Minor amputation — removal of a toe, a ray, or part of the forefoot — is often described as a limb-saving success. The foot is preserved, the patient walks out of hospital, and the immediate threat of infection or gangrene is resolved. But the published outcome data tell a more complicated story. A minor amputation is not the end of a diabetic foot problem; it is the beginning of a high-risk phase that requires structured follow-up, deliberate pressure management, and rehabilitation. Understanding what happens in the months and years after partial foot amputation is essential for anyone involved in diabetes-related foot care.
How Often Does Further Amputation Follow?
The most comprehensive recent synthesis comes from Greenfield and colleagues, whose 2025 systematic review and meta-analysis in the Journal of Vascular Surgery pooled 46 studies covering 32,496 patients undergoing partial foot amputation. Progression to major amputation was estimated at 23% overall, though the rate varied sharply by level: 0%–10% after digital and single metatarsal amputation, 8%–54% after transmetatarsal amputation, and 11%–44% after midfoot procedures. Minor re-amputation occurred in 12%–33% of patients, and re-ulceration rates reached as high as 69% after transmetatarsal amputation.
Single-centre data align with these findings. Collins and colleagues followed 146 patients after index toe amputation at an Irish tertiary vascular unit and reported that 43.2% went on to a further ipsilateral minor or major amputation, with a median time to that second procedure of 36 months. Notably, 14.4% progressed to major amputation, and the rate did not differ between hallux and non-hallux index procedures. Five-year overall survival was 64.3%.
Why the Risk Persists
Three mechanisms drive this pattern. First, the underlying disease — peripheral neuropathy and, frequently, peripheral artery disease — is unchanged by the amputation itself. Second, removing part of the forefoot alters biomechanics: the remaining foot has less surface area over which to distribute load, and plantar pressure concentrates on the residual structures. Third, muscle imbalance after ray or transmetatarsal resection can produce equinus and progressive deformity, further increasing peak pressure at the amputation site.
Mortality After Partial Foot Amputation
Mortality following dysvascular amputation remains substantially higher than most patients or clinicians expect. Ward and colleagues, in a 2024 systematic review in Disability and Rehabilitation, synthesised 17 studies published between 2016 and 2024 and found proportionate mortality after partial foot amputation rising from 2.1% at 30 days to 13.9% at one year, 30.1% at three years, and 42.2% at five years. Critically, the authors noted that these figures have not improved compared with studies published before 2016. Greenfield’s meta-analysis produced a comparable one-year all-cause mortality estimate of 16%.
These numbers reflect systemic cardiovascular and renal disease rather than the foot lesion in isolation, which is why partial foot amputation is best understood as a marker of advanced multi-system disease requiring comprehensive medical management, not simply a local surgical event.
Rehabilitation and Modifiable Risk
Some post-amputation risk is modifiable. Imaoka and colleagues studied 129 patients who received inpatient physical therapy after minor amputation and found that 32.5% underwent re-amputation within an average follow-up of 6.2 months. On Cox proportional hazards analysis, three factors were independently associated with re-amputation: the need for haemodialysis, restricted ankle dorsiflexion range, and lower Functional Independence Measure ambulation scores. Ankle mobility and walking function are potentially addressable through targeted therapy, which supports structured rehabilitation as part of routine post-amputation care rather than an optional add-on.
Function also drives patient-reported outcomes. In a systematic review of quality of life after lower limb amputation for peripheral arterial occlusive disease, Davie-Smith and colleagues identified successful ambulation — with a prosthesis where applicable — as the single factor with the greatest positive influence on quality of life, while more proximal amputation levels were consistently associated with worse scores.
Footwear and Pressure Redistribution
The 2023 IWGDF prevention guideline recommends that people at moderate-to-high risk, a category that includes anyone with a previous amputation, receive therapeutic footwear with a demonstrated plantar pressure-relieving effect during walking, alongside education on foot self-care and consideration of foot skin temperature monitoring. For the partial foot, this typically means accommodative footwear with a filler and a rigid or rocker sole designed to limit forefoot loading and compensate for lost lever arm.
Clinical Summary
Minor amputation preserves the limb in the short term but leaves a foot at very high risk. Roughly one in three patients undergoes further amputation, re-ulceration is common — particularly after transmetatarsal procedures — and five-year mortality approaches 42%. Ankle mobility, ambulatory function, dialysis status, and pressure-relieving footwear are among the variables most closely linked to outcome. The evidence consistently points in one direction: the post-amputation period warrants the same intensity of surveillance, offloading, and multidisciplinary attention as the ulcer that preceded it.
References
- Greenfield SH, Samarth GM, McGregor AH, et al. A systematic review and meta-analysis on partial foot amputation in diabetic foot ulcers. Journal of Vascular Surgery. 2025;83(3):879–894.
- Collins PM, Joyce DP, O’Beirn ES, et al. Re-amputation and survival following toe amputation: outcome data from a tertiary referral centre. Irish Journal of Medical Science. 2022;191(3):1193–1199.
- Ward Z, Ridgewell E, Quigley M, Fatone S, Dillon MP. Proportionate mortality following dysvascular partial foot amputation and how this compares to transtibial amputation: a systematic review. Disability and Rehabilitation. 2025;47(3):549–559.
- Imaoka S, Sato K, Furukawa M, Okita M, Higashi T. Re-amputation in patients with diabetes-related minor amputations who underwent physical therapy during their hospitalization. Journal of Foot and Ankle Research. 2021;14(1):14.
- Davie-Smith F, Coulter E, Kennon B, Wyke S, Paul L. Factors influencing quality of life following lower limb amputation for peripheral arterial occlusive disease: a systematic review of the literature. Prosthetics and Orthotics International. 2017;41(6):537–547.
- Bus SA, Sacco ICN, Monteiro-Soares M, et al. Guidelines on the prevention of foot ulcers in persons with diabetes (IWGDF 2023 update). Diabetes/Metabolism Research and Reviews. 2024;40(3):e3651.
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