Evidence map›Paper›PMID 39915338›Full record

ReviewOsteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA2025

Osteoclast in CRPS: an alleged guilty fully acquitted.

Massimo Varenna, Francesca Zucchi, Raffaele Di Taranto, Francesco Orsini, Chiara Crotti

Abstract readReview
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In one paragraph

Review in Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Massimo VarennaDepartment of Rheumatology and Medical Sciences, Bone Diseases Unit, ASST G. Pini-CTO, Milan, Italy. massimo.varenna@asst-pini-cto.it.ORCID http://orcid.org/0000-0002-8644-0909
Francesca ZucchiDepartment of Rheumatology and Medical Sciences, Bone Diseases Unit, ASST G. Pini-CTO, Milan, Italy.
Raffaele Di TarantoDepartment of Rheumatology and Medical Sciences, Bone Diseases Unit, ASST G. Pini-CTO, Milan, Italy.
Francesco OrsiniDepartment of Rheumatology and Medical Sciences, Bone Diseases Unit, ASST G. Pini-CTO, Milan, Italy.
Chiara CrottiDepartment of Rheumatology and Medical Sciences, Bone Diseases Unit, ASST G. Pini-CTO, Milan, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Contrary to popular belief, a recent study did not show increased osteoclastic activity in acute complex regional pain syndrome. Conversely, osteoblastic activity seems to be enhanced. The real meaning of diagnostic tools needs to be reassessed. Therefore, bisphosphonates act through mechanisms of action different from their anti-osteoclastic effect.

introductionBone tissue involvement is a widely acknowledged event in the course of complex regional pain syndrome (CRPS), and it is invariably depicted as "high turnover osteoporosis." This statement needs to be revised in light of a recent biochemical study on bone turnover markers and regulators in patients with early CRPS.

methodsThe real meaning of the findings arising from biochemical, radiological, and histopathological studies and the possible mechanism of action of parenteral bisphosphonates have been reviewed according to the bone metabolism derangement specific to this disease.

resultsConsistent with the results of the recent biochemical study, no reliable data emerge from diagnostic studies sustaining an increased osteoclastic activity. Conversely, osteoblastic activity seems to be enhanced for an increased Wnt signaling due to lower levels of Sclerostin and Dickkopf-1. These results may provide a different and alternative interpretation of previous diagnostic and therapeutic studies.

conclusionsFor the emerging role of bone in CRPS pathogenesis, these remarks could be useful for improving knowledge of the pathophysiology of the disease.

Indexed as

Complex Regional Pain SyndromesOsteoclastsBiomarkersBone Density Conservation AgentsBone RemodelingDiphosphonatesHumansOsteoporosisBiomarkersBone Density Conservation AgentsDiphosphonatesBisphosphonatesBoneBone markersCRPS-1Osteoclasts

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.