Lipomyelomeningoceles are one of the forms of closed spinal dysraphism. They usually present as a subcutaneous fatty mass just above the intergluteal cleft. However, some lipomyelomeningoceles may occur at other locations along the spinal canal.
Lipomyelomeningoceles may be clinically detectable as a subcutaneous fatty mass above the intergluteal crease.
These lesions are formed mainly due to a defect in primary neurulation in which mesenchymal tissue enters into neural placode and forms lipomatous tissue.
It shows a non-specific splaying / non-fusion of the posterior elements of the spine, which usually cannot be differentiated from the other spinal dysraphisms.
Ultrasound will show the vertebral arch defector defect associated with an elongated spinal cord with the placode attached to an intrathecal echogenic fatty mass that protrudes in the dorsal subcutaneous tissue (see case 2).
- spina bifida
- focal enlargement of the spinal canal at the placode level
- hypodense fat-attenuated mass in continuity with the subcutaneous fat planes
- typically seen as a spinal defect with lipomatous tissue, covered with skin
- neural placode-lipoma interface lies outside the spinal canal due to enlargement of subarachnoid space
- a low-lying cord is usually present
- lipomyelocele: placode-lipoma interface lies within the spinal canal
- 1. Sarris CE, Tomei KL, Carmel PW et-al. Lipomyelomeningocele: pathology, treatment, and outcomes. Neurosurg Focus. 2012;33 (4): E3. doi:10.3171/2012.7.FOCUS12224 - Pubmed citation
- 2. Rufener SL, Ibrahim M, Raybaud CA et-al. Congenital spine and spinal cord malformations-pictorial review. AJR Am J Roentgenol. 2010;194 (3_supplement): S26-37. doi:10.2214/AJR.07.7141 - Pubmed citation
- 3. Erol FS, Ucler N, Yakar H. Lateral lower thoracic lipomyelomeningocele: a case report. Cases J. 2009;2 (1): 8122. doi:10.4076/1757-1626-2-8122 - Free text at pubmed - Pubmed citation
- 4. Lee SH, Je BK, Kim SB et-al. Adult with sacral lipomyelomeningocele covered by an anomalous bone articulated with iliac bone: computed tomography and magnetic resonance images. Congenit Anom (Kyoto). 2012;52 (2): 115-8. doi:10.1111/j.1741-4520.2011.00335.x - Pubmed citation
- 5. Brophy JD, Sutton LN, Zimmerman RA et-al. Magnetic resonance imaging of lipomyelomeningocele and tethered cord. Neurosurgery. 1989;25 (3): 336-40. Pubmed citation
- 6. Sutton LN. Lipomyelomeningocele. Neurosurg. Clin. N. Am. 1995;6 (2): 325-38. Pubmed citation
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