RADIOGRAPHIC STUDY OF THE MEDIAL HIP SPACE JOINT IN LEGG-CALVÉ-PERTHES DISEASE
Keywords:Legg-Calvé-Perthes Disease, radiography, classification, child, Joint space
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.
Copyright (c) 2021 Diego Praxedes de Miras, Rene Dujardin, Roberto Bezerra Nicolau, Eiffel Tsuyoshi Dobashi
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