BACKGROUND: Spinal subdural hematoma is a rare clinical entity marked by the 
onset of pain and paralysis, which is usually associated with hemorrhagic 
disorders, trauma, and iatrogenic causes such as lumbar puncture or epidural 
anesthesia.
CASE DESCRIPTION: A 71-year-old man was admitted to our hospital with 2 weeks' 
history of bilateral lower leg pain, dysesthesia, paraparesis, and urinary 
disturbance. Magnetic resonance imaging showed characteristic findings at the 
thoracolumbar spine, and surgical evacuation successfully treated this 
condition. The postoperative course was uneventful. The patient gradually 
recovered from paraparesis and was discharged 4 weeks after operation.
CONCLUSIONS: We report an extremely rare case of chronic spinal subdural 
hematoma associated with antiplatelet therapy. Spinal subdural hematoma should 
be considered as the differential diagnosis of gait disturbance in patients 
undergoing antiplatelet therapy. Early diagnosis and identification of the 
extent of the hematoma are necessary for successful treatment.