COMLEX Level 3 2026-2027 Board
Review: 130 High-Yield Practice Questions
& Answers – OMM, Biostats, Clinical
Medicine
Description:
Master the COMLEX Level 3 with 130 board-style questions covering OMM,
biostatistics, and high-yield clinical topics for 2026-2027. Includes detailed explanations
and updated USPSTF guidelines.
Download the complete 2026/2027 exam prep guide now – pass with confidence!
, COMLEX Level 3 2026-2027: 130 Qs & Answers
Section 1: Hematology and Coagulation Disorders
Question 1
A 45-year-old woman presents with easy bruising and menorrhagia. Laboratory evaluation
reveals normal PT, elevated PTT, elevated bleeding time, and normal platelet count. Which
of the following is the most likely diagnosis?
A. Hemophilia A
B. Vitamin C deficiency
C. Von Willebrand disease
D. Disseminated intravascular coagulation
Answer: C
Explanation: Von Willebrand disease is the most common inherited bleeding disorder,
transmitted as an autosomal dominant trait. It affects platelet binding and serves as a carrier
protein for factor VIII, explaining the elevated PTT and bleeding time with normal PT and
platelet count.
Question 2
A 32-year-old man with no significant medical history presents with prolonged bleeding after
a dental extraction. Coagulation studies show normal PT, elevated PTT, normal bleeding
time, and normal platelet count. Which factor deficiency is most consistent with this
presentation?
A. Factor VII deficiency
B. Factor VIII deficiency
C. Von Willebrand factor deficiency
D. Factor XIII deficiency
Answer: B
Explanation: Hemophilia A (Factor VIII deficiency) affects the intrinsic pathway, resulting
in isolated PTT elevation. The normal PT, bleeding time, and platelet count help distinguish
it from von Willebrand disease and other bleeding disorders.
,Question 3
A 68-year-old patient with metastatic breast cancer develops widespread petechiae and
bleeding from IV sites. Laboratory findings include elevated PT, elevated PTT, elevated
bleeding time, and thrombocytopenia. What is the most likely diagnosis?
A. Hemophilia A
B. Immune thrombocytopenic purpura
C. Disseminated intravascular coagulation
D. Vitamin K deficiency
Answer: C
Explanation: Disseminated intravascular coagulation presents with concurrent abnormalities
in all coagulation parameters due to widespread activation of coagulation and subsequent
consumption of clotting factors and platelets. This pattern in a patient with malignancy is
highly suggestive of DIC.
Question 4
A 4-year-old boy presents with bone pain, fatigue, and fever. Complete blood count reveals
neutropenia, anemia, and thrombocytopenia. Peripheral blood smear shows lymphoblasts.
Which demographic and presentation is most consistent with acute lymphoblastic leukemia?
A. Elderly male with asymptomatic leukocytosis
B. Middle-aged adult with splenomegaly and Philadelphia chromosome
C. Young child with bone marrow failure symptoms and blast cells
D. Older adult with Auer rods and notched nuclei
Answer: C
Explanation: Acute lymphoblastic leukemia most commonly affects children and presents
with symptoms of bone marrow failure including fatigue, pallor, fever, and bone pain. The
presence of lymphoblasts on smear confirms the diagnosis.
Question 5
A 52-year-old man presents with fatigue, night sweats, and splenomegaly. Complete blood
count shows marked leukocytosis with WBC >500,000/mm³. Cytogenetic analysis reveals the
Philadelphia chromosome. What is the most appropriate first-line treatment?
A. Rituximab
B. Imatinib
C. Allogeneic stem cell transplant
, D. Cladribine
Answer: B
Explanation: Chronic myeloid leukemia is characterized by the bcr-abl translocation
forming the Philadelphia chromosome. First-line treatment is imatinib, a tyrosine kinase
inhibitor that targets bcr-abl and leads to hematologic and cytogenetic remission.
Question 6
A 65-year-old man is found to have a leukocyte count of 58,000/mm³ during a routine
examination. He is asymptomatic. Physical examination reveals no lymphadenopathy or
organomegaly. What is the most likely diagnosis?
A. Acute myeloid leukemia
B. Chronic lymphocytic leukemia
C. Chronic myeloid leukemia
D. Hairy cell leukemia
Answer: B
Explanation: Chronic lymphocytic leukemia typically presents in older adults as an
incidental finding of asymptomatic lymphocytosis. It is the most common leukemia in
Western populations and may remain indolent for years.
Question 7
Which translocation is classically associated with Burkitt lymphoma?
A. t(11;22)(q24;q12)
B. t(14;18)(q32;q21)
C. t(8;14)(q24;q32)
D. t(11;14)(q13;q32)
Answer: C
Explanation: Burkitt lymphoma is associated with the t(8;14) translocation involving the c-
myc oncogene. This translocation leads to dysregulation of cell proliferation and is
characteristic of this aggressive B-cell lymphoma.
Question 8
A 58-year-old man with hairy cell leukemia is scheduled to undergo bone marrow biopsy.
Which finding is most characteristic of this condition?
A. Hypercellular marrow with abundant blasts
B. Dry tap due to marrow fibrosis
Review: 130 High-Yield Practice Questions
& Answers – OMM, Biostats, Clinical
Medicine
Description:
Master the COMLEX Level 3 with 130 board-style questions covering OMM,
biostatistics, and high-yield clinical topics for 2026-2027. Includes detailed explanations
and updated USPSTF guidelines.
Download the complete 2026/2027 exam prep guide now – pass with confidence!
, COMLEX Level 3 2026-2027: 130 Qs & Answers
Section 1: Hematology and Coagulation Disorders
Question 1
A 45-year-old woman presents with easy bruising and menorrhagia. Laboratory evaluation
reveals normal PT, elevated PTT, elevated bleeding time, and normal platelet count. Which
of the following is the most likely diagnosis?
A. Hemophilia A
B. Vitamin C deficiency
C. Von Willebrand disease
D. Disseminated intravascular coagulation
Answer: C
Explanation: Von Willebrand disease is the most common inherited bleeding disorder,
transmitted as an autosomal dominant trait. It affects platelet binding and serves as a carrier
protein for factor VIII, explaining the elevated PTT and bleeding time with normal PT and
platelet count.
Question 2
A 32-year-old man with no significant medical history presents with prolonged bleeding after
a dental extraction. Coagulation studies show normal PT, elevated PTT, normal bleeding
time, and normal platelet count. Which factor deficiency is most consistent with this
presentation?
A. Factor VII deficiency
B. Factor VIII deficiency
C. Von Willebrand factor deficiency
D. Factor XIII deficiency
Answer: B
Explanation: Hemophilia A (Factor VIII deficiency) affects the intrinsic pathway, resulting
in isolated PTT elevation. The normal PT, bleeding time, and platelet count help distinguish
it from von Willebrand disease and other bleeding disorders.
,Question 3
A 68-year-old patient with metastatic breast cancer develops widespread petechiae and
bleeding from IV sites. Laboratory findings include elevated PT, elevated PTT, elevated
bleeding time, and thrombocytopenia. What is the most likely diagnosis?
A. Hemophilia A
B. Immune thrombocytopenic purpura
C. Disseminated intravascular coagulation
D. Vitamin K deficiency
Answer: C
Explanation: Disseminated intravascular coagulation presents with concurrent abnormalities
in all coagulation parameters due to widespread activation of coagulation and subsequent
consumption of clotting factors and platelets. This pattern in a patient with malignancy is
highly suggestive of DIC.
Question 4
A 4-year-old boy presents with bone pain, fatigue, and fever. Complete blood count reveals
neutropenia, anemia, and thrombocytopenia. Peripheral blood smear shows lymphoblasts.
Which demographic and presentation is most consistent with acute lymphoblastic leukemia?
A. Elderly male with asymptomatic leukocytosis
B. Middle-aged adult with splenomegaly and Philadelphia chromosome
C. Young child with bone marrow failure symptoms and blast cells
D. Older adult with Auer rods and notched nuclei
Answer: C
Explanation: Acute lymphoblastic leukemia most commonly affects children and presents
with symptoms of bone marrow failure including fatigue, pallor, fever, and bone pain. The
presence of lymphoblasts on smear confirms the diagnosis.
Question 5
A 52-year-old man presents with fatigue, night sweats, and splenomegaly. Complete blood
count shows marked leukocytosis with WBC >500,000/mm³. Cytogenetic analysis reveals the
Philadelphia chromosome. What is the most appropriate first-line treatment?
A. Rituximab
B. Imatinib
C. Allogeneic stem cell transplant
, D. Cladribine
Answer: B
Explanation: Chronic myeloid leukemia is characterized by the bcr-abl translocation
forming the Philadelphia chromosome. First-line treatment is imatinib, a tyrosine kinase
inhibitor that targets bcr-abl and leads to hematologic and cytogenetic remission.
Question 6
A 65-year-old man is found to have a leukocyte count of 58,000/mm³ during a routine
examination. He is asymptomatic. Physical examination reveals no lymphadenopathy or
organomegaly. What is the most likely diagnosis?
A. Acute myeloid leukemia
B. Chronic lymphocytic leukemia
C. Chronic myeloid leukemia
D. Hairy cell leukemia
Answer: B
Explanation: Chronic lymphocytic leukemia typically presents in older adults as an
incidental finding of asymptomatic lymphocytosis. It is the most common leukemia in
Western populations and may remain indolent for years.
Question 7
Which translocation is classically associated with Burkitt lymphoma?
A. t(11;22)(q24;q12)
B. t(14;18)(q32;q21)
C. t(8;14)(q24;q32)
D. t(11;14)(q13;q32)
Answer: C
Explanation: Burkitt lymphoma is associated with the t(8;14) translocation involving the c-
myc oncogene. This translocation leads to dysregulation of cell proliferation and is
characteristic of this aggressive B-cell lymphoma.
Question 8
A 58-year-old man with hairy cell leukemia is scheduled to undergo bone marrow biopsy.
Which finding is most characteristic of this condition?
A. Hypercellular marrow with abundant blasts
B. Dry tap due to marrow fibrosis
