Evidence map›Paper›PMID 40442572›Full record

ArticleOrthopaedic surgery2025

Trapdoor Procedure for Benign Bone Lesions in the Femoral Head of Skeletally Immature Children.

Qichao Ma, Fangchun Jin, Taichun Li, Honghong Pei, Yichen Wang, Yi Luo, Ziming Zhang

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Orthopaedic surgery, 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. Article
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

7 authors.

Qichao MaDepartment of Orthopedics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China.ORCID https://orcid.org/0000-0003-2406-1900
Fangchun JinDepartment of Pediatric Orthopedics, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
Taichun LiDepartment of Orthopedics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China.
Honghong PeiDepartment of Orthopedics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China.
Yichen WangDepartment of Orthopedics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China.
Yi LuoDepartment of Orthopedics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China.ORCID https://orcid.org/0000-0003-0928-9923
Ziming ZhangDepartment of Orthopedics, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China.

Funding

Shanghai Health Care Commission Clinical Research Special Project for Health Industry 202240106Xinhua Hospital Institutional Clinical Research Innovation Project 23XHCR13C
6 · The paper itself

Abstract

objectiveBenign bone lesions involving the femoral head are common in pediatric populations but pose significant challenges due to anatomical complexity and the need to preserve growth plate integrity. This study aims to evaluate the efficacy of the trapdoor procedure in treating these lesions in skeletally immature patients.

methodsFrom 2013 to 2023, five pediatric patients with femoral head bone lesions were identified who underwent the trapdoor procedure retrospectively. Preoperative assessments included computed tomography (CT) and magnetic resonance imaging (MRI). Follow-up spanned a mean of 37.8 ± 11.2 months, with attention to pathology, recurrence, and complications. Functional outcomes were assessed using the McKay clinical grading method.

resultsHistological examination postoperatively confirmed Langerhans cell histiocytosis (LCH) in two patients and chondroblastoma in two others. One patient's diagnosis remained unclear, indicating only fibrous tissue cell proliferation. No recurrences were observed, but avascular necrosis (AVN) occurred in both LCH patients, necessitating revision surgery.

conclusionsThe trapdoor procedure is a safe and effective method for treating benign bone lesions of the femoral head in children, with attention needed for the potential of AVN.

Indexed as

ChondroblastomaFemoral NeoplasmsFemur HeadHistiocytosis, Langerhans-CellOrthopedic ProceduresAdolescentChildChild, PreschoolFemaleHumansMagnetic Resonance ImagingMaleRetrospective StudiesTomography, X-Ray Computedchildrenchondroblastomafemoral headLCHtrapdoor procedure

Identifiers

PMID40442572
PMCPMC12214415

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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.