Dermal sinus. Definition

Medical Definition: dermal sinus

Dermal invagination forming a tract covered with stratified squamous epithelium, more or less permeable, which is located on or in the vicinity of the midline. The most common location is the lumbosacral level and occipital. It is produced by the interposition of mesenchyme between the ectoderm and the neural tube epineural. Sometimes the hole out hair or skin exudates. Produces certain symptoms when it infects: recurrent meningitis and abscesses. In spinal location can communicate with spina bifida.

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