背景：肺癌為全球最常見的癌症，而神經系統是其最常轉移的器官。本篇個案是一位診斷為肺腺癌的46歲女性，2021年9月發生癲癇及左側下肢無力，腦部核磁共振檢查發現復發性腦部轉移腫瘤，並接受手術治療，於2022年2月14日開始進行門診物理治療介入，其主訴為左側下肢無力及行走不穩。研究方法：本個案報告將藉由個案處理模式做評估及介入的呈現，同時結合「國際功能、失能和健康分類」模式分析個案在行走功能上的限制。檢查及介入：理學檢查發現其左側下肢肌力不足、感覺異常及動作控制不佳，造成個案在站姿平衡和行走功能受影響。而後依據分析結果及參考相關實證設計此個案的肌力訓練，另外也藉由動態平衡訓練及行走訓練等介入改善個案的站立平衡及行走功能。結果：經過5週短期治療後，個案伯格式平衡量表進步5分；計時起走測試進步18秒；行走速度進步0.67 m/s，均達最小臨床重要差異值。結論：經由5週的肌力、平衡訓練及行走訓練，有利於肺腺癌合併腦部轉移造成單側輕癱患者平衡及行走功能的恢復。

Background: Lung cancer is the most common cancer in the world and the nerve system is the most common metastasis organ. This case reported was a forty-six year-old woman who was diagnosed with lung adenocarcinoma and suffered from seizure and weakness of left lower extremity since September, 2021. The brain magnetic resonance imaging (MRI) showed recurrent metastatic brain tumor and she underwent treatment of surgery. The intervention of physical therapy started 14th February, 2022. The chief complaint of this case was weakness over left lower extremity. Unsteady gait during walking was also reported. Methods: This case report will use the client management model (CMM) for evaluation and presentation of interventions. “International Classification of Functioning, Disability and Health” model was used to analyze limiting factors of the case's current walking function. According to our physical examination, muscle weakness, impaired sensation and insufficient motor control of the left lower extremity affected this patient's balance performance and walking ability. We designed the treatment programs which included muscle strengthening, balance and ambulation training. Results: After five weeks of intervention, significant improvements in balance and walking ability were found. There was a 5-point increase in Berg balance scale, a 18-second decrease in the Timed Up & Go test, and a 0.67 m/s increase in walking speed. All these outcomes had reached the minimal clinically important difference. Conclusion: After five weeks of muscle strengthening, walking training and balance training, beneficial effects for this patient with lower extremities hemiplegia resulted from lung adenocarcinoma with brain metastases could be found.