Advertisement

Dermal Sinus

  • Jonathan R. EllenbogenEmail author
  • Conor L. Mallucci
Chapter
Part of the Springer Surgery Atlas Series book series (SPRISURGERY)

Abstract

A dermal sinus tract is a form of occult spinal dysraphism. Embryologically, it results from a focal incomplete disjunction of the surface ectoderm and dermal elements from the neuroectoderm. This process likely occurs between the third and eighth weeks of gestation. Later during embryogenesis, the spinal cord ascends relative to the spinal canal and stretches the adhesion cephalad into a long, tubular tract. Dermal sinus tracts are therefore abnormal communications extending from the skin surface to the spinal fascia, dura mater, or neural elements, and are lined with epithelium. Although dermal sinuses can occur anywhere from the upper cervical region to the midsacrum, they are most commonly found in the midline in the lumbar or lumbosacral area. Some dermal sinuses end blindly within the soft tissues superficial to the underlying lamina, but 60–70% reach the subarachnoid space, half attaching to the filum or the conus.

Keywords

Dermal sinus Dysraphism Coccygeal pit Intradural Dermoid Epidermoid 

Suggested Reading

  1. Albright AL, Pollack IF, Adelson PD. Principles and practice of pediatric neurosurgery. 3rd ed. New York: Thieme; 2015.Google Scholar
  2. Elton S, Oakes WJ. Dermal sinus tracts of the spine. Neurosurg Focus. 2001;10:e4.CrossRefGoogle Scholar
  3. Tisdall MM, Hayward RD, Thompson DNP. Congenital spinal dermal tract: how accurate is clinical and radiological evaluation? J Neurosurg Pediatr. 2015;15:651–6.CrossRefGoogle Scholar
  4. Zerah M, Kulkarni AV. Spinal cord malformations. In: Dulac O, Lassonde M, Sarnat HB, editors. Pediatric neurology, Part II: Handbook of clinical neurology. Amsterdam: Elsevier BV; 2013. p. 975–91.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of NeurosurgeryAlder Hey Children’s NHS Foundation Trust, LiverpoolMerseysideUK

Personalised recommendations