Fractures of the anatomical neck of the humerus are an extremely rare pathological entity in the field of orthopedic surgery. One of the most feared complications associated with anatomical neck fracture of the humerus is avascular necrosis (AVN). The literature does not contain clear, evidence-based guidelines for the surgical management. This case report highlights the case of a 33-year-old male patient who presented with anatomical neck humerus fracture dislocation after a snowboarding accident. Computed tomography showed a comminuted displaced fracture involving the right humeral neck associated with anterior dislocation of the right shoulder. A small bony fragment adjacent to the glenoid posteriorly was also revealed. The patient was treated with open reduction and internal fixation (ORIF). After 3 years of follow-up, the patient is fully recovered with a normal range of motion of his right shoulder joint. The patient did not show any signs of AVN of the humeral head throughout the course of the 3-year follow-up. Anatomical neck fractures of the humerus are uncommon injuries in the literature. Due to the poor vascularization and the absence of attachment to soft tissue, there is a significantly high risk of AVN associated with fractures of the anatomical neck of the humerus. The patient presented in our report was treated with ORIF since it allows preservation of the humeral head.
Case Rep Orthop Res 2020;3:108–117

中文翻译：

---

肱骨近端解剖颈骨折脱位：病例报告及文献复习

肱骨解剖颈部骨折是整形外科领域中极为罕见的病理学实体。与肱骨解剖颈骨折相关的最令人担忧的并发症之一是血管坏死（AVN）。文献中没有明确的基于证据的手术管理指南。该病例报告突出了一名单板滑雪事故后出现解剖性肱骨骨折脱位的33岁男性患者的病例。计算机体层摄影术显示粉碎性移位的骨折累及右肱骨颈并伴有右肩前脱位。还发现了一个小骨碎片，靠近后关节盂。该患者接受了切开复位内固定（ORIF）治疗。经过3年的随访，患者右肩关节的正常运动范围已完全康复。在3年的随访过程中，患者未显示任何肱骨头的AVN征象。在文献中，肱骨的解剖学颈骨折是罕见的损伤。由于不良的血管形成和对软组织的附着，AVN与肱骨解剖颈骨折相关的风险很高。我们的报告中介绍的患者接受了ORIF治疗，因为它可以保护肱骨头。由于不良的血管形成和对软组织的附着，AVN与肱骨解剖颈骨折相关的风险很高。我们的报告中介绍的患者接受了ORIF治疗，因为它可以保护肱骨头。由于不良的血管形成和对软组织的附着，AVN与肱骨解剖颈骨折相关的风险很高。我们的报告中介绍的患者接受了ORIF治疗，因为它可以保护肱骨头。
Case Rep Orthop Res 2020; 3：108–117