1. Usefulness of epiphyseal quotient measurement on magnetic resonance images for outcome prediction in patients with early-stage Legg-Calve-Perthes disease
- Author
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Yuichi Tsuchida, Toshikazu Kubo, Motoyuki Horii, Kyung Chang, Mikihiro Fujioka, Motoo Hosokawa, Kenji Takahashi, Torao Kusakabe, Yasuo Mikami, and Wook-Cheol Kim
- Subjects
Male ,medicine.medical_specialty ,Orthotic Devices ,Sensitivity and Specificity ,Severity of Illness Index ,Sampling Studies ,Femoral head ,Predictive Value of Tests ,Severity of illness ,medicine ,Legg-Calve-Perthes disease ,Humans ,Orthopedics and Sports Medicine ,Stage (cooking) ,Child ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,medicine.disease ,Prognosis ,Magnetic Resonance Imaging ,Orthotic device ,Surgery ,medicine.anatomical_structure ,Predictive value of tests ,Child, Preschool ,Pediatrics, Perinatology and Child Health ,Legg-Calve-Perthes Disease ,Female ,business ,Outcome prediction ,Epiphyses - Abstract
To investigate the usefulness of epiphyseal quotient (EQ) measurement for outcome prediction in patients with Legg-Calve-Perthes disease (LCPD), magnetic resonance (MR) imaging was performed in 26 patients with unilateral LCPD within 6 months of the disease onset and subsequently once every 3 months. All the patients were treated conservatively in our institute between 1990 and 1999. The mean follow-up period was 80 months. Clinical outcome was evaluated based on the plain radiograms of the femoral head at the final examination according to Stulberg's classification: the patients whose outcome was class I were regarded as 'excellent' (excellent group), class II as 'good' (good group), and classes III, IV and V as 'poor' (poor group). The excellent group consisted of 10 patients, the good group of 12, and the poor group of four. The EQ measured on MR images (MR-EQ) decreased remarkably in the poor group chronologically, whereas there was no decrease in the excellent group and a slow decrease in the good group. The mean MR-EQ at or before the sixth month (range, 2-6 months; mean, 4.9 months) was 86.2 (range, 76.8-94.8) in the excellent group, 78.3 (57.0-93.4) in the good group, and 67.4 (57.8-74.5) in the poor group (P
- Published
- 2004