骨软骨瘤是附肢骨骨架中最常见的良性肿瘤，在脊柱中发现较少。尽管颈椎脊柱是脊柱骨软骨瘤最常见的部位，但下颈椎脊柱很少受到影响。我们报道了一个16岁的女性青少年病例，她有一个硬性可触及的肿块位于颈部的枕骨稍右侧，伴随着非放射性疼痛已有3年之久。放射学和计算机断层扫描（CT）显示一种来源于第六颈椎棘突（C6）的扩展性骨病变。我们对肿瘤进行了整块切除手术，从而缓解了症状。组织病理学检查显示存在一种无恶性特征的骨软骨瘤。骨软骨瘤是一种常见的良性骨肿瘤，主要发生在附肢骨骨架中，很少发生在脊柱中。它可以是孤立性的，也可以与多发性遗传性骨赘生（MHE）相关联。颈椎脊柱是最常受影响的区域，其症状因其位置而异。诊断常使用影像学，对于有症状的病例，建议进行外科切除以防止神经系统损害、复发，并通过组织病理学证实诊断。对于诊断颈椎骨软骨瘤等罕见疾病，需要高度的临床怀疑和影像技术的协助，以便对表现出相关症状的患者进行诊断。通过整块切除手术可以获得最佳疗效。版权所有 © 2023 作者，由 Elsevier Ltd. 发布。保留一切权利。

Osteochondromas, the most common benign tumors of the appendicular skeleton, are uncommonly found in the spine. Although the cervical spine is the most frequent location of spinal osteochondromas, the lower cervical spine is less commonly affected.We present the case of a 16-year-old female adolescent who presented with a hard palpable mass over the nape of the neck more toward the right side associated with non-radiating pain for 3 years. Radiography and computed tomography (CT) revealed an expansile bone lesion arising from the sixth cervical spinous process (C6). En-bloc resection of the tumor was performed, which alleviated her symptoms. A histopathological examination revealed the presence of an osteochondroma without any features suggestive of malignancy.Osteochondroma is a common benign bone tumor, mainly found in the appendicular skeleton, with rare occurrences in the spine. It can be solitary or associated with multiple hereditary exostoses (MHE). The cervical spine is the most affected area, and its symptoms vary depending on its location. Diagnosis involves imaging, and surgical excision is recommended for symptomatic cases to prevent neurological compromise, and recurrence, and to confirm the diagnosis by histopathology.Diagnosing rare conditions such as cervical osteochondroma requires a high level of clinical suspicion and the assistance of imaging techniques in patients exhibiting relevant symptoms. Optimal outcomes were achieved using en bloc resection.Copyright © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.