Kennedy Terminal Ulcer: How Long Before Death?

A Kennedy Terminal Ulcer typically appears within days of death, and death usually follows within hours. In reviewed cases, the median time from when the wound was first identified to the patient’s death was 36 hours, and three out of four patients died within 72 hours of that first identification.¹ These wounds are not caused by poor nursing care or neglect. They are a sign that the body’s systems are shutting down, and recognizing one changes the conversation from treatment to comfort.

What a Kennedy Terminal Ulcer Looks Like

Kennedy Terminal Ulcers (KTUs) tend to appear suddenly and deteriorate fast. They most commonly show up on the sacrum, the bony area at the base of the spine just above the buttocks, though they can also develop on the buttocks, calves, arms, and elbows. Their shape is often distinctive: pear-shaped, butterfly-shaped, or horseshoe-shaped, with irregular borders. The skin color can range from yellow to purple to black, and the wound can worsen visibly over just a few hours.¹

That sudden onset is one of the features that sets a KTU apart from a standard pressure injury. A pressure injury develops over days or weeks from sustained pressure on the skin. A KTU can seem to appear out of nowhere, sometimes in as little as a few hours, even in patients receiving excellent repositioning and skin care. The wound may present on one side (unilateral) or on both sides (bilateral), and it progresses rapidly despite any intervention.

The Timeline From Appearance to Death

This is the question families and caregivers most urgently want answered: how much time is left? The data, drawn from case reports and retrospective reviews of end-of-life patients, points to a very short window. Half of patients died within 36 hours of the ulcer being first noticed, and 75% died within 72 hours.¹ Some patients survived longer, but the ulcer’s appearance generally signals that death is imminent, measured in hours to days rather than weeks.

It is worth being honest about the limits of these numbers. Much of the published literature on KTUs comes from case reports and small observational studies rather than large prospective trials. The 36-hour median and 72-hour figure are the best numbers available, but individual cases vary. Some patients have been reported to live a week or more after a KTU appears, while others die within hours. The ulcer is better understood as a strong signal that the dying process is actively underway than as a precise countdown clock.

Why These Ulcers Happen

The short answer is that the body is failing, and the skin fails along with it. The longer answer is that nobody is entirely sure of the precise mechanism. Research has identified significant gaps in understanding the pathophysiology of KTUs; current explanations are based on hypotheses rather than confirmed mechanisms.²

The leading hypothesis involves a cascade of organ failure that starves the skin of what it needs. As the heart weakens and blood pressure drops, circulation to the skin deteriorates. The tissues that are under the most pressure, like the sacrum in a bedridden patient, lose their already reduced blood supply first. Without adequate oxygen and nutrients, the skin tissue dies. Meanwhile, the kidneys and liver may be failing, meaning that waste products build up in the blood and further damage vulnerable tissue. The skin, being the body’s largest organ, essentially becomes the last organ to show what has already been happening internally for days.

One study investigating whether skin temperature changes could serve as an early marker for KTUs found that in the early stages, the affected skin remained at a normal temperature, suggesting the initial damage may be limited to tiny blood vessels beneath the skin’s surface before any visible wound appears.³ That finding is preliminary and needs more study, but it hints that by the time a KTU becomes visible, the underlying damage has been building for some time already.

How KTUs Differ From Pressure Injuries

The distinction between a Kennedy Terminal Ulcer and an ordinary pressure injury matters a great deal, both for the patient’s care plan and for the nursing facility’s reputation and finances. A pressure injury develops when sustained pressure on the skin cuts off circulation to that area, usually because a patient has been sitting or lying in the same position too long. It is, in principle, preventable with proper repositioning, mattress selection, and skin care. A KTU is not preventable. It arises from the body’s systemic shutdown, not from a localized failure of skin care.

The U.S. Centers for Medicare and Medicaid Services (CMS) recognizes this difference. When a clinician determines that a patient has a terminal ulcer, it is no longer coded as a pressure ulcer in the assessment system used by nursing facilities.⁴ This is not just a bureaucratic technicality. Nursing homes are penalized financially for hospital-acquired pressure injuries, so if a KTU is misclassified as a preventable pressure injury, the facility can face financial penalties for a wound that no amount of nursing care could have stopped.⁵

In practice, though, telling the two apart is not always easy. Both can appear on the sacrum. Both involve tissue breakdown. The key distinguishing features of a KTU are its sudden onset in a patient who is already in the dying process, its rapid progression, and its characteristic shape. A standard pressure injury typically starts as a small area of redness that worsens gradually, while a KTU can go from nothing to a large, dark wound in a matter of hours. Clinicians rely on the patient’s overall clinical trajectory as much as the wound’s appearance.

SCALE and the Broader Picture of Skin Failure at End of Life

The Kennedy Terminal Ulcer is actually one piece of a broader phenomenon. In the wound care field, several overlapping terms describe what happens to the skin as someone is dying: KTU, skin failure, SCALE (Skin Changes At Life’s End), and Trombley-Brennan Terminal Tissue Injury are all names that have been used, sometimes interchangeably and sometimes to describe slightly different presentations.²

SCALE is the broadest of these concepts. It describes a wide range of skin changes that can occur as a person is dying, not just ulcers. These changes include shifts in skin color and turgor (how firm or elastic the skin feels), mottled blood vessels visible through the skin, drops in skin temperature, and tissue breakdown that may involve incontinence-related damage, skin tears, or infections.⁶ Diminished blood flow to the skin can cause the extremities to feel cool or look mottled, and the skin may become more fragile overall. Most of these changes are unavoidable.

The terminology confusion can be frustrating for families and for clinicians alike. A wound care nurse might use “Kennedy Terminal Ulcer” to describe a specific sacral wound with a characteristic shape, while another might call the same wound a “skin failure lesion” or document it under “SCALE.” What all these terms share is a core recognition: that the skin of a dying person can break down in ways that standard wound prevention cannot stop, and that the primary goal shifts from healing the wound to keeping the patient comfortable.

What Families Should Know

If you are caring for a dying loved one and a dark wound suddenly appears on their back or buttocks, the natural reaction is alarm and, often, guilt. Families frequently ask whether something was missed, whether the person should have been turned more often, or whether the care facility did something wrong. In the case of a Kennedy Terminal Ulcer, the answer is almost certainly no. The wound is a consequence of the dying process itself, not a failure of care.

Understanding this matters for several reasons. First, it can relieve families of guilt that serves no one. Second, it provides a realistic signal about the timeline. When a healthcare provider identifies a wound as a KTU, they are communicating that the person is very close to death, usually within a day or two. This knowledge, however painful, gives family members a chance to gather, say what they need to say, and prepare.

The care approach once a KTU has appeared focuses entirely on comfort. Aggressive wound treatment, debridement (removing dead tissue), or frequent dressing changes can cause pain without any realistic hope of healing. The wound will not heal because the body no longer has the resources to repair tissue. Instead, care typically involves gentle wound coverings to manage any drainage, odor control if needed, pain management, and careful repositioning that prioritizes the patient’s comfort over a wound-prevention schedule.²

The Burden on Nurses and Caregivers

The emotional weight of Kennedy Terminal Ulcers falls heavily on the nurses and aides who provide direct care. Wound prevention is deeply embedded in nursing culture. Nurses are trained from their first clinical rotation that pressure injuries are a quality indicator, that they reflect the standard of care, and that they are largely avoidable. When a wound develops on their watch in a dying patient, the psychological response can be intense even when the nurse intellectually understands that the wound was unavoidable.

Research on this topic has emphasized the importance of communicating to nurses that not all skin breakdown can be prevented in dying patients, specifically to reduce the ethical stress and guilt that nurses experience.⁷ Facilities that educate their staff about KTUs and skin failure at end of life tend to have a healthier approach: nurses feel empowered to shift from “prevent at all costs” to “keep the patient comfortable,” and the documentation reflects an understanding of what is actually happening rather than a defensive attempt to prove the wound is not their fault.

This educational gap is not trivial. In facilities where Kennedy Terminal Ulcers are not well understood, nurses may escalate wound care aggressively in a dying patient, ordering specialty mattresses, increasing turning schedules to every hour, and applying wound treatments that cause discomfort. All of this effort does nothing to stop the wound from progressing and can actively make the patient’s final hours more miserable. When nurses understand what a KTU is, the care plan shifts in the right direction.

Documentation and Legal Implications

Proper documentation of a Kennedy Terminal Ulcer protects both the patient and the care facility. When a clinician identifies a wound as a KTU, the medical record should reflect the patient’s overall condition, the sudden onset of the wound, its appearance and progression, and the clinical reasoning for classifying it as a terminal ulcer rather than a preventable pressure injury. This documentation matters because nursing homes and hospitals are scrutinized for wound rates, and a KTU that gets counted as a regular pressure injury can result in penalties, lower quality ratings, and even litigation from families who do not understand what happened.

The misclassification problem runs in both directions. Some facilities may be tempted to label a genuine pressure injury as a KTU to avoid accountability. This is why the patient’s overall clinical trajectory is so important. A KTU diagnosis is appropriate when the patient is clearly in the active dying process, typically already enrolled in hospice or identified as end-of-life, and the wound appeared suddenly and is progressing rapidly. If the patient is not imminently dying, the wound is probably not a KTU, and calling it one to dodge a quality metric is both dishonest and potentially harmful.

Families who are concerned about a wound that appeared in a care facility can ask straightforward questions: When was this wound first noticed? Was the patient being repositioned on schedule? Is the patient actively dying? A genuine KTU will have clear documentation of sudden onset in a patient whose overall condition is declining rapidly. Thoughtful facilities will also have communicated with the family proactively, letting them know that skin changes are a normal part of the dying process before the wound even appears.

Why the Science Remains Thin

Given how frequently end-of-life skin breakdown occurs, it is surprising how little rigorous research exists on KTUs. Much of the published literature consists of case reports, expert opinion articles, and small retrospective reviews. Large prospective studies are essentially nonexistent, and there is no universally agreed-upon diagnostic criterion for distinguishing a KTU from other forms of end-of-life skin damage.

There are understandable reasons for this. Patients who develop KTUs are, by definition, in the final hours or days of life. Enrolling them in research studies raises ethical questions about consent and about adding any burden to their final experience. Tissue biopsies that might reveal the cellular mechanism of KTUs are rarely performed because doing so would cause pain without any clinical benefit to the patient. The result is that the science remains largely descriptive. Clinicians recognize the pattern, experienced wound care specialists can identify a KTU at the bedside with reasonable confidence, and researchers continue to hypothesize about the underlying mechanism, but hard evidence at the cellular level is scarce.²

The skin temperature research mentioned earlier represents one attempt to find an objective, noninvasive marker. If future studies confirm that microvascular changes precede the visible wound, thermal imaging or similar tools could someday help clinicians identify KTUs before they become visible, giving families even earlier warning. But that work is in its infancy, and for now, clinicians rely on visual assessment and clinical judgment.³

When a Wound Is Not a Kennedy Terminal Ulcer

Not every wound that appears on a dying patient is a KTU. People at the end of life are vulnerable to a whole range of skin problems. Incontinence-related moisture damage can erode skin quickly. Skin tears from fragile, paper-thin skin are common in elderly patients. Fungal infections, medication-related skin reactions, and ordinary pressure injuries from immobility all occur alongside the dying process. The presence of a terminal illness does not automatically make every wound a terminal ulcer.

The distinguishing features to watch for are the combination of sudden onset, rapid deterioration, and location on a bony prominence (especially the sacrum) in a patient whose overall condition is clearly declining. A wound that has been slowly worsening for two weeks is more likely a pressure injury than a KTU. A wound that appeared on a patient who is not otherwise showing signs of imminent death deserves investigation rather than a presumptive KTU label. And skin damage that clearly correlates with incontinence or a medical device should be documented as what it is, even if the patient is terminally ill.

For families, the practical takeaway is this: if a wound appears suddenly on your loved one who is already visibly declining, and the care team tells you it is a Kennedy Terminal Ulcer, that assessment aligns with a recognized pattern. If a wound has been developing gradually, or if you have concerns that repositioning or basic skin care was not happening, those are legitimate questions to raise regardless of the patient’s prognosis. The two situations call for very different responses, and telling them apart matters.

1
PubMed Central. Terminal ulcers in end-of-life care: a scoping review
2
PubMed. Kennedy terminal ulcer and other skin wounds at the end of life: An integrative review
3
PubMed. Early Skin Temperature Characteristics of the Kennedy Lesion (Kennedy Terminal Ulcer)
4
Advances in Skin & Wound Care. Reexamining the Literature on Terminal Ulcers, SCALE, Skin Failure, and Unavoidable Pressure Injuries
5
Journal of Hospice & Palliative Nursing. Kennedy Terminal Ulcers: A Scoping Review
6
Advances in Skin & Wound Care. Terminal Ulcers, SCALE, Skin Failure, and Unavoidable Pressure Injuries: Results of the 2019 Terminology Survey
7
PubMed Central. Unavoidable pressure ulcers at the end of life and nurse understanding