INSTABILITY OF LYMPHOCYTE CHROMOSOMES IN A GIRL WITH ROTHMUND-THOMSON SYNDROME

被引:35
作者
ORSTAVIK, KH
MCFADDEN, N
HAGELSTEEN, J
ORMEROD, E
VANDERHAGEN, CB
机构
[1] UNIV OSLO,ULLEVAL HOSP,DEPT DERMATOL,N-0407 OSLO,NORWAY
[2] UNIV OSLO,ULLEVAL HOSP,DEPT PAEDIAT,N-0407 OSLO,NORWAY
关键词
D O I
10.1136/jmg.31.7.570
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Rothmund-Thomson syndrome is a rare autosomal recessive syndrome characterised by poikiloderma of the face and extremities, alopecia, short stature, and skeletal defects. We report a patient with the characteristic features of Rothmund-Thomson syndrome who also had lymphocyte chromosome abnormalities. She has a small flat face with short palpebral fissures and micrognathia together with severe skeletal abnormalities of the upper extremities with absence of both radii, short dysmorphic ulnae, a rudimentary right thumb, and aplasia of the left thumb. She also has anal atresia with a rectovaginal fistula. From the age of 3 months she developed poikiloderma skin changes on the face and extensor surfaces of the extremities. Mental development seems to be normal. Lymphocyte chromosomes in the neonatal period showed an unidentified marker chromosome in eight of a total of 32 cells. A repeat analysis at the age of 10 months showed three abnormal cells out of 100 analysed: 47,XX,- 7,+ i(7q),+ 7p, 46,XX, t(3;18)(p14.2;q22), and 49,XX, +del(3) (p11.2), + mar, + mar. A skin biopsy from an affected area showed poor growth and five of 48 cells analysed had structural abnormalities. The father had one of 48 cells with an additional marker chromosome and two cells with different 7;14 translocations. The abnormal chromosome complements in lymphocytes indicate that there may be in vivo chromosome instability in Rothmund-Thomson syndrome.
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页码:570 / 572
页数:3
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