You are performing cytochemical stains on a bone marrow of a patient who is recently diagnosed with acute leukemia.  Stains for myeloperoxidase and specific esterase are positive. Periodic acid-Schiff (PAS) staining is negative. What lineage are the blasts present in the patient’s sample?

An 8-year-old male was found to have lymphocytosis. Flow cytometry of the peripheral blood revealed the following results: Which is the phenotype of the cell population represented as GREENin the image?

An excess of the cells seen below was seen in the peripheral blood of a patient.  These cells represented a clone of cells that was CD3 and CD8 positive.  The case was diagnosed as Large Granular Lymphocyte Leukemia.  The cells are:

Which Hb A1c value is consistant with an average blood glucose of 99 mg/dL?

Which of the following substances is the biologically active precursor of a fat soluble vitamin?

A 74 year old presented with acute painful swelling in the right leg following a cross country airplane flight. The patient has had persistent prolonged aPTTs of 89 seconds, 85 seconds, and 95 seconds, which correct with a mixing study, suggesting a factor deficiency. The patient has no history of bleeding despite several previous surgeries. The results of the aPTTs indicate a likely deficiency in:

A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient also showed:

Three tubes of CSF are collected, labeled, and sent to the laboratory for testing. Which tube should be used for chemical analysis, such as total protein and glucose?

When performing a manual WBC count on a CSF sample, all nine large squares on each side of the chamber were counted, and the counts below were obtained. Calculate the reported value. Side 1 CSF WBCs = 16Side 2 CSF WBCs= 20

Rheumatoid factor is most often this immunoglobulin class: