Table 3
Cellular studies reported (n = 58) in trichothiodystrophy patients
Gene defect
Patients No. (%)
Reduced DNA repair
41 (37)
XPD
32 (29)
XPB
2 (2)
TTD-A
2 (2)
TTDN1
6 (5)
Normal DNA repair; not reported
11 (10); 54 (48)
Total
112 (100)
TTD, trichothiodystrophy; XP, xeroderma pigmentosum.