Hematology/Oncology Flashcards
What is normal hemoglobin for males and females?
14-18g/100nl (males) and 12-16g/100nl (females)
TNM - Tumor Staging Review
T = Tumor Size in CM N=How many lymph nodes are involved M=Has it metastasized
Normal HCT
Hct measures the % of a given volume of whole blood that is occupied by erythrocytes; the amount of plasma to total RBS mass (RBC concentration).
Normal - 40-54% (male) and 37-47 (female)
Normal TIBC?
250-450 ug/dl
Normal serum iron?
50-150ug/dl
Normal MCV**
Mean Corpuscular Volume (average size) 80-100fl
Microcytic Anemia
[MCV = <80fl] Iron deficiency anemia or thalassemia
Macrocytic Anemias
[MCV = >100fl) B12 or folate deficiency (can be due to alcoholism, liver failure, drug effects, gastric sleeve etc.) // AKA Megaloblastic anemias
Normocytic Anemias
MCV is 80-100fl // Anemia of chronic disease (i.e. sickle cell, renal failure, blood loss, hemolysis - etc. ).
Iron deficiency anemia
// Most common type of anemia (except in the elderly). Iron loss exceeds intake due to a variety of reasons.
Symptoms: as the Hct falls <30% you will see dyspnea, fatigue, headache, postural hypotension, palpitations and weakness. Palpitations, tachycardia and fatigue.
MCV <80 + MCHC is less than 32% + low serum ferritin (<50ng/dl) + High TIBC (>250) and High RDW (normal is 12-15%)
Iron deficiency anemia treatment
Oral Ferrous Sulfate 300-325mg 1-2 hours after meals. Eating decreased absorption 45-50%. Iron should never be taken with antacids. Taking oral iron with Vit. C increases absorption.
Foods that are high in iron: raisins, green leafy veggies, red meat, citrus, iron fortified breads and cereals
(Beta) Thalassemia
Genetically inherited disorder resulting in abnormal Hgb production and MICROCYTIC HYPOCHROMIC anemia.
Asian with anemia? Think Thalassemia!
S/Sx are unremarkable unless the form of Thalassemia is severed.
Caused by a decreased production in normal adult Hgb - Hgb A
Patho of Thalassemia
Hgb A (adult Hgb) has 2 polypeptide chains with 2 alpha and 2 beta chains. In a person with beta Thalassemia - the beta global chains are reduced or absent.
Thalassemia Minor = Heterozygous and will mimic iron deficiency anemia.
Thalassemia major is also known as Cooley’s anemia and is Homozygous - with a severe form and presentation just a few months after birth (because you still have fetal Hgb at birth!)
Cooley’s Anemia
Thalassemia Major - homozygous and severe form of Thalassemia (a microcytic hypo chromic anemia.)
Early in life you will see (as Hgb A takes over) - FTT, feeding difficulties (due to lack of oxygen), fever, diarrhea, hepatosplenomegaly, jaundice, maxillary enlargement
Thalassemia Management
No treatment for minor forms.
For Cooley’s anemia - RBC transfusion/splenectomy. Iron is CONTRAINDICATED due to risk of iron overload.
Folic Acid Deficiency
Alcoholism!!!** - this is anemia of inadequate intake/malabsorption of folic acid.
S/Sx - The usual anemia symptoms + Glossitis (BEEFY red tongue is the case in both B12 and Folic acid - but NO NEUROLOGICAL signs are seen with Folic Acid Deficiency – this differentiates the two in clinical presentations)
MCV >80, MCHC 32-36% = MACROCYTIC and NORMOCHROMIC
Serum folate will be decreased and RBC folate will be <100ng/ml
Management - 1mg of folate every day. Dietary intake - bananas, peanut butter, fish, green leafy veggies, iron fortified breads and cereals
Pernicious Anemia
Pernicious is Intrinsic and you need some B12!
MACROCYTIC (MCV >80) and NORMOCHROMIC (MCHC 32-36%) anemia due to deficiency of INTRINSIC FACTOR which results in a malabsorption of B12
Glossitis + a positive Romberg sign and Babinski sign
Serum B12 will be <200pg/ml and Anti-IF (intrinsic factor) and anti-parietal cell antibody test should be done
Management - 100mcg IM once weekly of Cyanocobalamin
Romberg Sign
Swaying with eyes closed - think Pernicious anemia/B12 deficiency
Babinski Sign
Extension of the tow with plantar stimulation —- Obviously has multiple etiologies - but Pernicious Anemia is one specific finding that is a possible board exam question
Anemia of chronic disease
Is a NORMOCYTIC and NORMOCHROMIC anemia that is associated with chronic inflammation, infection, renal failure, and malignancy
TIBC will be LOW <250
but SERUM IRON will be high (>100ng)
MCV and MCHC will be normal
Treat the associated disease
Sickle Cell Anemia
Chronic HEMOLYTIC anemia that is genetic. Sickling of the cells cause hyperviscocity and cellular hypoxia resulting in acidosis and tissue ischemia. Factors precipitate sickling include hypoxia, infections, high altitudes, etc. ..
Hgb will be decreased but you need to order a PERIPHERAL SMEAR to diagnose Sickle Cell.
Management includes fluids, analgesics, and oxygen
Von Willebrand
Genetic. Reduced ability to clot caused by a mutation causing a deficiency in VW factor and clotting factor VIII.
Treatment is Demopressin/DDAVP and factor VIII concentrate. Patients can take this in a nasal spray - fyi.
Leukemias
Lymphocytic leukemia refers to abnormal cell growth in the marrow cells that become lymphocytes, a type of white blood cell that plays a role in the immune system. In myelogenous leukemia, abnormal cell growth occurs in the marrow cells that mature into red blood cells, white blood cells, and platelets. There are four broad classifications of leukemia:
Acute lymphocytic leukemia (ALL)
Acute myelogenous leukemia (AML)
Chronic lymphocytic leukemia (CLL)
Chronic myelogenous leukemia (CML)
More frequently found in MALES
Ssx/ will see generalized lymphadenopathy, anorexia, fatigue, weight loss,.
Peripheral blood smears can usually distinguish acute vs chronic forms of leukemia but you must undergo a bone marrow biopsy to confirm the diagnosis.
Treatment: Chemotherapy. One important note for boards - ALLOPURINOL should be started to reduce the likelihood of tumor lysis syndrome.
Acute Myelogenous Leukemia (AML)
80% of all ACUTE leukemias in adults (so AML is more common than ALL)
Remission rates are 50-85%
