A midline dermal sinus may be a sign of an underlying neural tube dysraphism.

Location of a dermal sinus:

(1) nose

(2) occipital scalp

(3) dorsal back overlying the spine



(1) located in the midline

(2) may be draining cerebrospinal fluid (CSF)

(3) may be draining pus if infected

(4) may show a small tuft of hair


The patient may have a history of recurrent bacterial meningitis


The sinus should not be probed.


Imaging studies should be performed to see if there is an underlying skeletal defect.

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