Evidence map›Paper›PMID 42647669›Full record

ArticleJBJS case connector2026

Isolated Flexor Hallucis Longus Weakness Caused by a Popliteal Ganglion Cyst Compressing the Tibial Nerve: A Case Report.

Yohei Yanagisawa, Yusuke Eda, Naoya Kikuchi, Tomoki Koide, Shiho Kajita, Chihana Takamori, Matsuoka Ryota, Yasuhiro Homma

Abstract readCase Reports
PubMed Full text at PMC Publisher
In one paragraph

Article in JBJS case connector, 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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0citing papers in PubMed
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1 · What the graph read from it

What it found

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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

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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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

8 authors.

Yohei YanagisawaDepartment of Emergency and Critical Care Medicine, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.ORCID 0000-0003-2171-0004
Yusuke EdaDepartment of Orthopaedic Surgery, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.ORCID 0000-0002-6153-9451
Naoya KikuchiDepartment of Orthopaedic Surgery, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.ORCID 0000-0001-7282-5878
Tomoki KoideDepartment of Orthopaedic Surgery, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.ORCID 0009-0003-3623-9304
Shiho KajitaDepartment of Orthopaedic Surgery, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.ORCID 0009-0004-0852-5685
Chihana TakamoriDepartment of Pathology, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.ORCID 0009-0004-5506-4906
Matsuoka RyotaDepartment of Pathology, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.ORCID 0000-0002-8887-1593
Yasuhiro HommaDepartment of Orthopaedic Surgery, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.ORCID 0000-0002-7891-3024

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

caseA 43-year-old woman presented with left foot numbness and progressive difficulty flexing the great toe. Examination revealed isolated flexor hallucis longus (FHL) weakness. Plain radiographs of the left knee showed no degenerative changes. MRI showed a multiloculated ganglion cyst in the left popliteal fossa with increased FHL signal intensity, suggestive of denervation edema. Cyst aspiration resulted in immediate FHL recovery, but the cyst recurred 3 months later, and complete recovery was achieved after surgical excision. At the 3-year follow-up, the patient remained symptom-free with full FHL strength (MMT 5/5) and no cyst recurrence.

conclusionAn extraneural popliteal ganglion cyst can cause selective fascicular compression of the tibial nerve, resulting in isolated FHL weakness, with durable functional recovery achievable through surgical excision.

Indexed as

Ganglion CystsMuscle WeaknessNerve Compression SyndromesPopliteal CystTibial NerveTibial NeuropathyAdultFemaleHumansMagnetic Resonance Imagingdenervation edemaentrapment neuropathyflexor hallucis longus weaknesspopliteal ganglion cysttibial nerve compression

Identifiers

PMID42647669
PMCPMC13506188

What OpenQuestion holds

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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.