Deep dive · OpenFootLab positioning · sourced. The at-risk foot is defined by a mechanism, not a diagnosis. Diabetes is the largest single cause — not the only one, and not a prerequisite.
A foot becomes high-risk through one (or more) of three mechanisms. None of them requires diabetes:
blister, seam, pebble, or pressure point becomes a wound before it's noticed.
and spreads.
interface concentrates pressure where skin can't tolerate it.
Diabetes is dangerous precisely because it can hit all three at once. But every one of these mechanisms has non-diabetic causes that produce the same at-risk foot and the same need for lifelong monitoring.
Two different denominators, both true, and the distinction is the whole point:
hospital discharges are dysvascular, and that share is rising. Diabetes drives most of it.
decades — tells a different story. Of the ~1.6 million Americans living with limb loss (projected to rise toward 3.6M+ by 2050), the causes are roughly 54% dysvascular, 45% trauma, <2% cancer. And over two-thirds of the dysvascular cases are diabetic — so a large slice of the dysvascular group is non-diabetic PAD. Net: well over half of people living with limb loss are not there because of diabetes.
Why the gap? Trauma amputees are young and live for 50+ years. They accumulate in the prevalent population. The person who will rely on foot care longest is often not diabetic — he's your car-accident archetype.
crush injuries, then domestic accidents.
surveillance, prosthetic/orthotic fit checks, scar and pressure management — and watching the remaining foot, which now carries extra load (contralateral overload is a documented new-ulcer risk).
per 100,000 at 10–19). A meaningful fraction still require amputation when limb-salvage isn't possible — a teenager with a lifetime of limb care ahead.
birth, never diabetes-related.
| Condition | Mechanism | Why lifelong foot care |
|---|---|---|
| Non-diabetic PAD / critical limb ischemia | Ischemia | Non-healing arterial ulcers, gangrene risk; lifelong vascular + wound surveillance |
| Traumatic (partial) amputation | Structure + often nerve | Residual limb + contralateral overload for decades |
| Chemotherapy-induced peripheral neuropathy (CIPN) | Neuropathy | ~52% of chemo patients affected; persists in a large share (~58% of breast-cancer survivors at ~5.6 yrs) → insensate feet in millions of survivors |
| Charcot-Marie-Tooth & hereditary neuropathies | Neuropathy + deformity | Most common inherited neuropathy (~1/2,500); high-arch/clawtoe deformity, insensate |
| Spinal cord injury | Neuropathy (insensate) | Pressure injury prevalence 23–39%; 37% rehospitalized for a pressure ulcer by year 20 |
| Spina bifida / myelomeningocele | Neuropathy (congenital) | Lifelong multi-system; insensate feet; foot pressure ulcers ~8.8% |
| Rheumatoid & inflammatory arthritis | Structure (deformity) | Foot involvement in 30–90%; foot ulcers in ~10% |
| Leprosy (Hansen's disease) | Neuropathy (insensate) | The leading cause of Charcot/insensate foot worldwide in endemic areas |
| Chronic kidney disease / dialysis | Ischemia + neuropathy | Independent driver of Charcot and non-healing wounds |
| Stroke / hemiplegia | Structure (altered gait/load) | Spastic foot, altered pressure, reduced self-inspection |
| Congenital insensitivity to pain, syringomyelia, syphilis, alcoholic neuropathy, B12 deficiency | Neuropathy | All documented non-diabetic causes of the neuropathic/Charcot foot |
| Venous insufficiency / lymphedema | Tissue integrity | Chronic leg/foot ulceration, lifelong skin care |
Two facts unify the whole list:
patient needs an external early-warning loop, exactly what a daily foot check provides.
oncologic, congenital, or diabetic — has a residual limb and a contralateral foot to watch for the rest of their life.
it's a foot-at-risk platform. Diabetes is the biggest single wedge, but the same insensate/ischemic/deformed-foot problem covers trauma amputees, CIPN cancer survivors, CMT, RA, SCI, spina bifida, leprosy, PAD, and every amputee's remaining foot.
drainage, discoloration, pressure/friction) and the escalation logic are condition-agnostic. Only the context changes — and the harness already loads that from Baseline/ / patient_baseline.json as free text, so a non-diabetic profile ("post-traumatic right partial foot amputation, 2026 MVA") drops in without code changes.
record is more valuable for a 25-year-old trauma amputee with 60 years ahead than for anyone.
FootLab watches it. You don't need to be diabetic."*
Not medical advice. Prevalence figures are cited from the linked literature and vary by population and method.