An autopsy report is a structured medical document, and once you understand how it’s organized, each section becomes much easier to follow. Most reports run 10 to 30 pages and follow a predictable format: identification details, external examination, internal examination, microscopic findings, toxicology results, and a final opinion on cause and manner of death. The two pieces of information most readers are looking for, cause and manner of death, typically appear on the first or last page.
How the Report Is Organized
Nearly every autopsy report opens with administrative details: the deceased person’s name, date of birth, date of death, the date the autopsy was performed, and the name of the pathologist who conducted it. You’ll also find a case number, which is useful if you ever need to request additional records or reference the case in legal proceedings.
After the administrative header, most reports include a brief clinical history. This section summarizes what was known before the autopsy began: medical conditions, medications, circumstances surrounding the death, and any information provided by law enforcement or hospital records. Reading this section first gives you context for everything that follows.
The body of the report then moves through several major sections in order:
- External examination: A head-to-toe description of the body’s surface, including height, weight, identifying marks, wounds, and signs of medical intervention.
- Internal examination: Organ-by-organ descriptions, weights, and any abnormalities found during dissection.
- Microscopic examination: Findings from tissue samples viewed under a microscope.
- Toxicology results: A list of substances detected in blood, urine, or other fluids, with concentrations.
- Opinion or final diagnoses: The pathologist’s conclusions, including cause and manner of death.
Cause of Death vs. Manner of Death
These two terms look similar but answer different questions, and confusing them is the most common mistake people make when reading an autopsy report.
The cause of death is the medical condition, disease, or injury that started the chain of events leading to death. It’s often listed in a layered format, starting with the immediate cause (what finally stopped the body from functioning) and working backward to the underlying cause (what set the process in motion). For example, an immediate cause might be a pulmonary embolism, with a contributing cause of a fractured hip from a fall two weeks earlier. The underlying cause, the fall, is what matters most for statistical and legal purposes.
The manner of death is a separate classification describing the circumstances. There are only five options: natural, accident, suicide, homicide, or undetermined. A “homicide” manner of death is a medical determination that someone else caused the death. It is not the same as a criminal charge. “Undetermined” means the pathologist couldn’t establish the circumstances with enough certainty to choose one of the other four categories.
Understanding the External Examination
This section reads like an extremely detailed physical description. The pathologist documents everything visible on the body’s surface: skin color, scars, tattoos, surgical incisions, needle marks, bruises, lacerations, and any signs of medical treatment like IV sites or defibrillator pad marks. Injuries are described with precise measurements and locations, often referenced by anatomical landmarks and distances from the top of the head or the soles of the feet.
You’ll also encounter descriptions of postmortem changes, the natural processes that begin after death. Three terms appear frequently. Livor mortis (also called lividity) refers to reddish-blue discoloration in the lowest parts of the body where blood settles by gravity. It starts appearing one to three hours after death and becomes fixed in place after six to eight hours, which helps investigators determine whether a body was moved. Rigor mortis is the stiffening of muscles, which typically begins one to two hours after death, fully develops by 12 hours, and fades around 36 hours. Algor mortis is the cooling of the body, measured by rectal temperature and used to estimate how long ago death occurred. When you see these terms in a report, they’re documenting the body’s condition at the time of examination to help establish a timeline.
Understanding the Internal Examination
The internal examination is usually the longest section and can feel overwhelming. The pathologist works through every major organ system, often in a standard order: brain, heart, lungs, liver, kidneys, spleen, gastrointestinal tract, and reproductive organs. For each organ, the report notes the weight (compared against normal ranges), color, texture, and any abnormalities.
Organ weights are one of the most useful details here. A significantly enlarged heart, for instance, points toward chronic high blood pressure or heart disease. A heavier-than-normal liver may indicate fatty liver disease or congestion from heart failure. The report typically doesn’t spell out what “normal” is, so you may need to look up standard organ weights for comparison. As a rough reference, a typical adult heart weighs around 250 to 350 grams, and a typical adult liver weighs around 1,200 to 1,500 grams.
This section also describes the condition of blood vessels (narrowing from plaque buildup, clots), the contents of the stomach (sometimes relevant for establishing a timeline), and the state of the airways. If there was trauma, you’ll find detailed descriptions of wound paths, including depth and which organs or structures were affected. Blunt-force injuries are described in terms of fracture patterns, internal bleeding, and tissue damage.
What the Microscopic Section Reveals
The microscopic examination looks at thin slices of tissue under magnification, and it often reveals things invisible during the hands-on portion of the autopsy. This section catches subtle but critical findings: tiny hemorrhages in the brain or lungs that indicate strangulation or blunt-force trauma even when external injuries are minimal, patterns of cell death in the heart muscle that confirm a heart attack, or early-stage diseases that hadn’t been diagnosed.
One particularly important use of microscopy is distinguishing injuries that happened before death from those that occurred after. Living tissue shows signs of healing, like inflammation and new blood vessel growth around a wound. Tissue that was injured after death shows none of these responses. This distinction matters enormously in forensic cases, and when you see it documented in the microscopic section, it’s the pathologist establishing a timeline of injuries.
The language in this section tends to be the most technical in the entire report. Terms like “acute inflammatory infiltrate,” “coagulative necrosis,” or “pulmonary edema” describe what the pathologist sees at the cellular level. In general, “necrosis” means tissue death, “edema” means fluid accumulation, “hemorrhage” means bleeding, “infiltrate” refers to cells that have moved into tissue as part of an inflammatory response, and “fibrosis” means scarring from older damage.
Reading the Toxicology Results
The toxicology section lists every substance detected in the body and its concentration, typically measured in nanograms per milliliter (ng/mL) of blood. You’ll see results for prescription medications, illicit drugs, alcohol, and sometimes common over-the-counter drugs. A substance being present doesn’t automatically mean it caused or contributed to death. The pathologist evaluates whether concentrations fall within therapeutic (normal use), toxic, or lethal ranges.
Interpreting postmortem drug levels is genuinely complicated, even for experts. After death, drugs can redistribute from organs back into the blood, artificially raising concentrations in ways that don’t reflect what was circulating at the time of death. This means a blood level that looks dangerously high on paper may have been within a normal range while the person was alive. A study of fentanyl-related deaths illustrates this challenge well: people who died from natural causes while on prescribed fentanyl had blood concentrations ranging from 1 to 78 ng/mL, while accidental overdose deaths ranged from 1 to 102 ng/mL. The ranges overlap significantly, which is why pathologists never rely on a single number. They weigh the toxicology against the clinical history, circumstances, and autopsy findings before concluding that a substance caused death.
If alcohol is listed, blood alcohol concentration (BAC) will appear as a percentage or in mg/dL. Postmortem alcohol can also be tricky because the body produces small amounts of alcohol naturally during decomposition, so low levels may not indicate the person was drinking.
The Final Opinion Section
This is where the pathologist ties everything together. The opinion section (sometimes labeled “final diagnoses” or “summary”) states the cause of death, the manner of death, and lists the major findings that support those conclusions. It’s written as a numbered list of diagnoses rather than a narrative.
If you’re reading the report primarily to understand why someone died, this section gives you the clearest answer. But reading the earlier sections in full helps you understand the reasoning behind it. A cause of death listed as “atherosclerotic cardiovascular disease” makes more sense once you’ve read the internal examination describing 90% blockage in the coronary arteries and the microscopic section showing old and new damage to the heart muscle.
Some reports include an addendum issued weeks or months after the initial autopsy. Addenda are common and usually contain toxicology results, specialized lab work, or revised opinions based on new information. If the report you’re reading feels incomplete, check whether an addendum was issued separately.
Getting a Copy of the Report
Autopsy reports are typically available to next of kin, legal representatives, and parties with a legitimate interest in the case. Processing times vary, but four to six months after the death is a common timeline, because the pathologist waits for all laboratory results before finalizing the document. You can request a copy by contacting the medical examiner’s or coroner’s office in the county where the death was investigated. Fees are modest, often around $50 for the autopsy report and $25 for additional related records. If the death is part of an active criminal investigation, access may be restricted until the case is resolved.