ASCP MLT MEDICAL LABORATORY TECHNICIAN CERTIFICATION EXAM /
ASCP MLT EXAM ACTUAL 2026/2027 HIGH YIELD PRACTICE QUESTIONS
AND STUDY GUIDE COMPLETE ACCURATE EXAM
1. A 42-year-old patient with fatigue, pallor, and exertional dyspnea has a CBC
showing hemoglobin 8.4 g/dL, MCV 68 fL, MCH decreased, and an
increased RDW. The peripheral smear demonstrates hypochromic
microcytes and occasional pencil cells. Which laboratory finding would most
strongly support iron deficiency anemia as the underlying cause?
A. Increased serum ferritin with decreased TIBC
B. Decreased serum ferritin with increased TIBC
C. Increased serum iron with decreased transferrin
D. Normal ferritin with markedly increased vitamin B12
Answer: B
2. A patient with suspected megaloblastic anemia has a hemoglobin
concentration of 9.2 g/dL and an MCV of 118 fL. The peripheral smear
demonstrates macro-ovalocytes and hypersegmented neutrophils. Which
additional laboratory result would most specifically support vitamin B12
deficiency rather than folate deficiency?
A. Increased methylmalonic acid
B. Decreased serum iron
C. Increased haptoglobin
D. Decreased lactate dehydrogenase
Answer: A
3. A laboratory technologist reviews a peripheral blood smear from a patient
with suspected hereditary spherocytosis. Numerous erythrocytes appear
smaller than normal and lack central pallor. Which additional test result
would be most consistent with this diagnosis?
A. Decreased reticulocyte production
B. Increased osmotic fragility
pg. 1
, C. Decreased unconjugated bilirubin
D. Increased serum haptoglobin
Answer: B
4. A patient presents with jaundice, dark urine, and anemia several days after
receiving a medication known to cause oxidative stress in susceptible
individuals. The blood smear demonstrates bite cells and Heinz bodies after
supravital staining. Which erythrocyte abnormality is most directly
associated with this laboratory pattern?
A. Deficiency of pyruvate kinase
B. Deficiency of glucose-6-phosphate dehydrogenase
C. Deficiency of factor VIII
D. Deficiency of spectrin
Answer: B
5. During evaluation of a patient with suspected acute leukemia, a peripheral
smear demonstrates numerous blasts containing needle-shaped, reddish-
purple cytoplasmic inclusions. Which diagnosis is most strongly associated
with this finding?
A. Acute lymphoblastic leukemia
B. Chronic lymphocytic leukemia
C. Acute myeloid leukemia
D. Chronic myeloid leukemia
Answer: C
6. A 55-year-old patient has persistent leukocytosis, splenomegaly, and a
differential showing granulocytes at many stages of maturation, including
myelocytes, metamyelocytes, and neutrophils. Basophils are increased.
Which finding would provide strong laboratory support for chronic myeloid
leukemia?
A. BCR-ABL1 fusion
B. JAK2 deletion
pg. 2
, C. Factor V Leiden mutation
D. PML-RARA absence
Answer: A
7. A patient with suspected disseminated intravascular coagulation has
prolonged PT and aPTT, decreased fibrinogen, thrombocytopenia, and
markedly increased D-dimer. Which laboratory result best reflects increased
fibrin formation and subsequent breakdown?
A. Decreased D-dimer
B. Increased D-dimer
C. Increased fibrinogen
D. Decreased thrombin activity
Answer: B
8. A patient develops petechiae and mucosal bleeding, while the platelet
count is 18 × 10⁹/L. PT and aPTT are within reference intervals. Which
disorder is most directly suggested by this isolated severe
thrombocytopenia?
A. Immune thrombocytopenia
B. Hemophilia A
C. Disseminated intravascular coagulation
D. Vitamin K deficiency
Answer: A
9. A patient has prolonged aPTT with a normal PT. A mixing study immediately
corrects the aPTT into the reference interval. Which interpretation is most
appropriate?
A. The result strongly suggests a coagulation factor deficiency
B. The result proves the patient has disseminated intravascular coagulation
C. The result indicates a platelet disorder
D. The result establishes the presence of a lupus anticoagulant
Answer: A
pg. 3
, 10. A patient has prolonged aPTT that fails to correct after mixing with normal
plasma. Which explanation should the technologist consider first?
A. Isolated factor VIII deficiency
B. Presence of an inhibitor
C. Severe thrombocytopenia
D. Increased fibrinogen concentration
Answer: B
11. A patient with suspected hemophilia A demonstrates a prolonged aPTT and
normal PT. Which coagulation factor is deficient in this disorder?
A. Factor VII
B. Factor VIII
C. Factor IX
D. Factor XIII
Answer: B
12. A patient develops thrombosis several days after exposure to
unfractionated heparin, accompanied by a substantial decrease in platelet
count. Which laboratory condition is most characteristic of heparin-induced
thrombocytopenia?
A. Antibodies against platelet factor 4-heparin complexes
B. Antibodies against red-cell glycophorin
C. Deficiency of von Willebrand factor
D. Autoantibodies against factor XIII
Answer: A
13. A blood smear from a patient with severe infection demonstrates toxic
granulation, Döhle bodies, and cytoplasmic vacuolization in neutrophils.
These findings most commonly represent which process?
A. Reactive neutrophil changes
B. Megaloblastic maturation
C. Platelet fragmentation
D. Erythrocyte membrane loss
pg. 4
ASCP MLT EXAM ACTUAL 2026/2027 HIGH YIELD PRACTICE QUESTIONS
AND STUDY GUIDE COMPLETE ACCURATE EXAM
1. A 42-year-old patient with fatigue, pallor, and exertional dyspnea has a CBC
showing hemoglobin 8.4 g/dL, MCV 68 fL, MCH decreased, and an
increased RDW. The peripheral smear demonstrates hypochromic
microcytes and occasional pencil cells. Which laboratory finding would most
strongly support iron deficiency anemia as the underlying cause?
A. Increased serum ferritin with decreased TIBC
B. Decreased serum ferritin with increased TIBC
C. Increased serum iron with decreased transferrin
D. Normal ferritin with markedly increased vitamin B12
Answer: B
2. A patient with suspected megaloblastic anemia has a hemoglobin
concentration of 9.2 g/dL and an MCV of 118 fL. The peripheral smear
demonstrates macro-ovalocytes and hypersegmented neutrophils. Which
additional laboratory result would most specifically support vitamin B12
deficiency rather than folate deficiency?
A. Increased methylmalonic acid
B. Decreased serum iron
C. Increased haptoglobin
D. Decreased lactate dehydrogenase
Answer: A
3. A laboratory technologist reviews a peripheral blood smear from a patient
with suspected hereditary spherocytosis. Numerous erythrocytes appear
smaller than normal and lack central pallor. Which additional test result
would be most consistent with this diagnosis?
A. Decreased reticulocyte production
B. Increased osmotic fragility
pg. 1
, C. Decreased unconjugated bilirubin
D. Increased serum haptoglobin
Answer: B
4. A patient presents with jaundice, dark urine, and anemia several days after
receiving a medication known to cause oxidative stress in susceptible
individuals. The blood smear demonstrates bite cells and Heinz bodies after
supravital staining. Which erythrocyte abnormality is most directly
associated with this laboratory pattern?
A. Deficiency of pyruvate kinase
B. Deficiency of glucose-6-phosphate dehydrogenase
C. Deficiency of factor VIII
D. Deficiency of spectrin
Answer: B
5. During evaluation of a patient with suspected acute leukemia, a peripheral
smear demonstrates numerous blasts containing needle-shaped, reddish-
purple cytoplasmic inclusions. Which diagnosis is most strongly associated
with this finding?
A. Acute lymphoblastic leukemia
B. Chronic lymphocytic leukemia
C. Acute myeloid leukemia
D. Chronic myeloid leukemia
Answer: C
6. A 55-year-old patient has persistent leukocytosis, splenomegaly, and a
differential showing granulocytes at many stages of maturation, including
myelocytes, metamyelocytes, and neutrophils. Basophils are increased.
Which finding would provide strong laboratory support for chronic myeloid
leukemia?
A. BCR-ABL1 fusion
B. JAK2 deletion
pg. 2
, C. Factor V Leiden mutation
D. PML-RARA absence
Answer: A
7. A patient with suspected disseminated intravascular coagulation has
prolonged PT and aPTT, decreased fibrinogen, thrombocytopenia, and
markedly increased D-dimer. Which laboratory result best reflects increased
fibrin formation and subsequent breakdown?
A. Decreased D-dimer
B. Increased D-dimer
C. Increased fibrinogen
D. Decreased thrombin activity
Answer: B
8. A patient develops petechiae and mucosal bleeding, while the platelet
count is 18 × 10⁹/L. PT and aPTT are within reference intervals. Which
disorder is most directly suggested by this isolated severe
thrombocytopenia?
A. Immune thrombocytopenia
B. Hemophilia A
C. Disseminated intravascular coagulation
D. Vitamin K deficiency
Answer: A
9. A patient has prolonged aPTT with a normal PT. A mixing study immediately
corrects the aPTT into the reference interval. Which interpretation is most
appropriate?
A. The result strongly suggests a coagulation factor deficiency
B. The result proves the patient has disseminated intravascular coagulation
C. The result indicates a platelet disorder
D. The result establishes the presence of a lupus anticoagulant
Answer: A
pg. 3
, 10. A patient has prolonged aPTT that fails to correct after mixing with normal
plasma. Which explanation should the technologist consider first?
A. Isolated factor VIII deficiency
B. Presence of an inhibitor
C. Severe thrombocytopenia
D. Increased fibrinogen concentration
Answer: B
11. A patient with suspected hemophilia A demonstrates a prolonged aPTT and
normal PT. Which coagulation factor is deficient in this disorder?
A. Factor VII
B. Factor VIII
C. Factor IX
D. Factor XIII
Answer: B
12. A patient develops thrombosis several days after exposure to
unfractionated heparin, accompanied by a substantial decrease in platelet
count. Which laboratory condition is most characteristic of heparin-induced
thrombocytopenia?
A. Antibodies against platelet factor 4-heparin complexes
B. Antibodies against red-cell glycophorin
C. Deficiency of von Willebrand factor
D. Autoantibodies against factor XIII
Answer: A
13. A blood smear from a patient with severe infection demonstrates toxic
granulation, Döhle bodies, and cytoplasmic vacuolization in neutrophils.
These findings most commonly represent which process?
A. Reactive neutrophil changes
B. Megaloblastic maturation
C. Platelet fragmentation
D. Erythrocyte membrane loss
pg. 4
