A 70-year-old man presenting with weakness in the left hand and tingling pain in the ulnar aspect of the left hand

Case presentationA 70-year-old man was admitted to the Department of Rehabilitation Medicine of a university hospital for postoperative rehabilitation following the surgical treatment of spondylodiscitis.One month before admission, the patient was diagnosed with spondylodiscitis at the L3-L4 level, accompanied by spinal instability, for which debridement and posterior fixation from L1-L5 were performed.The spinal surgery was performed with the patient in the prone position.He had undergone kidney transplantation for end-stage chronic kidney disease 23 years previously with ongoing oral immunosuppressive therapy consisting of tacrolimus (1 mg twice daily), mycophenolate mofetil (500 mg twice daily), and prednisolone (5 mg once daily).The patient had no additional significant medical history.The patient reported weakness in the left hand accompanied by tingling pain localized to the ulnar aspect, which developed after the spinal surgery.The pain intensity was rated as 3 on the numeric rating scale.On