• Jorrit De Vries, Marinus D Oterdoom, Wilfred F Den Dunnen, Roelien H Enting, Reina W Kloet, Wilfried W Roeloffzen, and Hanne-Rinck R Jeltema.
• Department of Neurosurgery, University Medical Center Groningen, Groningen. Electronic address: jorrit.dv96@gmail.com.
• World Neurosurg. 2020 Oct 1; 142: 227-232.

BackgroundT-cell lymphoblastic lymphoma (T-LBL) is a rare and aggressive form of non-Hodgkin lymphoma. This report describes, to our knowledge, the first adult case of a primary cauda equina T-LBL. Treatment consists of multiagent chemotherapy, and surgical removal of T-LBL does not improve outcome. We discuss the workup of patients with an intradural spinal mass, together with a review of the literature on primary spinal lymphoma of the cauda equina.Case DescriptionA 54-year-old woman with Crohn's disease, for which she was taking immunosuppressive medication, presented with progressive back pain radiating to both legs and deteriorating neurologic deficits caused by an intradural, contrast-enhancing lesion in the L1-5 region. During acute surgery, the tumor was partially resected. Immunohistochemical phenotyping revealed a T-LBL. No other lymphoma localizations were found after subsequent staging. Despite extensive treatment, the patient died of disseminated disease throughout the central nervous system, 6 weeks after the diagnosis.ConclusionsPain and progressive neurologic complaints can be symptoms of a (malignant) intradural spinal tumor. Intradural lymphoma must be considered as a differential diagnosis by clinicians because it can mimic neoplasms that often require urgent surgery. The histopathologic diagnosis should preferably be obtained by way of cerebrospinal fluid analysis or tumor biopsy because tumor resection has no beneficial effect on the oncologic outcome.Copyright © 2020 Elsevier Inc. All rights reserved.

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