• Hey Hwee Weng Dennis HWD 0000-0003-1506-8553 University Orthopaedics, Hand and Reconstructive Microsurgery (UOHC), National University Health System, , Keng Lin Wong, Asrafi Rizki Gatam, Joel Louis Lim, and Hee-Kit Wong.
• University Orthopaedics, Hand and Reconstructive Microsurgery (UOHC), National University Health System, 1E Kent Ridge Road, NUHS Tower Block Level 11, Singapore, 119228, Singapore. dennis_hey@nuhs.edu.sg.
• Eur Spine J. 2017 May 1; 26 (Suppl 1): 36-41.

PurposeThis paper aims to describe the rare post-operative complication of a lymphocele formation after lateral lumbar interbody fusion.MethodsThe patient in this case was a 76-year-old lady with a 10 year history of low back pain and neurogenic claudication. She had previously underwent multiple spine surgeries for her condition. She presented to our institution for a recurrence of her low back pain and right anterior thigh pain. She then underwent surgery in two stages; first, a mini-open lateral interbody fusion at L3/4 and L4/5; second, posterior instrumentation of T3 to S1 with sagittal spinal deformity correction.ResultsThe patient recovered uneventfully in the initial post op period and was discharged within 8 days. However, she developed abdominal distension and discomfort 6 months after surgery. MRI and CT scan of her abdomen showed a retroperitoneal fluid collection compressing her left ureter, resulting in hydroureter and hydronephrosis. She was managed with a CT-guided drainage of the fluid collection. Fluid analysis was consistent with a lymphocele. Since the procedure, the patient has been asymptomatic for 2 years.ConclusionsDelayed lymphocele formation is a potential complication of lateral lumbar interbody fusion. When present, it can be managed conservatively with good results. This case suggests that surgeons should have a low threshold to investigate for a lymphocele development post-anterior or lateral lumbar spine surgery. The authors recommend the placement of a post surgical retroperitoneal drain, as it might assist in the early detection of a lymphocele formation.

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