Calcaneal Insufficiency Fracture: An Underrecognized Cause of Atraumatic Heel Pain in Older Adults

Background/Objectives: Calcaneal insufficiency fractures may be overlooked in older adults presenting with atraumatic heel-region pain because early radiographic findings can be absent or inconclusive. Evidence regarding how often these fractures are identified in routine outpatient practice remains limited. This study aimed to describe the observed frequency, diagnostic pathway, clinical characteristics, treatment, and documented clinical course of calcaneal insufficiency fractures in an orthopaedic outpatient cohort. Methods: We retrospectively reviewed consecutive patients aged 60 years or older who presented with atraumatic pain localised to the heel or calcaneal region between April 2012 and March 2020. All patients underwent initial plain radiography. Follow-up radiography and MRI were performed selectively when weight-bearing heel pain persisted, radiographic findings remained negative or equivocal, and clinical suspicion of an occult fracture remained. Observed fracture frequencies and exact 95% confidence intervals (CIs) were calculated. Results: Among 123 included patients, calcaneal insufficiency fractures were identified in 10, corresponding to an observed frequency of 8.1% (95% CI, 4.0–14.4%). Among 89 independently ambulatory patients, 9 fractures were identified, corresponding to an observed subgroup frequency of 10.1% (95% CI, 4.7–18.3%). These subgroup findings were descriptive and were not adjusted for potential confounders. All 10 fracture cases occurred in women, with a mean age of 78.4 years. Osteoporosis was newly identified in all fracture cases; the mean femoral-neck T-score was −3.42. Four fractures were identified on radiographic findings, whereas six required MRI to establish the diagnosis after radiographs remained negative or inconclusive. All cases were managed non-operatively. The mean interval from symptom onset to the first documented clinical improvement or resolution of heel pain was 28.4 days, and no displacement or subsequent surgical intervention was documented during the available follow-up. Conclusions: In this retrospective single-centre cohort, calcaneal insufficiency fractures were identified in a subset of older adults presenting with atraumatic heel-region pain. The observed frequencies should be interpreted as descriptive estimates rather than population prevalence figures. Calcaneal insufficiency fracture may be considered when focal heel pain persists despite normal or equivocal initial radiographs, with repeat radiography and MRI considered according to the clinical context. Prospective studies using standardised imaging and follow-up protocols are needed.