🩺 Q364: A 60-year-old male has a hematocrit of 55% and an elevated erythropoietin level. Which diagnostic test is most appropriate to rule out polycythemia vera?

🩺 Q364: A patient undergoes a tuberculin skin test. The induration is measured at 15mm after 48 hours. This reaction is mediated by which of the following?

🩺 Q366: A patient’s serum shows a persistent 'M-spike' in the gamma region on electrophoresis. Immunofixation reveals IgG and lambda light chains. What is the next most appropriate diagnostic step?

🩺 Q366: Which immunoglobulin class is the primary mediator of the secondary immune response and is the only antibody capable of crossing the placenta?

🩺 Q367: A patient requiring transfusion has a history of anti-Kell antibodies. What is the most likely blood product compatibility outcome?

🩺 Q369: Which analytical method is considered the gold standard for therapeutic drug monitoring (TDM) due to its high specificity and sensitivity?

🩺 Q369: A urine specimen shows a positive result for blood on the reagent strip but no RBCs are seen on microscopic examination. What is the most likely cause?

🩺 Q371: A urinalysis reveals a positive dipstick for blood but zero RBCs are seen on microscopic examination. What is the most likely cause?

🩺 Q371: A patient with nephrotic syndrome presents with 'Maltese cross' formations in the urine sediment under polarized light. These are characteristic of:

🩺 Q372: Which marker is most helpful in differentiating iron deficiency anemia (IDA) from anemia of chronic disease (ACD)?

🩺 Q374: Which crystal is described as 'coffin-lid' shaped and is typically found in alkaline urine?

🩺 Q374: A patient with severe diarrhea presents with a metabolic acidosis. Which electrolyte finding is most consistent with this presentation?

🩺 Q376: A urine specimen appears dark brown or black and turns even darker upon standing. Which metabolite is likely responsible?

🩺 Q376: A patient with a prosthetic heart valve develops endocarditis. Blood cultures yield a Gram-positive coccus that is catalase-negative and PYR-positive. What is the most likely species?

🩺 Q377: The presence of significant levels of nitrites in a urine specimen is most indicative of:

🩺 Q379: Which fixative is the standard for routine histology because it cross-links proteins without destroying antigenicity for most immunohistochemical stains?

🩺 Q380: A patient with chronic obstructive pulmonary disease (COPD) has the following blood gas results: pH 7.32, pCO2 55 mmHg, HCO3 28 mmol/L. How is the acid-base status best classified?

🩺 Q381: Which tumor marker is most clinically useful for monitoring the recurrence of ovarian cancer?

🩺 Q382: Which cardiac biomarker remains elevated for the longest duration (up to 10-14 days) following an acute myocardial infarction?

🩺 Q383: What is the primary metabolic defect in a patient with Type 1 Diabetes Mellitus?