Hari Verdhman,9 yrs old child,presents with scoliosis,hairy tuft in the skin of back and neurological deficit.Plain X-ray reveal multiple vertebral anomalies and a vertical bony spur overlying lumbar spine on AP view.The most probable diagnosis is:

Hari Verdhman,9 yrs old child,presents with scoliosis,hairy tuft in th

1.	Hari Verdhman,9 yrs old child,presents with scoliosis,hairy tuft in the skin of back and neurological deficit.Plain X-ray reveal multiple vertebral anomalies and a vertical bony spur overlying lumbar spine on AP view.The most probable diagnosis is:
A.	Diastometamyelia
B.	Dorsal dermal sinus
C.	Caudal regresion syndrome
D.	Tight filum terminale
Answer» B. Dorsal dermal sinus