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. 2009 Nov 13:2:32.
doi: 10.1186/1757-1146-2-32.

Diagnostic imaging for chronic plantar heel pain: a systematic review and meta-analysis

Andrew M McMillan  1 , Karl B Landorf, Joanna T Barrett, Hylton B Menz, Adam R Bird
Affiliations

Diagnostic imaging for chronic plantar heel pain: a systematic review and meta-analysis

Andrew M McMillan et al. J Foot Ankle Res. .

Abstract

Background: Chronic plantar heel pain (CPHP) is a generalised term used to describe a range of undifferentiated conditions affecting the plantar heel. Plantar fasciitis is reported as the most common cause and the terms are frequently used interchangeably in the literature. Diagnostic imaging has been used by many researchers and practitioners to investigate the involvement of specific anatomical structures in CPHP. These observations help to explain the underlying pathology of the disorder, and are of benefit in forming an accurate diagnosis and targeted treatment plan. The purpose of this systematic review was to investigate the diagnostic imaging features associated with CPHP, and evaluate study findings by meta-analysis where appropriate.

Methods: Bibliographic databases including Medline, Embase, CINAHL, SportDiscus and The Cochrane Library were searched electronically on March 25, 2009. Eligible articles were required to report imaging findings in participants with CPHP unrelated to inflammatory arthritis, and to compare these findings with a control group. Methodological quality was evaluated by use of the Quality Index as described by Downs and Black. Meta-analysis of study data was conducted where appropriate.

Results: Plantar fascia thickness as measured by ultrasonography was the most widely reported imaging feature. Meta-analysis revealed that the plantar fascia of CPHP participants was 2.16 mm thicker than control participants (95% CI = 1.60 to 2.71 mm, P < 0.001) and that CPHP participants were more likely to have plantar fascia thickness values greater than 4.0 mm (OR = 105.11, 95% CI = 3.09 to 3577.28, P = 0.01). CPHP participants were also more likely to show radiographic evidence of subcalcaneal spur than control participants (OR = 8.52, 95% CI = 4.08 to 17.77, P < 0.001).

Conclusion: This systematic review has identified 23 studies investigating the diagnostic imaging appearance of the plantar fascia and inferior calcaneum in people with CPHP. Analysis of these studies found that people with CPHP are likely to have a thickened plantar fascia with associated fluid collection, and that thickness values >4.0 mm are diagnostic of plantar fasciitis. Additionally, subcalcaneal spur formation is strongly associated with pain beneath the heel.

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Figures

Figure 1
Figure 1
Forest plot of studies reporting the thickness of the proximal plantar fascia by ultrasonography.
Figure 2
Figure 2
Forest plot of studies reporting the thickness of the proximal plantar fascia by ultrasonography. Sub-group analysis: blinding versus no blinding of image assessor.
Figure 3
Figure 3
Funnel plot of studies reporting the thickness of the proximal plantar fascia by ultrasonography. Sub-group analysis: blinding versus no blinding of image assessor.
Figure 4
Figure 4
Forest plot of ultrasonography studies reporting proximal plantar fascia thickness values > 4.0 mm.
Figure 5
Figure 5
Forest plot of studies reporting the thickness of the proximal plantar fascia by MRI.
Figure 6
Figure 6
Forest plot of studies reporting hypoechogenicity of the proximal plantar fascia.
Figure 7
Figure 7
Forest plot of studies reporting evidence of plantar calcaneal spur by plain film x-ray.
Figure 8
Figure 8
Forest plot of studies reporting increased subcalcaneal radioisotope uptake. *Control group sample size not reported.
See this image and copyright information in PMC

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