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Abstract：
BACKGROUND: Transient osteoporosis of the hip (TOH) is a poorly understood and forgotten clinical entity. The diagnosis is often delayed, and inappropriate treatment is provided, due to the lack of its awareness among the clinicians.
METHODS: Twelve patients (11 male and one female) within the age group of 35-50 years, were identified retrospectively from the hospital records between July 2011 and June 2015 who had evidence of TOH on clinical and radiological parameters.
RESULTS: All the patients were treated conservatively by nonweight bearing mobilization, anti-inflammatory drugs, bisphosphonates, calcium, and Vitamin D supplements. None of our patients had any symptoms after 6 months of conservative management. The disease did not progress, and there was no evidence of hip joint involvement in any of the cases. Plain radiographs were not diagnostic in the early detection of TOH. Magnetic resonance imaging was found to be highly specific and sensitive in diagnosing TOH. The clinical condition of TOH is characterized by its acute onset of hip pain in middle-aged people, and its symptoms are out of proportion to the radiological findings.
CONCLUSIONS: The TOH is a nondestructive and self-limiting condition of the hip, which responds well to the conservative treatment. We believe that TOH could be a subset of complex regional pain syndrome type 1, as it has many similarities in clinical presentation and management. Awareness of this entity is important to the clinicians for an early diagnosis and to avoid unnecessary treatment for other mimicking conditions.
METHODS: Twelve patients (11 male and one female) within the age group of 35-50 years, were identified retrospectively from the hospital records between July 2011 and June 2015 who had evidence of TOH on clinical and radiological parameters.
RESULTS: All the patients were treated conservatively by nonweight bearing mobilization, anti-inflammatory drugs, bisphosphonates, calcium, and Vitamin D supplements. None of our patients had any symptoms after 6 months of conservative management. The disease did not progress, and there was no evidence of hip joint involvement in any of the cases. Plain radiographs were not diagnostic in the early detection of TOH. Magnetic resonance imaging was found to be highly specific and sensitive in diagnosing TOH. The clinical condition of TOH is characterized by its acute onset of hip pain in middle-aged people, and its symptoms are out of proportion to the radiological findings.
CONCLUSIONS: The TOH is a nondestructive and self-limiting condition of the hip, which responds well to the conservative treatment. We believe that TOH could be a subset of complex regional pain syndrome type 1, as it has many similarities in clinical presentation and management. Awareness of this entity is important to the clinicians for an early diagnosis and to avoid unnecessary treatment for other mimicking conditions.
摘要：
背景：暂时性髋部骨质疏松症（TOH）是一个鲜为人知和遗忘的临床实体。诊断经常延迟，并提供不适当的治疗，由于临床医生缺乏意识。
方法：35-50岁年龄段的12名患者（11名男性和1名女性），从2011年7月至2015年6月期间的医院记录中回顾性发现了TOH在临床和放射学参数方面的证据。
结果：所有患者均采用非负重动员保守治疗，抗炎药,双膦酸盐，钙，和维生素D补充剂。保守治疗6个月后，我们的患者均未出现任何症状。疾病没有进展，在任何情况下都没有髋关节受累的证据。在TOH的早期检测中，X线平片无法诊断。发现磁共振成像在诊断TOH方面具有高度特异性和敏感性。TOH的临床特征是中年人髋部疼痛急性发作，其症状与放射学结果不成比例。
结论：TOH是髋部的一种非破坏性和自限性状态，对保守治疗反应良好。我们认为TOH可能是1型复杂区域疼痛综合征的一个子集，因为它在临床表现和治疗上有许多相似之处。对该实体的认识对于临床医生的早期诊断和避免对其他模拟条件的不必要治疗是重要的。
方法：35-50岁年龄段的12名患者（11名男性和1名女性），从2011年7月至2015年6月期间的医院记录中回顾性发现了TOH在临床和放射学参数方面的证据。
结果：所有患者均采用非负重动员保守治疗，抗炎药,双膦酸盐，钙，和维生素D补充剂。保守治疗6个月后，我们的患者均未出现任何症状。疾病没有进展，在任何情况下都没有髋关节受累的证据。在TOH的早期检测中，X线平片无法诊断。发现磁共振成像在诊断TOH方面具有高度特异性和敏感性。TOH的临床特征是中年人髋部疼痛急性发作，其症状与放射学结果不成比例。
结论：TOH是髋部的一种非破坏性和自限性状态，对保守治疗反应良好。我们认为TOH可能是1型复杂区域疼痛综合征的一个子集，因为它在临床表现和治疗上有许多相似之处。对该实体的认识对于临床医生的早期诊断和避免对其他模拟条件的不必要治疗是重要的。
