ABSTRACT Objective: This study reviews the literature and shares clinical experiences, emphasizing its diagnostic relevance in children under 5 years of age. Method: We examined 169 cases of Legg-Calvé-Perthes disease (LCPD) in patients in this age group. We analyzed medical records and images, observing variables such as age, gender, complaints, treatment, and outcomes. Results: We studied 20 patients with Meyer’s dysplasia, representing 1.4% of LCPD cases in children. The majority were boys (85%) with symptom onset at 38 months. Claudication (25%) and mild pain (40%) were the main complaints. Radiographic findings showed a smaller, granular, or asymmetric nucleus. The average follow-up was 6.4 years, with interventional treatment in 5 cases. Most showed complete reossification and centralization of the femoral head. Conclusion: Meyer’s dysplasia is a rare condition that affects the hip in children under 5 years of age, predominantly in boys. It usually does not require intensive treatment; clinical and radiological follow-up is sufficient. However, it is important to be aware of possible unfavorable progressions, requiring more aggressive treatment to prevent complications. Level of evidence III, Retrospective comparative study.

Fabio Carramão Narimatsu

Pedro Alcantara Barroso

Alceu José Fornari Gomes Chueire

Paulo Humberto Mem Martendal Costa

Miguel Akkari

Claudio Santili

Acta Ortopédica Brasileira

REVISTA ACTA ORTOPÉDICA BRASILEIRA 是圣保罗大学医学院 (DOT/FMUSP) 骨科和创伤学系的官方期刊，每年出版六期（1 月/2 月、3 月/4 月、 5 月/6 月、7 月/8 月、9 月/10 月和 11 月/12 月），并在巴西的主要国家和国际索引器和教育机构中提供英文版本。今天，它被认为是对该领域专家的重要贡献，因为它对已经征服的指数的认真和辛勤工作。

Acta Ortopedica Brasileira is the official journal of the Department of Orthopedics and Traumatology at the School of Medicine of the University of São Paulo (DOT/FMUSP). It publishes six issues annually (January/February, March/April, May/June, July/August, September/October, and November/December) and provides an English version accessible through major national and international indexers and educational institutions in Brazil. Today, it is regarded as a significant contribution to the field, recognized for its diligence and serious efforts in achieving indexed status.

《Acta Ortopedica Brasileira》是圣保罗大学医学院（DOT/FMUSP）骨科和创伤学系的官方期刊，每年出版六期（1月/2月、3月/4月、5月/6月、7月/8月、9月/10月和11月/12月），并在巴西的主要国家和国际索引器及教育机构中提供英文版本。该期刊被认为是对骨科领域专家的重要贡献，因其在已征服的索引中所做的认真和辛勤工作。

Category	Quartile
医学	4
医学, 骨科	4

MEYER’S DYSPLASIA IN THE DIFFERENTIAL DIAGNOSIS OF HIP PAIN IN CHILDHOOD

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