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J Neurosurg Pediatr. 2011 Sep;8(3):321-4. doi: 10.3171/2011.6.PEDS10480.

Growing mammary choristoma masquerading as a lumbosacral lipomyelomeningocele in a pubertal girl.

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  • 1Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53792, USA.


The authors report, to the best of their knowledge, the first case of lumbosacral choristoma of breast origin, presenting in a young girl with lumbosacral lipomyelomeningocele. Although choristomas are considered to be benign, the regrowth of this mass when the patient was 15 and 16 years of age, and its involvement in the conus medullaris and cauda equina, warranted 2 additional resections with spinal cordotomy resulting in cessation of any further growth. The authors describe the case and provide a review of pertinent literature and a discussion of the mechanisms involving the development and growth of this lesion.

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