White Blood Cell Disorders 1 Flashcards
Leukocytes make up what percentage of the total blood volume?
1%
Where are leukocytes produced?
Bone marrow
What is the average lifespan of white blood cells?
4 days
What are the terms that mean increased or decreased WBCs?
Increased = leukocytosis Decreased = leukopenia
What can cause leukocytosis?
Infection/inflammation, leukemia or lymphoma
What can cause leukopenia?
AIDS, corticosteroids
What is the most abundant granulocyte?
Neutrophils
Which leukocytes are granulocytes? Which are agranulocytes?
Granulocytes = neutrophils, eosinophils, basophils Agranulocytes = monocytes and lymphocytes
Which type of WBC is associated with allergies and parasites?
Eosinophils
Which WBC is rare and prevents excessive clots?
Basophils
Which WBC turns into macrophages?
Monocytes
Which WBC is involved in adaptive immunity and has a nuclei that occupies most of the cell?
Lymphocyte
What are lymphocytes?
T cells, B cells, NK cells
What is the most common cause of reactive WBC disorders?
Microbial infections
What type of disorder makes up 40% of all childhood cancer related death?
Neoplastic WBC disorders (9% of adult)
What are the two types of WBC disorders?
Reactive (response to underlying disease) or neoplastic
What is the difference between neutropenia and agranulocytosis?
Neutropenia =
What things can cause neutropenia?
Metastasis to bone, infection like HIV, ADRs, autoimmune injury, granulomas, chemotherapy, corticosteroids
What pathogen is responsible for infectious mononucleosis?
Epstein-Barr virus (EBV) aka Human herpesvirus 4 (HHV-4)
What are the signs and symptoms of mono?
Pharyngitis, fever, generalized lymphadenitis, splenomegaly, hepatitis
How long does it take for mono to self-resolve?
4-6 weeks
How is mono diagnosed?
Monospot test for EBV antibodies
Mono is a risk for later issue?
Various B cell malignancies (immunosuppression can add to the risk)
What is reactive lymphocytosis?
Infected and atypical B cells (12,000-18,000 cells/microliter)
What is the shape of B cells under microscopy with mono?
Oval, large, irregular with folded/indented nuclei
When does mono usually infect people in developing countries? In already developed countries?
DevelopING = during childhood DevelopED = adolescence
Is mono during childhood in developing countries usually symptomatic or is mono during adolescence in developed countries usually symptomatic?
During adolescence in developed countries (example = US)
What percent of those exposed to EBV succumb to infection?
50%
How is mono most commonly spread?
Saliva
What is the nickname for mono?
“Kissing disease”
What pathogen is responsible for cat-scratch disease?
Bartonella henselae
Cat-scratch disease affects 90% of which age group?
Children
What sign is sign 2 weeks after scratch with cat-scratch disease?
Cervical and axillary lymphadenopathy
How is cat-scratch fever diagnosed and treated?
Diagnosed by presence of Bartonella antibodies
No treatment because it’s self-limiting
Non-Hodgkin and Hodgkin lymphomas along with multiple myeloma are what kind of WBC conditions?
Lymphoid neoplasms
Acute myelogenous leukemia, myelodysplastic syndromes, and chronic myeloproliferative disorders are what kind of WBC conditions?
Myeloid neoplasms