🩺 Q116: A patient with severe diarrhea presents with low serum bicarbonate and a normal anion gap. This is consistent with which acid-base disturbance?

🩺 Q117: Which tumor marker is most associated with the monitoring of ovarian cancer treatment and recurrence?

🩺 Q118: Which of the following cardiac markers is considered the 'gold standard' for the diagnosis of myocardial infarction (MI) due to its high sensitivity and specificity?

🩺 Q119: When monitoring the therapeutic range of a drug, when is the best time to collect a 'trough' blood sample?

🩺 Q120: In the context of serum protein electrophoresis, what does a 'beta-gamma bridge' typically indicate?

🩺 Q121: A patient with symptoms of infectious mononucleosis has a negative heterophile antibody test (Monospot). Which laboratory test is the most appropriate for confirming an active Epstein-Barr Virus (EBV) infection?

🩺 Q122: An isolate from a cerebrospinal fluid (CSF) sample shows Gram-negative diplococci. Which biochemical test should be performed first to differentiate Neisseria meningitidis from Neisseria gonorrhoeae?

🩺 Q123: A stool examination reveals a parasite with four pairs of flagella and a 'falling leaf' motility. Which organism is identified?

🩺 Q124: A wound culture from a deep tissue infection shows growth on anaerobic media. The organism is a large, Gram-positive rod with 'double-zone' hemolysis on blood agar. What is the most likely pathogen?

🩺 Q125: Which organism is known for its ability to grow at 4°C, making it a potential contaminant in cold-stored blood products?

🩺 Q126: In the diagnosis of Hepatitis B, which marker is the first to appear in the serum and indicates active viral replication?

🩺 Q127: A sputum sample shows Gram-positive cocci in pairs and chains. The organism is optochin-sensitive and bile-soluble. What is the identification?

🩺 Q128: A 45-year-old female presents with recurrent venous thrombosis. Laboratory testing reveals a normal Prothrombin Time (PT), a prolonged Activated Partial Thromboplastin Time (APTT) that fails to correct upon a 1:1 mixing study with normal plasma, and a low protein C activity. What is the mos

🩺 Q129: A patient's antibody screen is positive. The reaction is enhanced with enzymes (ficin/papain). Which antibody is most likely present?

🩺 Q130: A peripheral blood smear from a patient with severe anemia shows numerous schistocytes, helmet cells, and polychromasia. The patient's serum haptoglobin is undetectable, and the LDH is significantly elevated. Which of the following is the most appropriate next diagnostic step to confirm the

🩺 Q131: A patient experiences a sudden onset of fever, chills, and hypotension shortly after the start of a red blood cell transfusion. What is the most likely cause?

🩺 Q131: A 60-year-old male exhibits a persistent lymphocytosis. Flow cytometry shows the cells are CD19+, CD20+ (dim), CD5+, and CD23+. Which condition is most consistent with this immunophenotype?

🩺 Q133: Which blood group phenotype is associated with the presence of anti-I in the serum?

🩺 Q133: A patient with suspected myelodysplastic syndrome (MDS) shows neutrophils with 'pseudo-Pelger-Huet' anomaly. How does this morphology differ from the hereditary Pelger-Huet anomaly?