Dorsal dermal sinus
Citation, DOI & case data
Posterior lower cervical dimple.
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Dermal sinus tract extending from the skin surface to the cervical spinal cord at C7 level through a widened C6/7 interspinous space with stretched spinal cord posteriorly towards the dermal sinus tract. Associated small syrinx is noted.
It results from incomplete separation of the superficial ectoderm from the neural ectoderm, resulting in focal segmental adhesion.