Study Design. This case report presents a patient with ureter injury a
fter anterior spinal fusion and its management. Objectives. To present
possible causes, symptoms, diagnostic approach, and management of thi
s rare complication. Summary of Background Data. The reported complica
tions of anterior surgical approaches to the lumbar spine have been pr
edominantly vascular or neurologic. The susceptibility of the ureter t
o injury is emphasized by the description of an as-yet-unreported case
of ureter laceration after anterior lumbar fusion. Methods. Ureter in
jury was diagnosed using computed axial tomography, ultrasonography-gu
ided aspiration, and chemical analysis of the aspirate after anterior
spinal fusion. Results. Early diagnosis of this injury prompted a uret
er stent placement and prevented additional deterioration of renal fun
ction and infection. Conclusions. The ureter is prone to injury if not
identified and protected when sharp and pointed instruments are used
for retraction. Abdominal mass, low-grade fever, and leukocytosis shou
ld prompt use of computed tomography or ultrasonography-guided aspirat
ion.