Epidermoid cysts comprise less than 1% of intraspinal tumors. They can be congenital, frequently associated with other spinal malformations, or iatrogenic, resulting from the implantation of epidermal cells within the spinal canal during the execution of a variety of procedures such as spinal puncture. At MR imaging epidermoid tumors can mimic cystic lesions with fluid content such as arachnoid cysts. DWI can help obtain a correct diagnosis. We describe a case of iatrogenic lumbar epidermoid cyst with DWI findings in a young woman who had undergone epidural anesthesia for Cesarean section three years before the onset of symptoms.
ParkJCChungCKKimHJ. Iatrogenic spinal epidermoid tumor. A complication of spinal puncture in an adult. Clin Neurol Neurosurg. 2003; 105 (4): 281–285.
2.
ZivETGordon McCombJKriegerMD. Iatrogenic intraspinal epidermoid tumor: two cases and a review of the literature. Spine (Phila Pa 1976). 2004: 29 (1): E15–E18.
3.
KukrejaKManzanoGRaghebJ. Differentiation between pediatric spinal arachnoid and epidermoiddermoid cysts: is diffusion-weighted MRI useful?Pediatr Radiol. 2007; 37 (6): 556–560.
TsurudaJSChewWMMoseleyME. Diffusion weighted MR imaging of the brain: value of differentiating between extraaxial cysts and epidermoid tumors. Am J Neuroradiol;11: 925–931.
15.
ChenSIkawaFKurisuK. Quantitative MR evaluation of intracranial epidermoid tumors by fast fluid-attenuated inversion recovery imaging and echo-planar diffusion-weighted imaging. Am J Neuroradiol. 2001; 22 (6): 1089–1096.
16.
AribandiMWilsonNJ. CT and MR imaging features of intracerebral epidermoid—a rare lesion. Br J Radiol. 2008; 81 (963): e97–e99.
17.
BammerRFazekasFAugustinM. Diffusion-weighted MR imaging of the spinal cord. Am J Neuroradiol. 2000; 21 (3): 587–591.
18.
ManaraRSeverinoMMandariR. Chronic cystic lesion of the sacrum: characterisation with diffusion-weighted MR imaging. Radiol Med.2008; 113 (5): 739–746. Epub 2008 Jun 3.
19.
KikuchiKMikiHNakagawaA. The utility of diffusion-weighted imaging with navigator-echo technique for the diagnosis of spinal epidermoid cysts. Am J Neuroradiol. 2000; 21 (6): 1164–1166.
20.
BammerRAugustinMProkeschRW. Diffusion-weighted imaging of the spinal cord: interleaved echo-planar imaging is superior to fast spin-echo. J Magn Reson Imaging. 2002; 15: 364–373.
21.
ZaharchukGSaritasEUAndreJB. Reduced field-of-view diffusion imaging of the human spinal cord: comparison with conventional single-shot echo-planar imaging. Am J Neuroradiol. 2011; 32: 813–820.
