[A Case of Symptomatic Nonhemorrhagic and Nonthrombotic Cervicothoracic Epidural Varices].

We describe an extremely rare case of symptomatic nonhemorrhagic and nonthrombotic cervicothoracic epidural varices. A 45-year-old man presented with back pain and left leg weakness. MRI revealed an epidural mass at the Th1 level, on the dorsal aspect of the spinal canal on the right side. Although MRI scans obtained 10 days after the initial scans(obtained at the first visit to our hospital)revealed disappearance of the epidural mass at the Th1 level on non-contrast images and on images obtained 90 s after intravenous gadolinium injection, the images obtained 5 min after intravenous gadolinium injection revealed the epidural mass at the Th1 level. The patient's symptoms had resolved;therefore, we administered conservative therapy. Although the patient initially continued to show symptomatic improvement, he developed clinical relapse without any evidence of relapse on MRI. Left leg weakness and back pain worsened a year later, and repeat MRI revealed reappearance of the epidural mass at the Th1 level. Cervicothoracic laminectomy revealed nonhemorrhagic epidural varices, and we performed total en bloc resection. Histopathological examination of the resected specimen showed nonthrombotic varices. The patient's neurological symptoms improved postoperatively without relapse. Intermittent expansion of varicose veins in accordance with changes in venous pressure may cause compressive myelopathy. Clinicians should consider the possibility of spinal epidural varices in patients who present with spinal epidural lesions that tend to show intermittent improvement with subsequent worsening.