Hematology Flashcards
most common inherited bleeding disorder
Von Willebrand Disease
What is the most likely diagnosis: Epistaxis Ecchymosis Menorrhagia Normal platelet count and PT/INR History of bleeding after aspirin or NSAID use
Von Willebrand Disease
What is the best initial test
-Von Willebrand disease
Evaluate bleeding
-CBC, PT, PTT
Investigate Von Willebrand
- Von Willebrand factor ristocetin cofactor activity (vWF:RCo)
- Von Willebrand factor antigen (vWF:Ag)
- Factor VIII activity
What is the treatment of choice
-Von Willebrand Disease
Desmopressin if symptomatic
What is 2nd line tx
-Von Willebrand Disease
Factor VIII
Von Willebrand factor
Hemophilia most commonly affects (M or F)
and it is __-linked __
Males
x-linked recessive
What is the most likely diagnosis:
Male child
Joint bleeding
May give history of prolonged bleeding with circumcision, dental repair, or surgery
PT, platelets, and platelet function is typically normal
PTT is prolonged
Hemophilia
What is the most accurate test
Hemophilia
Specific assay for the disease (factor VIII, IX, or XI)
What is the treatment of choice
Hemophilia
Mild bleeding;
Moderate/severe bleeding
Mild bleeding: desmopressin
Moderate/severe bleeding: give specific factor missing
Secondary ITP most commonly from:
- Systemic disease: adult
- ITP most commonly chronic in adults
- Viral: Children
- ITP most commonly resolves in children - Common medications to induce ITP: quinidine, gold, penicillin, procainamide, TMP-SMX
Common medications to induce ITP:
quinidine gold penicillin procainamide TMP-SMX
What is the most likely diagnosis: Young woman Isolated low platelets Normal sized spleen Giant platelets
immune thrombocytopenic purpura
Next best step
Immune Thrombocytopenic Purpura
CBC
Best initial step
Immune Thrombocytopenic Purpura
CBC
What is the most accurate test
Immune Thrombocytopenic Purpura
Bone marrow biopsy
What is tx of choice
Immune thrombocytopenic purpura
- Platelets >30,000: observation
- Platelets <20,000: steroids (dexamethasone/prednisone)
- Platelets <10,000: Add IVIG for bump in platelets
What is 2nd line tx
immune thrombocytopenic purpura
1.IVIG if steroids fail or contraindicated
Also used if need rapid increase in platelets (works in a few days)
2.Splenectomy
3.Rituximab
4.Immune modulators (azathioprine or cyclosporine) or thrombopoietin receptor agonists.
5. Severe bleeding is treated with platelet transfusion, IVIG, and steroids
Most common cause of drug induced
Thrombotic Thrombocytopenic purpura
quinine
Thrombotic Thrombocytopenic purpura
is most common in which patients
women
young adult
black
What is the most likely diagnosis:
Hemolysis
Fragmented RBCs (schistocytes/helmet cells)
Renal dysfunction (increased creatinine/proteinuria)
Neuro and GI symptoms may be thrown in as well
Neurological dysfunction
low platelets
Thrombotic Thrombocytopenic Purpura
Most accurate test
Thrombotic Thrombocytopenic purpura
Reduced plasma ADAMTS13 activity
Treatment of choice
Thrombotic Thrombocytopenic purpura
- plasma exchange
- Steroids
- Rituximab
Iron Deficiency anemia MC secondary to
blood loss
-GI or menses
What is the most likely diagnosis Will give blood loss in vignette Heavy menses or GI bleed Decreased MCV Decreased iron/ferritin Increased TIBC/RDW
Iron deficiency anemia
Next best step
Fe deficiency anemia
look for source of bleeding
Best initial test
Fe deficiency anemia
CBC
Most accurate test
Fe deficiency anemia
Bone marrow biopsy
tx of choice
Fe deficiency anemia
ferrous sulfate
What is the most likely diagnosis Will give chronic disease in vignette Decreased or Normal MCV Decreased iron Normal ferritin Decreased TIBC
Anemia of chronic disease
Best initial test
anemia of chronic disease
CBC
What is the most accurate test
anemia of chronic disease
bone marrow biopsy
what is the treatment of choice
anemia of chronic disease
- address underlying issue
2. erythropoietin in ESRD
Alpha thalassemia is common in ____ populations
Asian
Beta thalassemia is common in ___ populations
African descent
What is the most likely diagnosis
Elevated iron and ferritin
Decreased MCV
Target cells or tear drop cells on smear
thalassemia
how does minor thalassemia present
asymptomatic
how does Beta major thalassemia present
- symptoms start 4-6mo
- bone marrow deformity
- severe anemia
- pathologic fractures
how does alpha major thalassemia present
hydrops fetalis
-causes fetal death
Target cells or tear drops on smear
thalassemia
what is best initial test
-thalassemia
CBC
What is the most accurate test
-thalassemia
electrophoresis
what is the treatment of choice
thalassemia
-trait
-major
trait: observation
major: transfusion & Fe chelation w/ deferoxamine
what is second line tx for thalassemia major
splenectomy
What is the most likely diagnosis
Hypersegmented neutrophils
Increased MCV
Elevated homocysteine
folate/b12 deficiency
hypersegmented neutrophils
& elevated homocysteine
folate/b12 deficiency
peripheral neuropathy and neurologic symptoms associated with which anemia
B12
increased methylmalonic acid (MMA)
B12 deficiency/ anemia
medications that can cause B12 deficiency
- metformin
- PPI
- cimetidine
Medications that can cause folate deficiency
- methotrexate
- trimethoprim
- phenytoin
- Etoh
Best initial test for B12 anemia
- get B12 level
2. Get MME (methylmalonic acid)
treatment of choice
B12 deficiency
- B12 replacement PO or IM
- if severe symptoms of preg IM preferred
treatment of choice
folate deficiency
folate replacement
polycythemia vera
presentation
- itching after hot showers
- elevated hematocrit
- Jak2 mutation
- typically asymptomatic
- hx of HTN or thrombotic event
Best initial test
-polycythemia vera
CBC
Most accurate test
-polycythemia vera
Jak2 mutation
tx of choice
polycythemia vera
phlebotomy
ASA
2nd line tx
polycythemia vera
high risk: hydroxyurea
-over 60 w/ thrombosis
which gender is more commonly affected in thrombocytosis
females
thrombocytosis
MC secondary causes
- chronic inflammation
- infection
- malignancy
erythromelalgia: burning of hands &feet
thrombocytosis
What is the most likely diagnosis
Look for symptoms of clotting and bleeding
Erythromelalgia: burning of hands and feet
Recurrent 1st trimester fetal loss in women
Elevated platelet count (can be up to 1,000,000 or more)
thrombocytosis
Best initial test
thrombocytosis
CBC
Most accurate test
thrombocytosis
Bone Marrow Biopsy
Tx of choice
-thrombocytosis
hydroxyurea
Hemochromatosis
-MC affects which population
50-60
male
What is the most likely diagnosis Male in 50s/60s Elevated LFTs Bronzing skin (hyperpigmentation) Diabetes Cirrhosis
Hemochromatosis
hemochromatosis
-presentation
- 50-60yo
- elevated LFT
- Bronzing sign (hyperpigmentation)
- DM
- Cirrhosis
Best initial test
-hemochromatosis
-ferritin & iron
most accurate test
-hemochromatosis
-liver biopsy
tx of choice
hemochromatosis
-phlebotomy
2nd line tx
-hemochromatosis
-deferoxamine (Fe chelation)
Sickle cell
-most commonly affected pop
African americans
What is the most likely diagnosis African American patient Acute chest, back, and/or extremity pain Lung infiltrates might be shown Fever Hemolysis on lab work
sickle cell
helmet cell & schistocytes
Thrombotic Thrombopcytopenia purpura
next best step
-sickle cell anemia
-if pt presents w/ fever, start antibiotics
Best initial test
-sickle cell anemia
peripheral smear:
- sickled RBC (NOT seen with trait)
- Howell-Jolly bodies
Howell-Jolly bodies
sickle cell anemia
Most accurate test
-sickle cell
HgB electrophoresis
Tx of choice
-sickle cell anemia
- folic acid supplements
- hydroxyurea (prevents acute syndrome)
- Acute pain crisis: hydration, O2, analgesia (may require opiods)
- IF fever >101 give ceftriaxone
Most Common leukemia in adults
CLL
What is the most likely diagnosis Patient over 50 complaining of fatigue Elevated WBC Cervical lymphadenopathy Peripheral smear shows smudge cells and small mature lymphocytes Anemia and thrombocytopenia
CLL
smudge cells & immature lymphocytes
CLL
best initial test for CLL
CBC
Most accurate test for CLL
- flow cytometry
2. bone marrow biopsy
tx of choice for
CLL
symptomatic & active:
- fludarabine
- cyclophosphamide
- rituximab
What is the most likely diagnosis Patient over 50 complaining of pruritis after hot showers Fatigue Weight loss Abdominal fullness Splenomegaly Extremely high WBC >100,000 Philadelphia chromosome translocation mutation
CML
Phildelphia chromosome is what kind of mutation and between which chromosomes
translocation
BCR (chromosome 22) and ABL (Chromosome 9)
Best initial test for
CML
CBC
Most accurate test for
CML
BCR-ABL1 fusion gene
Also known as philadelphia chromosome
Initial tx of choice
CML
Tyrosine Kinase inhibitors
- imatinib
- ibrutinib
2nd line tx
CML
bone marrow transplant
AML is more common in which pts
- Down Syndrome
- Li-Fraumeni
- Fanconi
Patient over 60 presenting with pancytopenia
-Low hgb: fatigue
-Low wbc: infection
-Low platelets: bleeding
> 20% blasts on peripheral smear
Auer Rods and Phi bodies on bone marrow biopsy
AML
Auer Rods & phi bodies
AML
Best initial test
AML
CBC peripheral smear
most accurate test
AML
flow cytometry
treatment of choice AML
- chemo
- If patient has acute promyelocytic leukemia (APL) subtype, then add all-trans retinoic acid (ATRA) aka Vit A
Used to be called M3 subtype
2nd line tx
AML
bone marrow transplant
MC pediatric anemia
ALL
What is the most likely diagnosis 5 year old patient presenting with a limp Pancytopenia Low hgb: fatigue Low wbc: infection Low platelets: bleeding >20% blasts
ALL
Best initial test ALL
CBC peripheral smear
most accurate test
ALL
flow cytometry
tx of choice
ALL
chemo
2nd line tx
ALL
bone marrow transplant
is non-hodgkin or hodgkin more common
non-hodgkin
What is the most likely diagnosis
Older patient presenting with fever, night sweats, and weight loss
Painless lymphadenopathy
Normal CBC
lymphoma
reed-sternberg cells
hodgkin lymphoma
pain with alcohol ingestion
hodgkin lymphoma
Best test lymphoma
excisional biopsy of lymph nodes
What is the treatment of choice
Non-Hodgkin Stage 1, 2, 3 and 4
R-CHOP (gold standard chemotherapy)
Rituximab, cyclophosphamide, doxorubicin
vincristine
prednisone
tx Hodgkin Stage 1 and 2:
Favorable disease:
ABVD (gold standard chemotherapy)
doxorubicin, bleomycin, vinblastine, dacarbazine
Unfavorable disease: ABVD + local radiation
tx Hodgkin Stage 3 and 4
ABVD plus radiation
multiple myeloma is MC in which population
African Americans
>70
What is the most likely diagnosis
70 year old African American patient complaining of bone pain
Pathological fractures
Renal failure
Peripheral smear shows rouleaux formation
Hypercalcemia
Anemia
multiple myeloma
Peripheral smear shows rouleaux formation
multiple myeloma
multiple myeloma
What is the best initial test
if sure:
if unsure:
If unsure: X-Ray of the area with bone pain to look for lytic lesions
If sure about MM: CT, MRI, or PET as they are better than x-ray
Most accurate test
multiple myeloma
bone marrow biopsy
treatment of choice
multiple myeloma
Chemotherapy and immunomodulators
Bortezomib, lenalidomide or cyclophosphamide, and dexamethasone
2nd line tx
multiple myeloma
Autologous hematopoietic cell transplantation
G6PD MC in which pop
American black males and some Mediterranean populations.
G6PD commonly exacerbated by
- Medications
- Aspirin
- Primaquine
- Dapsone
- Quinidine
- Nitrofurantoin
- Sulfonamides - Fava bean ingestion
- infection
G6PD presentation
Intermittent episodes of hemolysis
- Elevated reticulocyte count
- Elevated Indirect bilirubin
- Elevated LDH
- Decreased haptoglobin
Jaundice and darkening of the urine
2dary to increased bilirubin
G6PD levels will be low
Asymptomatic in between episodes
Peripheral smear may reveal bite cells and Heinz bodies
G6PD
repeat testing of G6PD in ___ mo to confirm event
3
G6PD initial test
peripheral smear
most accurate test
G6PD
G6PD activity levels
treatment of choice
G6PD
avoid oxidative stress/triggers