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Suprasellar Germinoma
Joseph Junewick, MD FACR
over 6 years ago
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Dermal Sinus Tract

Case Detail

Anatomy: Brain-Spine
Junewick
Joseph Junewick, MD FACR
Diagnostic Category: Developmental or Congenital
Created: over 6 years ago
Updated: over 6 years ago
Tags: PEDS
Modality/Study Types: MR
Activities:
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History

5 month old female with draining cutaneous lesion.


Case Images


Diagnosis

Dermal Sinus Tract

Findings

MR – Sagittal T1 and axial and coronal T2 images demonstrate a tubular fluid signal lesion extending from the skin through the dura just below the dural vein confluence.

Discussion

Dermal sinuses are thought to be the result of incomplete separation of the neural tube from overlying ectoderm at 3-5 weeks of gestation (incomplete dysjunction). Dermal sinuses may occur at any level of the neuraxis although most occur at the caudal neuropore or rostral neuropore. In the spine, the dermal sinus usually penetrates between two laminae and enters the dura immediately beneath the cutaneous lesion. Dermoid or epidermoid tumors may occur anywhere along the dermal sinus because of trapped ectodermal and/or mesodermal elements.

Reference

Barkovich AJ, Edwards MS, Cogen PH. MR evaluation of spinal dermal sinus tracts in children AJNR (1991); 12(1):123-129.



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