Evidence map›Paper›PMID 42137431›Full record

ArticleFoot & ankle orthopaedics2026

Percutaneous Zadek Osteotomy for Calcific Insertional Achilles Tendinopathy: An Exploratory Comparison of Outcomes With and Without Retrocalcaneal Calcification.

Dhivakaran Gengatharan, Inderjeet Singh Rikhraj, Hon Keng Pui Bryan, Eric Wei Liang Cher, Wen Xian Png

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Article in Foot & ankle orthopaedics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

5 authors.

Dhivakaran GengatharanDepartment of Orthopaedic Surgery, Sengkang General Hospital, Singapore.ORCID https://orcid.org/0000-0003-4341-9189
Inderjeet Singh RikhrajDepartment of Orthopaedic Surgery, Sengkang General Hospital, Singapore.
Hon Keng Pui BryanDepartment of Orthopaedic Surgery, Sengkang General Hospital, Singapore.ORCID https://orcid.org/0009-0008-6887-1984
Eric Wei Liang CherDepartment of Orthopaedic Surgery, Sengkang General Hospital, Singapore.
Wen Xian PngDepartment of Orthopaedic Surgery, Sengkang General Hospital, Singapore.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Calcific insertional Achilles tendinopathy (CIAT) may remain symptomatic despite prolonged nonoperative treatment. Minimally invasive (MIS) Zadek osteotomy unloads the Achilles insertion biomechanically, but whether calcific deposits require excision remains unclear. Methods: This exploratory comparative case series included 20 consecutive patients undergoing MIS Zadek osteotomy. Patients were grouped based on the presence (n = 10) or absence (n = 10) of calcification. Outcomes included visual analog scale (VAS) and European Foot & Ankle Society (EFAS) scores. Non-parametric statistical analysis was performed. Results: Both groups demonstrated substantial improvement, with median VAS decreasing from 7 (IQR 2) to 0 (IQR 1) at 1 year. EFAS scores improved from 12 (IQR 6) preoperatively to 24 (IQR 2) at final follow-up. With the numbers available, no significant between-group difference could be detected in VAS ( Conclusion: MIS Zadek osteotomy was associated with substantial clinical improvement regardless of calcification. Excision of calcific deposits may not be necessary in all cases, although larger studies are required. Level of Evidence: Level IV, case series.

Indexed as

Achilles tendonitisankle paincalcificationHaglundtendon disorders

Identifiers

PMID42137431
PMCPMC13168728

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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.