what is SCM type 1
two hemicords separated by osteocartilaginous septum with individual dural sheath
what is scm type 2
two hemicords in same dural envilope with fibrus sheath separation
embyonic origing for SCM1 and SCM 2
perisistant neuroenteric canal betweek yolk salk and amnion
what causes dermal sinus tract
incomplete disjunction of ectoderm and neuroectodem
when to worry about a scoliotic curve
left thoracic curve
age less than 11
sever curve 57 degress compared to 28 for other
rapid progression (28 degress a year)