White Blood Cell Disorders 2 Flashcards
What is the most common plasma cell cancer?
Multiply Myeloma (MM)
What age group is more commonly affected by multiple myeloma?
Older adults (average diagnosis at 70 years)
What gender and race are more likely to have multiple myeloma?
Males of African descent
What are the 3 overall features of MM?
1 osteolytic lesions
2 neurological issues
3 renal failure
What WBC condition presents with osteolytic “punched-out” lesions?
Multiple myeloma
The osteolytic lesions associated with MM lead to elevated serum levels of which mineral?
Calcium
What neurological symptoms can be caused by multiple myeloma?
Headache, dizziness, tinnitus, confusion
Detection of Bence-Jones proteins may be indicative of what condition?
Multiple myeloma
How is MM diagnosed?
Multifocal lytic lesions, Bence-Jones proteins in urine, M-spike on protein electrophoresis
What procedure confirms a MM diagnosis?
Marrow biopsy
What is the prognosis for MM?
Poor: average survival = 4-6 years
What is the treatment for MM?
Plasmapheresis and stem cell transplants
What is the most common site of an osteolytic lesions associated with multiple myeloma?
Vertebral column at 66% (can also be in ribs, skull, pelvis, femur, clavicle, or scapula)
TINY “punched-out” bony lesions of the cranium can be indicative of what condition but possibly confused with MM?
Hyperparathyroidism
What is the hallmark microscopic feature of Hodgkin lymphoma?
Reed-Sternberg cells (large cell with owl-eye nuclear appearance)
In what way is the lymphadenopathy of Hodgkin lymphoma similar to follicular lymphoma? How is it different?
Both are painless, but Hodgkin lymphoma presents with a single and isolated node
What are the symptoms of Hodgkin lymphoma?
Fever, night sweats, anemia, cachexia, splenomegaly, hepatomegaly
What are the risk factors for Hodgkin lymphoma?
Males ages 15-40 and over 55 Family history History of EBV infection (70%) Exposure to Agent Orange pesticide Immunosuppression
If Reed-Sternberg cells are seen under microscopy, what condition can be assumed?
Hodgkin lymphoma
What is the prognosis for Hodgkin lymphoma?
Favorable with chemotherapy and radiation
Radiation of Hodgkin lymphoma increased the risk of what types of secondary cancers?
Lung, melanoma, breast
Myeloid neoplasms most commonly affect what age group?
Adults
Myeloid neoplasms arise from transformed myeloblast which are what types of cells?
Neutrophils, basophils, eosinophils, erythrocytes, platelets
What are the three categories of myeloid neoplasms?
1 acute myelogenous leukemia (AML)
2 myelodysplastic syndromes
3 chronic myeloproliferative disorders
What is the average age of diagnosis of acute myeloid leukemia?
50
What is displaced by immature myeloblasts during acute myeloid leukemia?
Marrow
What important process is suppressed with acute myeloid leukemia?
Hematopoiesis
Acute myeloid leukemia may resemble which other condition?
Acute lymphoblastic leukemia
Auer rods upon microscopy are associated with what condition?
Acute myeloid leukemia
What is a major feature of AML?
Pancytopenia
What is the prognosis for AML and what makes it worse?
Poor: 15-30% long term survival; worse with history of myelodysplastic syndromes
What conditions were previously known as “pre-leukemias”?
Myelodysplastic syndromes
What is the most common age range of diagnosis for myelodysplastic syndromes?
50-70 years
What happens with myelodysplstic syndromes?
Marrow fills with myeloblasts and the ability to differentiate cells is disordered
Why were myelodysplastic syndromes previously known as pre-leukemia?
40% of MDS will transform into AML
Megaloblasts (hypercellular marrow) seen in what condition will resemble megaloblastic anemia?
Myelodysplastic syndromes
What are risk factors for MDS?
Chemotherapy, irradiation, monosomy and trisomy
What is the prognosis for MDS?
Poor: median of 1-2 years and poor response to treatment of chemo and blood transfusions
What are the categories of chronic myeloproliferative disorders?
1 chronic myelogenous leukemia (CML)
2 polycythemia vera
3 primary myelofibrosis
In what kind of myeloid conditions is the ability to differentiate myeloid stem cells retained but the ratios become disproportionate?
Chronic myeloproliferative disorders
What is the age range for chronic myelogenous leukemia?
25-60 years old
Which specific cells are involved with the leukocytosis of chronic myelogenous leukemia?
Granulocytes and platelets
Extreme splenomegaly is associated with which myeloid condition?
Chronic myelogenous leukemia
Philadelphia (Ph) chromosome is associated with which condition in 95% of cases?
Chronic myelogenous leukemia (CML)
What is the medication for chronic myelogenous leukemia?
Tyrosine kinase inhibitors
What is the accelerated phase of CML called that 50% of all cases reach?
“Spent phase” or “blast crisis”
What is the result of the Philadelphia chromosome?
Decreased myeloblast dependence on GFs
The red pulp of the spleen presents as a more beefy and massive appearance in which condition?
CML
What mutation is associated with polycythemia vera?
Point mutations: JAK2 - downstream signal of EPO
What is the average age of diagnosis of PCV?
60 years (older adults)
How is PCV diagnosed?
Polycythemia and decreased erythropoietin
What is the major concern with PCV?
Blood viscosity due to increase of whole blood volume
What organs are involved with the multiple organ congestion of PCV that can lead to infarction?
Heart, spleen, kidneys
What is the prognosis for PCV with and without treatment?
With = 10-20 years post diagnosis Without = 3 years
What condition presents as diffuse marrow fibrosis?
Primary myelofibrosis
What organ primary enlarges with primary myelofibrosis?
Spleen (infarctions are common)
What is the appearance of the RBCs in the peripheral blood with primary myelofibrosis?
Dacrocytes
What are histiocytes?
Macrophages or dendritic cells
What are the dendritic cells of the skin/mucosa?
Langerhans cells
Birbeck granules making organelles look like “tennis-rackets” are associated with what condition?
Histolytic neoplasms
What is the location for unisystem Langerhans cell histiocytosis?
Calvary, ribs, femur
All forms of unisystem Langerhans cell histiocytosis are associated with what protein abnormality and issue?
Abnormal Ras and increased signal transduction
Multisystem Langerhans cell histiocytosis is more common among what gender, age group, and race?
Males, children under 2 years, and Caucasians
What are the signs of Langerhans cell histiocytosis?
Fever, multifocal skin lesions
What is the prognosis of Langerhans cell histiocytosis?
Without treatment, fatal
With chemo, 5 years survival (50%)
What are signs of bleeding disorders?
Petechiae, ecchymosis
What is the stimulus for disseminated intravascular coagulation?
Widespread injury (examples = MVA, crush injuries)
What kinds of conditions can cause endothelial injury that could progress into DIC?
Sepsis, SLE, heat stroke, cancer, birth
Thrombocytopenia is common amount what kind of patients?
HIV/AIDS
What is purpura?
Red/purple skin discolorations
What causes immune thrombocytopenic purpura?
IgG antibodies attack platelets
Which form of immune thrombocytopenic purpura affects children? Females 20-40 years of age?
Children = acute ITP
Females 20-40 years of age = Chronic
What are signs of chronic immune thrombocytopenic purpura?
Petechiae, epistaxis, gum bleeding, easy bruising
What is the treatment for immune thrombocytopenic purpura that leads to 65% remission?
Splenctomy
What is the inheritance pattern for von Willebrand Disease?
Autosomal dominant
What is the result of decreased von Willebrand factor?
Dysfunctional platelet adherence to vessel wall
What is the most common inherited bleeding disorder?
Von Willebrand Disease (1% of the population)
Von Willebrand Disease mimics what condition?
Thrombocytopenia
What is the treatment for von Willebrand Disease?
Transfusions or medication to increase vWF (also avoid blood thinners like aspirin and Coumadin)
What is the inheritance pattern for hemophilia A?
X-linked recessive
What gender is most likely to have hemophilia A?
Males
Which coagulation factor is mutated with hemophilia A? B?
Hemophilia A = VIII
Hemophilia B = IX
Which is more common: hemophilia A or B?
Hemophilia A
What condition is also known as Christmas disease?
Hemophilia B
Which affects soft tissues and joints: hemophilia A or B?
A
Which blood disorder has the unique feature of absent petechiae?
Hemophilia A
What is the treatment for hemophilia A and B?
Infusion of corresponding coagulation factor
What is the inheritance pattern for hemophilia B?
X-linked (males more affected)
What is unique about the symptomalogy of hemophilia A and B?
Clinically identical
Thymic hyperplasia is seen in what conditions?
Myasthenia gravis, SLE, RA
What is an early treatment option for thyme hyperplasia?
Thymectomy
What causes thymic hyperplasia?
Reactive B cells in thymus
A thymoma most commonly affects what populations?
Adults or myasthenia gravis patients
What are the risk factors for developing a thymoma?
Asian or EBV infection