PA 2026 Study Guide Pathologists' Assistant
Certification Practice Questions Answer
Explanations Surgical Pathology Autopsy
Gross Examination Histology Laboratory
Preparation
SECTION 1: SURGICAL PATHOLOGY TECHNIQUES (Questions 1–30)
Question 1. What is the primary role of a Pathologists' Assistant in the pathology
laboratory?
A. Diagnosing diseases independently
B. Performing gross examination and dissection of specimens
C. Prescribing medications
D. Performing surgical procedures on patients
Answer: B. Performing gross examination and dissection of specimens
Rationale: Pathologists' Assistants primarily perform gross examination,
dissection, and preparation of surgical specimens for microscopic analysis under
the supervision of a pathologist.
Question 2. Which fixative is most commonly used for preserving surgical
pathology specimens?
A. Methanol
B. Ethanol
C. 10% neutral buffered formalin
D. Acetone
Answer: C. 10% neutral buffered formalin
Rationale: 10% neutral buffered formalin is the standard fixative in surgical
pathology because it effectively preserves tissue structure for histological
examination while maintaining appropriate pH for tissue morphology.
,Question 3. What is the primary purpose of gross examination in surgical
pathology?
A. To determine the exact diagnosis
B. To describe, measure, and dissect specimens for microscopic analysis
C. To perform molecular testing
D. To culture microorganisms
Answer: B. To describe, measure, and dissect specimens for microscopic
analysis
Rationale: Gross examination involves the systematic description, measurement,
orientation, and dissection of tissue specimens to select representative sections for
microscopic evaluation.
Question 4. When grossing a specimen for tumor margin assessment, what is the
most important consideration?
A. Tumor size only
B. Distance of tumor from surgical margins
C. Patient age
D. Specimen weight
Answer: B. Distance of tumor from surgical margins
Rationale: Margin assessment is critical for determining completeness of excision.
The distance between the tumor and the closest surgical margin directly impacts
staging and the need for additional therapy.
Question 5. Which of the following is a critical step before beginning gross
dissection of a specimen?
A. Immediately cutting the specimen
B. Verifying specimen identity and matching with requisition
C. Discarding the specimen container
D. Starting dictation without reviewing history
Answer: B. Verifying specimen identity and matching with requisition
,Rationale: Specimen identification verification is the first critical step to prevent
misidentification errors. The specimen container label must match the requisition
form and clinical history before dissection begins.
Question 6. What does the term "en face" margin mean in surgical pathology?
A. A margin taken perpendicular to the tumor
B. A margin taken parallel to the tumor surface
C. A margin taken from the deepest aspect
D. A margin taken randomly
Answer: B. A margin taken parallel to the tumor surface
Rationale: "En face" margins are taken parallel to the tissue surface, allowing
evaluation of the entire peripheral margin in a single section. This technique is
commonly used for skin excisions and some mucosal resections.
Question 7. Which specimen orientation technique is most appropriate for a skin
excision?
A. Inking margins with different colors
B. Placing in formalin without orientation
C. Freezing the specimen
D. Cutting randomly
Answer: A. Inking margins with different colors
Rationale: Inking different margins with distinct colors allows the pathologist to
identify specific margin locations on microscopic examination. This is essential for
accurate margin assessment in skin excisions.
Question 8. What is the purpose of serial sectioning in gross examination?
A. To reduce specimen size
B. To examine the entire specimen at regular intervals
C. To increase fixation time
D. To improve staining quality
, Answer: B. To examine the entire specimen at regular intervals
Rationale: Serial sectioning involves cutting the specimen at regular intervals
(e.g., every 2–3 mm) to systematically examine the entire specimen for focal
lesions. This ensures no significant pathology is missed.
Question 9. When grossing a colon resection for adenocarcinoma, what is the
minimum recommended number of lymph nodes to be recovered?
A. 3
B. 6
C. 12
D. 20
Answer: C. 12
Rationale: Current guidelines recommend recovery of at least 12 lymph nodes for
accurate staging of colon cancer. Adequate lymph node retrieval is critical for
determining nodal status and guiding adjuvant therapy.
Question 10. Which type of specimen is typically processed as a "gross only"
specimen?
A. Radical prostatectomy
B. Products of conception
C. Colon resection
D. Breast lumpectomy
Answer: B. Products of conception
Rationale: Products of conception are often processed as gross only when the
purpose is to confirm the presence of chorionic villi or fetal tissue. Representative
sections may be submitted if specific findings require microscopic evaluation.
Question 11. What is the appropriate action when a specimen is received without
formalin?
Certification Practice Questions Answer
Explanations Surgical Pathology Autopsy
Gross Examination Histology Laboratory
Preparation
SECTION 1: SURGICAL PATHOLOGY TECHNIQUES (Questions 1–30)
Question 1. What is the primary role of a Pathologists' Assistant in the pathology
laboratory?
A. Diagnosing diseases independently
B. Performing gross examination and dissection of specimens
C. Prescribing medications
D. Performing surgical procedures on patients
Answer: B. Performing gross examination and dissection of specimens
Rationale: Pathologists' Assistants primarily perform gross examination,
dissection, and preparation of surgical specimens for microscopic analysis under
the supervision of a pathologist.
Question 2. Which fixative is most commonly used for preserving surgical
pathology specimens?
A. Methanol
B. Ethanol
C. 10% neutral buffered formalin
D. Acetone
Answer: C. 10% neutral buffered formalin
Rationale: 10% neutral buffered formalin is the standard fixative in surgical
pathology because it effectively preserves tissue structure for histological
examination while maintaining appropriate pH for tissue morphology.
,Question 3. What is the primary purpose of gross examination in surgical
pathology?
A. To determine the exact diagnosis
B. To describe, measure, and dissect specimens for microscopic analysis
C. To perform molecular testing
D. To culture microorganisms
Answer: B. To describe, measure, and dissect specimens for microscopic
analysis
Rationale: Gross examination involves the systematic description, measurement,
orientation, and dissection of tissue specimens to select representative sections for
microscopic evaluation.
Question 4. When grossing a specimen for tumor margin assessment, what is the
most important consideration?
A. Tumor size only
B. Distance of tumor from surgical margins
C. Patient age
D. Specimen weight
Answer: B. Distance of tumor from surgical margins
Rationale: Margin assessment is critical for determining completeness of excision.
The distance between the tumor and the closest surgical margin directly impacts
staging and the need for additional therapy.
Question 5. Which of the following is a critical step before beginning gross
dissection of a specimen?
A. Immediately cutting the specimen
B. Verifying specimen identity and matching with requisition
C. Discarding the specimen container
D. Starting dictation without reviewing history
Answer: B. Verifying specimen identity and matching with requisition
,Rationale: Specimen identification verification is the first critical step to prevent
misidentification errors. The specimen container label must match the requisition
form and clinical history before dissection begins.
Question 6. What does the term "en face" margin mean in surgical pathology?
A. A margin taken perpendicular to the tumor
B. A margin taken parallel to the tumor surface
C. A margin taken from the deepest aspect
D. A margin taken randomly
Answer: B. A margin taken parallel to the tumor surface
Rationale: "En face" margins are taken parallel to the tissue surface, allowing
evaluation of the entire peripheral margin in a single section. This technique is
commonly used for skin excisions and some mucosal resections.
Question 7. Which specimen orientation technique is most appropriate for a skin
excision?
A. Inking margins with different colors
B. Placing in formalin without orientation
C. Freezing the specimen
D. Cutting randomly
Answer: A. Inking margins with different colors
Rationale: Inking different margins with distinct colors allows the pathologist to
identify specific margin locations on microscopic examination. This is essential for
accurate margin assessment in skin excisions.
Question 8. What is the purpose of serial sectioning in gross examination?
A. To reduce specimen size
B. To examine the entire specimen at regular intervals
C. To increase fixation time
D. To improve staining quality
, Answer: B. To examine the entire specimen at regular intervals
Rationale: Serial sectioning involves cutting the specimen at regular intervals
(e.g., every 2–3 mm) to systematically examine the entire specimen for focal
lesions. This ensures no significant pathology is missed.
Question 9. When grossing a colon resection for adenocarcinoma, what is the
minimum recommended number of lymph nodes to be recovered?
A. 3
B. 6
C. 12
D. 20
Answer: C. 12
Rationale: Current guidelines recommend recovery of at least 12 lymph nodes for
accurate staging of colon cancer. Adequate lymph node retrieval is critical for
determining nodal status and guiding adjuvant therapy.
Question 10. Which type of specimen is typically processed as a "gross only"
specimen?
A. Radical prostatectomy
B. Products of conception
C. Colon resection
D. Breast lumpectomy
Answer: B. Products of conception
Rationale: Products of conception are often processed as gross only when the
purpose is to confirm the presence of chorionic villi or fetal tissue. Representative
sections may be submitted if specific findings require microscopic evaluation.
Question 11. What is the appropriate action when a specimen is received without
formalin?
