🩺 Q304: An adult patient presents with a WBC count of 85,000/µL. The differential shows 60% segmented neutrophils, 20% bands, 10% metamyelocytes, 5% myelocytes, and 5% blasts. The LAP score is 5. What does this finding suggest?
Anonymous Quiz
6%
A) Leukemoid reaction
82%
B) Chronic Myeloid Leukemia (CML)
6%
C) Acute Myeloid Leukemia
6%
D) Severe bacterial infection
🩺 Q305: In a newborn screening program, a hemoglobin electrophoresis on cellulose acetate at pH 8.4 shows a band at the 'S' position and a band at the 'A' position. What is the most probable genotype?
Anonymous Quiz
19%
A) Hb SS
38%
B) Hb AS
6%
C) Hb SC
38%
D) Hb S-Beta Thalassemia
🩺 Q306: A patient on unfractionated heparin therapy requires monitoring. Which test is the most sensitive and appropriate for assessing the anticoagulant effect of this specific therapy?
Anonymous Quiz
13%
A) Prothrombin Time (PT)
87%
B) Activated Partial Thromboplastin Time (aPTT)
0%
C) Thrombin Time (TT)
0%
D) Bleeding Time
🩺 Q307: Which peripheral blood smear finding is pathognomonic for severe oxidative stress leading to G6PD deficiency?
Anonymous Quiz
31%
A) Howell-Jolly bodies
56%
Bite cells and blister cells
13%
C
0%
D
🩺 Q308: Which of the following conditions is associated with a 'Pancytopenia' and a hypocellular bone marrow biopsy?
Anonymous Quiz
7%
A) Myelodysplastic Syndrome
40%
B) Aplastic Anemia
53%
C) Acute Lymphoblastic Leukemia
0%
D) Polycythemia Vera
🩺 Q309: Which Factor is not part of the 'Prothrombin Group' and is not Vitamin K-dependent?
Anonymous Quiz
13%
A) Factor II
53%
B) Factor VII
0%
C) Factor IX
33%
D) Factor V
🩺 Q310: What is the primary mechanism of action for the anticoagulant EDTA in hematology specimens?
Anonymous Quiz
41%
A) Chelation of calcium
24%
B) Inhibition of thrombin
29%
C) Precipitation of fibrinogen
6%
D) Neutralization of Vitamin K
🩺 Q311: A patient with suspected hyperthyroidism has a low TSH and a high Free T4. What is the most likely diagnosis?
Anonymous Quiz
38%
A) Secondary hypothyroidism
63%
B) Primary hyperthyroidism
0%
C) Subclinical hypothyroidism
0%
D) Pituitary adenoma
🩺 Q312: According to the Friedewald formula, how is LDL-cholesterol calculated when the triglyceride level is less than 400 mg/dL?
Anonymous Quiz
7%
A) Total Cholesterol - (HDL + Triglycerides)
53%
B) Total Cholesterol - (HDL + VLDL)
27%
C) Total Cholesterol - (HDL + [Triglycerides / 2.2])
13%
D) Total Cholesterol - (HDL + [Triglycerides / 5])
🩺 Q313: A patient's serum creatinine is 2.5 mg/dL, and their 24-hour urine creatinine is 1.2 g/day. If the patient's urine volume is 1500 mL, what is the estimated creatinine clearance in mL/min?
Anonymous Quiz
23%
A) 33.3
69%
B) 45.2
0%
C) 55.5
8%
D) 62.4
🩺 Q314: A 32-year-old female presents with recurrent spontaneous abortions and a history of deep vein thrombosis. Laboratory results reveal a prolonged PTT that does not correct upon mixing with normal plasma. Which test is most appropriate to confirm the presence of a lupus anticoagulant?
Anonymous Quiz
15%
A) Platelet aggregation studies
69%
B) Dilute Russell Viper Venom Time (dRVVT)
15%
C) Factor VIII activity assay
0%
D) Thrombin Time
🩺 Q315: Which enzyme is most specific for liver disease and is typically elevated in obstructive jaundice?
Anonymous Quiz
14%
AST
29%
B) ALT
50%
C) Alkaline Phosphatase (ALP)
7%
D) LD
🩺 Q316: A patient with suspected hereditary spherocytosis undergoes an osmotic fragility test. After incubation at 37°C for 24 hours, the osmotic fragility is significantly increased. What is the molecular basis for this increased susceptibility to hemolysis?
Anonymous Quiz
8%
A) Deficiency of glucose-6-phosphate dehydrogenase
92%
B) Defect in the vertical linkage between the lipid bilayer and the cytoskeleton
0%
C) Mutation in the beta-globin chain causing hemoglobin polymerization
0%
D) Absence of CD55 and CD59 on the red cell membrane
🩺 Q317: A patient presents with a serum sodium of 120 mmol/L and serum osmolality of 295 mOsm/kg. What is the most likely cause of this 'pseudohyponatremia'?
Anonymous Quiz
0%
A) Severe hyperglycemia
38%
B) Congestive heart failure
54%
C) Syndrome of Inappropriate ADH (SIADH)
8%
D) Hypovolemia
🩺 Q318: A peripheral blood smear from a patient with fatigue and lymphadenopathy shows numerous cells with 'hairy' cytoplasmic projections. Tartrate-resistant acid phosphatase (TRAP) staining is positive. What is the diagnosis?
Anonymous Quiz
38%
A) Chronic Lymphocytic Leukemia
31%
B) Hairy Cell Leukemia
8%
C) Acute Myeloid Leukemia
23%
D) Large Granular Lymphocytic Leukemia
🩺 Q319: In serum protein electrophoresis (SPEP), which fraction is normally the most prominent and migrates closest to the anode?
Anonymous Quiz
8%
Alpha-1 globulins
67%
B) Alpha-2 globulins
8%
C) Beta globulins
17%
D) Albumin
🩺 Q320: A patient returns from a trip to Southeast Asia and presents with diarrhea. A stool O&P exam reveals large cysts (50-70 µm) with a prominent ciliary covering and a kidney-shaped macronucleus. What is the organism?
Anonymous Quiz
33%
A) Entamoeba histolytica
50%
B) Giardia duodenalis
17%
C) Balantidium coli
0%
Dientamoeba fragilis
🩺 Q320: A patient with suspected primary hyperaldosteronism exhibits hypertension and hypokalemia. Which test is the most appropriate initial screening tool?
Anonymous Quiz
64%
A) Plasma renin activity to aldosterone ratio
9%
B) 24-hour urine cortisol
27%
C) Serum TSH and Free T4
0%
D) Serum catecholamines
🩺 Q322: A 6-year-old child presents with a 'slapped cheek' rash. A laboratory test for parvovirus B19 is ordered. Which marker indicates past infection and immunity?
Anonymous Quiz
17%
A) IgM antibodies
17%
B) IgG antibodies
25%
C) Viral DNA by PCR
42%
D) Presence of viral capsid protein
🩺 Q322: In the Friedewald equation for calculating LDL cholesterol, which lipid fractions are required?
Anonymous Quiz
8%
A) Total Cholesterol, HDL, VLDL
62%
B) Total Cholesterol, HDL, Triglycerides
8%
C) HDL, Triglycerides, Chylomicrons
23%
D) Total Cholesterol, Triglycerides, Apolipoprotein B