An autopsy is a thorough surgical examination of a body after death, performed to determine the cause and manner of death. It involves an external inspection of the body followed by internal dissection of organs, and it can also include laboratory testing of tissue and fluid samples. Autopsies serve two broad purposes: answering medical questions and answering legal ones.
Two Types of Autopsy
There are two main categories, and they differ in who orders them and why.
A clinical autopsy (sometimes called a hospital or pathological autopsy) is performed when doctors want to understand a disease that contributed to a patient’s death. Sometimes the cause of death was already established before the patient died, but the autopsy lets pathologists study the disease process directly in the body’s tissues. This kind of autopsy requires consent from the next of kin or a legal representative, and the family can specify limits on what is examined.
A forensic autopsy (also called a medicolegal autopsy) is ordered by a legal authority, such as a medical examiner or coroner, when the death is unexpected, violent, suspicious, or otherwise unexplained. The goals go beyond cause of death. Forensic autopsies also aim to establish the identity of the deceased, estimate time of death, collect trace evidence, and help reconstruct a crime scene. Family consent is not required for a forensic autopsy. Under these circumstances, the body is legally in the custody of the state.
Who Performs an Autopsy
Autopsies are carried out by pathologists, physicians who specialize in diagnosing disease through examination of tissues and fluids. In forensic cases, the pathologist typically has additional training in forensic pathology.
The person who orders a forensic autopsy varies by jurisdiction. In some areas, that authority is a medical examiner, an appointed physician with board certification in a medical specialty. In others, it’s a coroner, an elected official who often does not have medical training and may rely on a forensic pathologist to perform the actual examination. The key distinction: medical examiners are appointed based on qualifications, while coroners are elected.
What Happens During the Procedure
A complete autopsy has three main phases: external examination, internal examination, and laboratory analysis.
The external exam comes first. The pathologist inspects the body’s surface, noting injuries, scars, tattoos, and any other identifying marks. In forensic cases, clothing and accessories are also examined and documented as potential evidence.
For the internal examination, the pathologist makes an incision down the front of the torso to open the chest and abdominal cavities. The most common cut is a straight I-shaped incision, though Y-shaped incisions are also widely used. Through this opening, organs can be removed individually, taken out in groups (called “en bloc” removal), or even removed all at once as a single block. Each organ is weighed, inspected, and often sliced open to look for signs of disease or injury. To examine the brain, the pathologist makes a separate incision across the back of the scalp from one ear to the other, then removes and inspects the brain.
After the examination, organs are typically returned to the body and all incisions are sutured closed.
Laboratory Testing After the Autopsy
The physical dissection is only part of the picture. Pathologists routinely collect samples for further analysis in the lab. Tissue samples from organs like the brain, liver, and heart are preserved and examined under a microscope to identify disease at the cellular level.
Toxicology testing checks for drugs, alcohol, poisons, and medications. The fluids and tissues collected for this purpose can include blood drawn from several different sites (the heart, the femoral vein in the leg, or beneath the collarbone), as well as urine, bile, vitreous humor (the fluid inside the eye), gastric contents, and liver tissue. In some cases, more unusual specimens like bone marrow, muscle tissue, or skin from injection sites are also submitted. Using multiple collection sites helps pathologists distinguish between substances the person consumed and chemical changes that happen naturally after death.
Why Autopsies Still Matter
Even with modern diagnostic tools, autopsies catch mistakes that would otherwise go unnoticed. A large review by the Agency for Healthcare Research and Quality found that about 1 in 4 autopsies (roughly 24 to 26 percent) detected a major diagnostic error. In approximately 10 percent of cases, the autopsy revealed a misdiagnosis significant enough that it may have changed the patient’s outcome if caught in time. Even with improvements in medical imaging and lab testing, contemporary autopsies still detect these outcome-changing errors in roughly 4 to 8 percent of cases.
Those numbers matter beyond the individual case. When autopsies reveal patterns of missed diagnoses, hospitals can adjust their practices. For families, an autopsy can also uncover genetic conditions that surviving relatives should know about.
Virtual Autopsies and Post-Mortem Imaging
Some institutions now use CT scans and MRI performed after death as a supplement or, in limited cases, an alternative to a traditional autopsy. A prospective study of 120 hospital deaths found that post-mortem imaging showed high accuracy (over 85 percent sensitivity) for certain conditions, including heart attacks and pulmonary embolism on MRI, pneumonia on CT, and aortic dissection and cancer spread on both. However, imaging could not reliably detect many other important findings, including sepsis, blood cancers, certain types of heart and liver damage, and small abnormalities in general. Post-mortem imaging works well as a screening tool or complement, but it cannot fully replace a hands-on autopsy.
Consent and Legal Rights
For a clinical autopsy, the legal next of kin must give permission. In the United States, custody of a person’s remains passes to the surviving spouse or closest relative, and that person has the authority to approve or refuse an autopsy. Any unauthorized dissection can be treated as mutilation and may carry civil or criminal consequences.
Forensic autopsies bypass this requirement. A medical examiner or coroner can authorize the procedure without family consent when it is performed in good faith and without negligence. All states permit autopsy in suspected criminal cases, though they vary on how much authority officials have in other circumstances.
Religious objections carry real legal weight in many states. New York law, for example, prohibits performing a dissection or autopsy over a family member’s religious objection unless there is a “compelling public necessity.” If the medical examiner believes the autopsy is essential despite an objection, they must go to court for an order authorizing it, and the family must be given at least 48 hours’ notice to file their own legal challenge. Several other states have similar protections.
How an Autopsy Affects Funeral Plans
One of the most common concerns families have is whether an autopsy will prevent an open-casket funeral. In the vast majority of cases, it will not. All incisions made during the procedure are sutured closed afterward, and these closures can be concealed by clothing and standard casket arrangements during viewing. Funeral directors experienced in post-autopsy preparation can restore the body’s appearance effectively, so families should not feel they have to choose between getting answers and saying goodbye the way they planned.