Autopsy and Gross Pathology Practice Questions
20 free Autopsy and Gross Pathology practice questions for the USMLE Step 1. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
What is the primary purpose of an autopsy in a clinical setting?
- A Estimate time since death
- B Determine organ weights
- C Find cause and manner of death
- D Perform DNA analysis
Correct answer: Find cause and manner of death
A clinical autopsy examines external and internal organs to determine how and why a person died, defining the cause and manner of death.
Which of the following is typically the first step in a full autopsy procedure?
- A Dissection of internal organs
- B External examination of the body
- C Microscopic tissue sampling
- D Toxicology testing
Correct answer: External examination of the body
An external examination is performed first, documenting wounds, identifying marks, clothing, and other physical traits before internal dissection.
During a gross pathological examination, which characteristic is NOT routinely documented for a mass lesion?
- A Size and weight
- B Colour and consistency
- C Patient’s blood pressure history
- D Presence or absence of capsule
Correct answer: Patient’s blood pressure history
Gross pathology describes morphologic features such as size, shape, consistency, capsule, and cut surface, not clinical history like prior blood pressure.
Which term describes the cooling of the body after death as part of postmortem changes?
- A Rigor mortis
- B Algor mortis
- C Livor mortis
- D Putrefaction
Correct answer: Algor mortis
Algor mortis is the cooling of the body toward ambient temperature after death and is one of the classic early postmortem changes.
What does “livor mortis” refer to in autopsy and postmortem examination?
- A Postmortem stiffening of the muscles
- B Gravitational pooling of blood
- C Cooling of the body after death
- D Bacterial decomposition of tissues
Correct answer: Gravitational pooling of blood
Livor mortis (postmortem lividity) is the gravitational settling of blood in the dependent parts of the body after circulation stops, producing a characteristic skin discoloration.
Rigor mortis occurs because of which fundamental biochemical change in muscle cells after death?
- A ATP depletion preventing actin-myosin relaxation
- B Accumulation of lactic acid causing muscle spasm
- C Permanent cross-linking of collagen
- D Bacterial enzyme activity
Correct answer: ATP depletion preventing actin-myosin relaxation
After death ATP production ceases, so actin-myosin cross-bridges cannot detach and the muscles stiffen — the basis of rigor mortis.
Which of the following is considered a “late postmortem change” during decomposition?
- A Livor mortis
- B Algor mortis
- C Rigor mortis
- D Putrefaction
Correct answer: Putrefaction
After the early changes (algor, livor, rigor mortis), the body enters putrefaction and autolysis — the late decomposition processes seen grossly as tissue breakdown.
Which type of autopsy is particularly indicated when death is suspicious, sudden, or potentially involves criminal activity?
- A Clinical autopsy
- B Virtual autopsy
- C Forensic autopsy
- D Limited organ autopsy
Correct answer: Forensic autopsy
A forensic (medicolegal) autopsy is performed when legal questions arise, such as suspicious, sudden, or potentially criminal deaths.
During gross pathology examination, which finding suggests a malignancy rather than a benign lesion?
- A Well-circumscribed with a uniform cut-surface
- B Soft, uniformly homogeneous consistency
- C Infiltrative borders with necrosis
- D Small, well-defined lesion under 1 cm
Correct answer: Infiltrative borders with necrosis
Malignant lesions typically show irregular, infiltrative borders with areas of necrosis and hemorrhage and a variegated cut surface, unlike well-circumscribed benign lesions.
Which documentation becomes part of the deceased’s medical record following an autopsy in a hospital setting?
- A Only external photographs of the body
- B Report of gross and histologic findings
- C Only the cause-of-death statement
- D Only the recorded organ weights
Correct answer: Report of gross and histologic findings
A complete autopsy report — covering gross, microscopic, and ancillary findings — becomes part of the medical record and helps clarify the cause of death.
Which of the following is NOT typically part of the gross pathology (grossing) process of a resected specimen?
- A Measuring lesion dimensions
- B Recording cut surface appearance
- C Performing DNA sequencing
- D Describing consistency of tissue
Correct answer: Performing DNA sequencing
Grossing involves macroscopic description — size, shape, colour, consistency, and cut surface — not molecular testing such as DNA sequencing, which is a separate laboratory study.
What is the significance of postmortem changes such as rigor mortis, livor mortis, and algor mortis during a forensic autopsy?
- A They confirm the cause of death
- B They help estimate the time since death
- C They identify the perpetrator involved
- D They classify the manner of death
Correct answer: They help estimate the time since death
The classic early postmortem changes help estimate the post-mortem interval (time since death), which is often critical in forensic investigations.
If during external examination, a body shows bruises but livor mortis staining is inconsistent with those bruise locations, this suggests what possibility?
- A Bruises are postmortem discoloration
- B Body was moved after death
- C Livor mortis is not useful
- D Bruises are superficial only
Correct answer: Body was moved after death
If the distribution of lividity does not match the bruises or body position, it can indicate the body was repositioned after death — a red flag in forensic examination.
What does a “limited autopsy” refer to?
- A Autopsy using only imaging (virtopsy)
- B Partial examination of selected organs
- C Autopsy performed without histology
- D Autopsy performed without external exam
Correct answer: Partial examination of selected organs
In a limited autopsy, consent covers only a partial examination — certain organs rather than a full dissection.
Which of the following is TRUE regarding gross pathology (grossing) in surgical specimens?
- A Microscopic confirmation is unnecessary if gross features are classic
- B Gross description must include site, size, appearance, and cut-surface
- C Only abnormalities are described; normal tissue is ignored
- D Grossing is optional in modern pathology practice
Correct answer: Gross description must include site, size, appearance, and cut-surface
Gross examination requires detailed, systematic documentation of site, size, shape, consistency, and cut-surface as the foundation for subsequent histologic analysis.
Which postmortem change is expected first after death under normal environmental conditions?
- A Putrefaction
- B Rigor mortis
- C Livor mortis
- D Algor mortis
Correct answer: Algor mortis
Algor mortis — cooling of the body — begins almost immediately after death as heat production ceases, preceding the other postmortem signs.
Which stage of decomposition involves bacterial putrefaction, bloating, skin discoloration and tissue breakdown visible grossly?
- A Immediate
- B Early postmortem
- C Late postmortem
- D Supravital reactions
Correct answer: Late postmortem
Late postmortem changes include putrefaction (bacterial decomposition), producing gross alterations such as bloating, discolouration, and liquefaction that indicate advanced decomposition.
Which term refers to a non-invasive alternative to traditional autopsy that uses imaging techniques instead of dissection?
- A Necropsy
- B Virtopsy
- C Grossing
- D Histopathology
Correct answer: Virtopsy
Virtopsy uses CT, MRI, and 3D scanning to examine a body after death without dissection — an emerging alternative to the traditional autopsy.
Why is organ weighing part of a full autopsy gross examination?
- A To help determine the age of the deceased
- B To compare against standard reference weights
- C To document past surgical history
- D To help slow tissue decomposition
Correct answer: To compare against standard reference weights
Weighing organs helps detect abnormalities such as hypertrophy, atrophy, or congestion by comparison with standard reference weights.
Which of the following is considered a limitation of gross pathology (grossing) alone without microscopic analysis?
- A Cannot detect small tumors or early cellular change
- B Requires expensive specialized laboratory equipment
- C Is generally too time-consuming to perform
- D Cannot document the overall organ shape
Correct answer: Cannot detect small tumors or early cellular change
Gross examination reveals only macroscopic change; microscopic (histologic) analysis is needed to detect small lesions and early cellular pathology not visible to the naked eye.