Dermal sinus

Question 1

Dermal sinus pathology

Answer 1

Failure of cutaneous ectoderm to separate from neuro- ectoderm

Question 2

Common location

Answer 2

Lumbosacral

Question 3

Dermal sinus def

Answer 3

Track from skin to neural tube lined with epithelium
Located at end of neural tube cadual or cephalon

Question 4

Sx

Answer 4

Dimple , sinus , hairs , midline 📍
Opening 1-2 mm
Normal or pigmented skin

Question 5

Epidermis cyst

Answer 5

stratified squamous epithelium and containing only keratin from desquamated epithelium

Question 6

dermoid cyst

Answer 6

Line with epithelilum
If the sinus expands
containing skin appendages, such as hair follicles and sebaceous glands) and also containing sebum and hair.

Question 7

Complication

Answer 7

Mei biotic chemical

intrathecal abscess

arachnoiditisif intradural

Question 8

1st presentation of deriomd sinus

Answer 8

Bladder dysfunction

Question 9

pilonidal cysts

Answer 9

contain hair, are located superficial to the postsacral fascia, and may become infected.

Question 10

Dermal sinus course

Answer 10

Cephlic ➡️ occipital sinus comminucate with dermiod cyst cerbllum and 4 th V

Question 11

Imaging

Answer 11

No 🚫 intra cystic or sinus contrast ▶️ infection
US at birth
Then MRI or r/ intradural or intracranial extension

Question 12

TX

Answer 12

Surgical excision befor infection or neurological deficit

Question 13

Surgical technique

Answer 13

If sinus pentriate spine need laminectomy

Question 14

Location of dermiod cyst 📍

Answer 14

Midline

Question 15

Mc organisms infection

Answer 15

S. Aruse