erythematosus |