Background Monteggia equivalent lesion represents a group of injury or combined injury patterns that resemble the Monteggia lesion in its presentations and mechanisms. Unlike Monteggia lesions, the equivalent ones, which share vague definitions and mostly occur as sporadic single case reports in the literature, have not been thoroughly reviewed since Bado first proposed the term, especially in the pediatric population. The objective of this review was to elucidate the definition by elaborating on its clinical styles and thus analyzing the mechanism, diagnosis, and management through related literature. Data sources Based on the terms of ‘Monteggia equivalent’, ‘radial neck fracture’ and ‘pediatric’, all of the related literature was searched on the PubMed and Google Scholar search engine. Results The advance of the definitions for pediatric Monteggia equivalent lesion (PMEL) was reviewed. The functional roles of the ulnar and the related mechanism theories in this injury were analyzed. The status of the radiocapitellar joint in this injury was emphasized. According to the previous statements, a new classification model was proposed and proper diagnosis and treatment approaches were suggested. Conclusions PMEL should be defined as an ulnar fracture at any level combined with a proximal radial fracture. According to the status of the radiocapitellar joint, it could be divided into three groups. The occult ulnar bowing and delayed radial head dislocation should be a serious concern of orthopedists. Surgical need is usually warranted. Maintaining the ulnar length and securing the radiocapitellar joint are highly recommended. Data are available in a public, open access repository. As a review article, the data is acquired from the previously published works.

中文翻译：

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儿童孟氏等效病变：叙述性回顾

背景 孟氏等效病变代表一组损伤或联合损伤模式，其表现和机制类似于孟氏损伤。与 Monteggia 病变不同的是，自 Bado 首次提出该术语以来，同类病变的定义含糊不清，并且大多以零星的个案报告形式出现，尤其是在儿科人群中。本综述的目的是通过阐述其临床类型来阐明定义，从而通过相关文献分析其机制、诊断和治疗。数据来源 根据“Monteggia 等效物”、“桡骨颈骨折”和“儿科”等术语，在 PubMed 和 Google Scholar 搜索引擎上搜索了所有相关文献。结果 回顾了儿科孟氏等效病变（PMEL）定义的进展。分析了尺骨在该损伤中的功能作用及相关机制理论。强调了桡骨关节在这种损伤中的地位。根据前面的陈述，提出了一种新的分类模型，并提出了正确的诊断和治疗方法。结论 PMEL 应定义为任何水平的尺骨骨折合并桡骨近端骨折。根据桡小头关节的状况可分为三组。隐匿性尺骨弯曲和迟发性桡骨头脱位应引起骨科医生的高度重视。通常需要手术。强烈建议保持尺骨长度并固定桡骨小头关节。数据可在公共、开放访问的存储库中获得。作为评论文章，数据是从以前发表的作品中获取的。