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  • Title: [Acute hematogenous osteomyelitis of the neck of the femur in children: 28 cases].
    Author: Jenzri M, Safi H, Nessib MN, Jalel C, Smida M, Ammar C, Ben Ghachem M.
    Journal: Rev Chir Orthop Reparatrice Appar Mot; 2008 Feb; 94(1):49-57. PubMed ID: 18342030.
    Abstract:
    PURPOSE OF THE STUDY: Osteomyelitis of the neck of the femur is uncommon, often with a misleading clinical presentation. We report a series of 28 cases of osteomyelitis of the femoral neck to illustrate the particular clinical and imaging findings related to this localization. MATERIAL AND METHODS: This was a series of 28 children treated in our unit from 1990 through 2004: 17 boys and 11 girls, mean age eight years (range one month to 14 years). We analyzed the data in this series using a standard checklist, which noted the diagnostic and therapeutic measures. Results were analyzed by studying the complications, anatomic and functional outcome at mean follow-up of 3.5 years. RESULTS: Time from symptom onset to consultation was five days on average with a delay of 4.5 days from consultation to hospitalization. Intense pain was noted for eight patients (28%) and total functional incapacity of the limb was noted for 15 (53%). Hip stiffness was observed in 11 patients (39%). The diagnosis of osteomyelitis of the femoral neck was established on the basis of imaging (MRI or scintigraphy) in three patients with bacteriological proof in two, of operative findings which confirmed the neck localization in 19, and on changes in the X-ray image of the neck in six. A positive bacteriology was noted in 71%. The germ was isolated from blood cultures and local samples obtained by arthrotomy in five patients (same germ), only in blood cultures for four, and only in local samples in 11. Met-S Staphylococcus aureus was isolated in 18 patients, Met-R S. aureus in one and a Streptococcus in one. All patients were given medical treatment and 25 underwent surgery. There were five thromboembolic complications and five patients who developed femoral pandiaphysitis. Results were analyzed at mean 3.5 years (range four months to 14 years). Complete hip motion was recovered in 78%. There were four cases of hip stiffness and two cases of ankylosis. Partial cephalic necrosis was noted in two hips and total necrosis of the head and neck in two. DISCUSSION: Little data is available in the literature on isolated osteomyelitis of the femoral neck. Based on the pathogenic mechanisms known for osteomyelitis, an isolated localization in the neck of the femur, with no other site in the hip joint, is quite possible in an early stage of infection. We discuss the specific clinical and imaging features of this localization. Analysis of our findings show that the prognosis of femoral neck osteomyelitis is directly related to time to management. Outcome is poorer when treatment is started late. Prognosis is poor if pandiaphysitis develops.
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