Lumbar and sacral dermal sinus.

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When in the lumbar and sacral region there are skin signs such as pits, scars, hamartomas and nevi of various type -angioma, lipoma, hypertrichosis, etc.- a dermal sinus should be suspected. The latter belongs to the late defects of the neural tube, due to an altered fusion of the encephalic and medullar structures and/or of the relevant covering structures -bone, meninges, muscle and aponeurosis layers and skin-.


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