Nocardia is a Gram-positive, partially acid-fast, catalase-positive, and urease-positive bacterium that grows aerobically. We present an extremely rare case of cauda equina syndrome due to isolated intramedullary Nocardia farcinica infection. A 44-year-old male presented with low backache and gradually progressive weakness in bilateral lower limbs followed by paraplegia. He was found to have a well-defined, sharply demarcated ring-enhancing lesion located from T11-T12 to L3 vertebral body. He underwent laminectomy and decompression. The histopathological examination revealed a Gram-positive filamentous organism that looks like Nocardia. The culture report was suggestive of Nocardia farcinica. He was then treated with antibiotics and had a remarkable clinical and radiological improvement.

诺卡氏菌是需氧菌生长的革兰氏阳性，部分耐酸，过氧化氢酶阳性和脲酶阳性细菌。由于孤立的髓内诺卡氏性诺卡氏菌感染，我们提出了马尾综合症极罕见的病例。一名44岁的男性表现出低腰酸，双侧下肢逐渐进行性无力，继而出现截瘫。发现他患有从T11-T12到L3椎体的界限分明，清晰界定的环形增强病变。他接受了椎板切除术和减压。组织病理学检查发现革兰氏阳性丝状生物体看起来像诺卡氏菌。培养报告提示诺卡氏菌。然后，他接受了抗生素治疗，临床和放射学得到了显着改善。