Introduction Knee osteoarthritis and cervical spondylotic myelopathy are both frequent disorders in the aging patient. Total knee arthroplasty is an increasingly common surgical procedure, with approximately 20% of patients describing persistent knee pain after the procedure, for which it is often difficult to find a cause. We review known reasons for pain after total knee arthroplasty and present a new clinically challenging case of persistent knee pain due to previously undiagnosed cervical spondylotic myelopathy. Case presentation Our patient presented with painful knee spasms after an uncomplicated total knee arthroplasty. Her workup revealed cervical spondylotic myelopathy with isolated changes in tone in the affected extremity as well as weakness and atrophy in non-painful limbs. Her clinical status improved after cervical decompression and fusion. We perform a literature review for prior reports of isolated knee pain due to cervical spondylotic myelopathy and find no previous reported association with total knee arthroplasty. Discussion Cervical spondylotic myelopathy is the most common spinal cord disorder in older adults. Incidence increases with age and the clinical manifestations may present with a variety of neurological findings. Careful musculoskeletal and neurologic examination is critical to an accurate and timely diagnosis.

中文翻译：

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继发于未确诊的脊髓病的简单全膝关节置换术后持续性膝关节疼痛：病例报告。

简介 膝骨关节炎和脊髓型颈椎病都是老年患者的常见疾病。全膝关节置换术是一种越来越常见的外科手术，大约 20% 的患者在手术后描述持续性膝关节疼痛，但通常很难找到原因。我们回顾了全膝关节置换术后疼痛的已知原因，并提出了一个新的具有临床挑战性的病例，即由于先前未确诊的脊髓型颈椎病而导致持续性膝关节疼痛。病例介绍 我们的患者在进行简单的全膝关节置换术后出现疼痛性膝关节痉挛。她的检查显示她患有脊髓型颈椎病，受影响的肢体有孤立的张力变化，以及无痛肢体的无力和萎缩。颈椎减压融合术后，她的临床状况有所改善。我们对先前关于脊髓型颈椎病引起的孤立性膝关节疼痛的报道进行了文献综述，发现之前没有报道与全膝关节置换术相关。讨论 脊髓型颈椎病是老年人最常见的脊髓疾病。发病率随着年龄的增长而增加，临床表现可能表现为多种神经系统症状。仔细的肌肉骨骼和神经系统检查对于准确及时的诊断至关重要。