Pyomyositis is a commonly encountered condition in the tropics. It was not described in the UK until 1998. The reason for the increasing incidence is not understood. We sought to identify the experience gained of this condition within a UK paediatric tertiary referral unit. Retrospective review of cases of pyomyositis from our institution since 1998 was undertaken to identify demographics, presentation, diagnosis and management. Thirteen cases were identified. The obturator internus was most commonly affected (62%). Staphylococcus aureus was cultured in nine cases (69%). One diagnostic retroperitoneal exploration was performed and all cases were identified by computed tomography or magnetic resonance imaging. To our knowledge, this is the first UK series of pyomyositis, reflecting its increasing Western incidence. Early diagnosis and treatment with antibiotics is all that is needed in the majority of cases. A greater awareness of this emerging condition is necessary to prevent misdiagnosis and unnecessary surgical intervention by all surgeons.
The aim of this study is to assess the long-term results of Ethibloc injection in aneurysmal bone cysts (ABC). Thirty-three patients with ABC were treated with computed tomography-guided percutaneous injection of Ethibloc into the cyst cavity. Twenty-two patients had Ethibloc injection as primary treatment and 11 patients had presented to us with recurrence after previous procedures including steroid injection, bone marrow injection, curettage bone grafting and various other surgical procedures. The mean follow-up was 54 (22-90) months. Symptoms were relieved in all patients. Two patients were lost to follow-up. Eighteen (58%) of the 31 patients followed, had complete resolution of the lesion, 11 (35.5%) patients had partial healing (asymptomatic residual nonprogressive lytic areas). Two (6.5%) patients showed recurrence in the proximal humerus during the follow-up. They are under follow-up but asymptomatic and another two patients encountered more significant complications after the procedure. Ethibloc injection is a relatively simple, minimally invasive alternative procedure for the treatment of ABC, and makes open operation unnecessary by stopping the expansion of the cyst and inducing endosteal new bone formation. This technique may be used as the primary management of ABC's excluding spinal lesions as shown by our largest and longest follow-up study.
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