PMID- 9531344 OWN - NLM STAT- MEDLINE DCOM- 19980504 LR - 20190705 IS - 0007-1048 (Print) IS - 0007-1048 (Linking) VI - 100 IP - 4 DP - 1998 Mar TI - A de novo translocation 46,X,t(X;15) causing haemophilia B in a girl: a case report. PG - 750-7 AB - Haemophilia B is an X-linked recessive bleeding disorder caused by mutations in the factor IX gene with an incidence of 1:25000-30000. Usually female carriers are clinically normal, and severe phenotypic expression of the disease in females is extremely rare. In this report we describe a girl with a clinically severe course of haemophilia B who had no signs of Turner syndrome or any other dysmorphic features. Cytogenetic and molecular studies in the patient and her parents showed a de novo translocation 46,X,t(X;15)(q27.1;p11.2) in the patient, indicating a possible break near the factor IX gene. The structurally normal X chromosome was late replicating and inactivated in all metaphases as shown by high-resolution R-banding. By fluorescence in situ hybridization (FISH) with YAC and cosmid probes we could further characterize the breakpoint region on the X chromosome and the involvement of the factor IX gene. FAU - Schroder, W AU - Schroder W AD - Ernst-Moritz-Arndt University, Institute for Human Genetics, Greifswald, Germany. FAU - Poetsch, M AU - Poetsch M FAU - Gazda, H AU - Gazda H FAU - Werner, W AU - Werner W FAU - Reichelt, T AU - Reichelt T FAU - Knoll, W AU - Knoll W FAU - Rokicka-Milewska, R AU - Rokicka-Milewska R FAU - Zieleniewska, B AU - Zieleniewska B FAU - Herrmann, F H AU - Herrmann FH LA - eng PT - Case Reports PT - Journal Article PL - England TA - Br J Haematol JT - British journal of haematology JID - 0372544 RN - 9001-28-9 (Factor IX) SB - IM MH - Adult MH - Blood Coagulation MH - Blotting, Southern MH - Chromosomes, Human, Pair 15/*genetics MH - Dosage Compensation, Genetic MH - Exons MH - Factor IX/genetics MH - Female MH - Hemophilia B/blood/*genetics MH - Humans MH - In Situ Hybridization, Fluorescence MH - Pedigree MH - *Translocation, Genetic MH - X Chromosome/*genetics EDAT- 1998/04/08 00:00 MHDA- 1998/04/08 00:01 CRDT- 1998/04/08 00:00 PHST- 1998/04/08 00:00 [pubmed] PHST- 1998/04/08 00:01 [medline] PHST- 1998/04/08 00:00 [entrez] AID - 10.1046/j.1365-2141.1998.00621.x [doi] PST - ppublish SO - Br J Haematol. 1998 Mar;100(4):750-7. doi: 10.1046/j.1365-2141.1998.00621.x.