The disc herniation is one of the most frequent pathologies in the neurosurgical practice. Localization of a portion or all of it in the intradural space is an uncommon complication that can be difficult to differentiate clinically and imagingly from both common hernias and intradural tumors. Its diagnosis is often presumptive until the moment of the surgical treatment. A clinical case of intradural lumbar disc herniation at the L2-L3 level is presented and a review of the pathogenesis, clinical features, imaging findings, treatment and prognosis of these lesions is performed.