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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?

In which of the following autoimmune diseases are antibodies to acetylcholine receptors produced, thereby blocking the signal to activate muscles?

A patient’s urine immunofixation electrophoresis shows excessive amounts of free monoclonal light chains. These light chains are referred to as:

An exaggerated reaction directed against an antigen that is harmless is called: 

To determine if a patient is allergic to peanuts, the best test to perform is:

The characteristic antinuclear antibody pattern produced by antibody to DNA-histone complexes is: (LO 8, T2)

What is the definition of a carcinoma?