Malignancies that originate from hematopoietic cells in the bone marrow are:

Which immune mechanism is involved in contact dermatitis?

In which of the following conditions would you not see an increase in alpha-fetoprotein? 

Anaphylaxis is characterized by which of the following?

A 16-year-old male goes to his physician for an annual checkup. A routine urinalysis indicates the presence of blood, an increase in protein, and an increase in urea. The young man reports that he has been feeling tired and has a persistent cough. The doctor orders additional laboratory testing, including a serum test for rheumatoid factor, antinuclear antibody testing, anti-streptolysin O testing, and testing for the presence of anti–basement membrane antibodies. Only the latter test was positive. What disease is the most likely cause of the symptoms?

Which laboratory finding or findings aid in the diagnosis of the leukemia from the case study AND WHY? This is a 2 PART QUESTION. A. CBC results B. Splenomegaly C. Peripheral blood smear review

A 24-year-old male visits his physician with complaints of fatigue and weakness. He reports previously having a healthy appetite but that recently he’s been feeling full in his abdomen, making eating uncomfortable. Upon physical examination, the physician finds that the patient’s spleen is enlarged. The patient reports no history of blunt contact to the abdomen that would cause such enlargement. The physician orders laboratory work. The most striking results are anemia, leukopenia, and thrombocytopenia. The results also indicate that lymphocytes with abnormal morphology are within the peripheral blood. The lymphocytes are identified as having cytoplasmic projections. The physician is concerned that the patient may have a leukemia, which commonly presents with the classic triad of anemia, leukopenia, and thrombocytopenia. Based on the patient’s age and gender, which of the leukemias is most likely?  

What is the definition of a sarcoma? 

A child suspected of having an inherited humoral immunodeficiency disease is given a diphtheria/tetanus vaccine. Two weeks after the immunization, his level of antibody to the specific antigens is measured. Which result is expected for this patient if he does have this deficiency?

A 57-year-old male is found to have increased levels of small lymphocytes incidentally on a peripheral smear completed during routine microscopic examination of blood work. This is suggestive of which of the following?