The cauda equina syndrome is a clinical diagnosis usually requiring immediate surgical treatment to prevent long-lasting neurological sequelae. A 33-year-old woman with a 2-week history of left-sided leg pain and perianal hypoesthesia was referred to us when urinary retention and fecal incontinence developed. The clinical diagnosis of cauda equina syndrome was made. Imaging revealed an intraspinal mass filling up the entire spinal canal at the L5-S1 level (Figure 1).
Theys T, Kho KH. The Saddle and the Horse’s TailCauda Equina Syndrome. JAMA Neurol. 2014;71(7):914-915. doi:10.1001/jamaneurol.2013.6008