Preprint / Version 1

RADIOGRAPHIC STUDY OF THE MEDIAL HIP SPACE JOINT IN LEGG-CALVÉ-PERTHES DISEASE

##article.authors##

  • Diego Praxedes de Miras Departamento de Ortopedia e Traumatologia - Escola Paulista de Medicina - Unifesp https://orcid.org/0000-0001-7270-9447
  • Rene Dujardin Departamento de Ortopedia e Traumatologia - Escola Paulista de Medicina - Universidade Federal de São Paulo
  • Roberto Bezerra Nicolau Médico assistente da Disciplina de Traumatologia do Departamento de Ortopedia e Traumatologia - Escola Paulista de Medicina - Universidade Federal de São Paulo
  • Eiffel Tsuyoshi Dobashi Professor Adjunto e Chefe da Disciplina de Ortopedia Pediátrica do Departamento de Ortopedia e Traumatologia - Escola Paulista de Medicina - Universidade Federal de São Paulo

DOI:

https://doi.org/10.1590/SciELOPreprints.2952

Keywords:

Legg-Calvé-Perthes Disease, radiography, classification, child, Joint space

Abstract

OBJECTIVES: To evaluate medial joint space in affected and normal contralateral hips in patients with Legg-Calvé-Perthes disease (LCPD).

MATERIAL AND METHODS: To compare joint space, femoral head extrusion (FHE), hip’s medial space coefficient (MSC) and femoral head width (FHW) in affected and normal hips, using 127 radiographs of patients with unilateral LCPD and considering age groups older and younger than 6 years old as well as their disease stage.

RESULTS: Comparing normal and affected hips, regardless of disease staging, there were no statistically significant differences observed in terms of MSC. However, medial joint distance in affected hips was significantly greater than normal hips.

In the necrosis and fragmentation phase, distance from medial space in affected hips was significantly greater compared to contralateral normal hips.

Comparing only affected hips, MSC and FHW showed statistically significant differences and the group aged >6 yo presented higher values.

Among normal hips, there was a statistically significant difference considering the MSC and FHW in the group aged <6 yo.

CONCLUSIONS: No statistically significant difference was found comparing medial joint space of affected and normal hips, except for early stages of disease (necrosis and fragmentation).

The isolated use of radiographic study is insufficient in LCPD, so that the lack of complementation with other exams, such as magnetic resonance, may delay diagnosis and initiation of treatment.

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Posted

2021-09-15

Section

Health Sciences