t21 個準確度係極高,行內同過來人相當清楚
純學術討論
T21 overall accuracy / sensitivity係高,但呢個應該係因為aneuploidy拉高?
T21 for AS嘅sensitivity係幾多?
我睇咗一輪paper都搵唔到好嘅data(主要因為AS太rare,啲sample size細得可憐,得兩三個case真係好難draw meaningful conclusions)
而T21同niftypro嘅leaflet都似乎冇寫到同AS有關嘅stat
據
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4036146/
AS嘅pathogenic molecular diagnoses among 286 patients:
31.1% class II deletion, 23.8% class I deletion, 10.8% unspecified deletion, 3.8% atypical deletion, 8.7% UPD, 7.7% imprinting defect, and 11.2% UBE3A mutation
assuming the cohort is representative of the population,
class I & class II deletion > 3MB所以T21會包
for the sake of argument,
atypical or unspecified deletion都當佢 > 3MB,
當佢UPD都發現到
同埋當T21對deletion & UPD AS嘅sensitivity係100%
噉at least IPD同UBE3A mutation嘅~20%應該係唔會detect到?