title: Tail stump syndrome associated with chromosomal translocation in two brothers attempting intracytoplasmic sperm injection.
abstract: OBJECTIVE
  To raise the possibility that a familial chromosomal translocation associated with teratozoospermia can disrupt a gene necessary for flagellum assembly.
  
  
  METHODS
  Case report.
  
  
  METHODS
  University hospital.
  
  
  METHODS
  Two brothers with infertility related to anomalies of meiotic division and of the flagella assembly, presenting the same balanced 5-12 autosomal translocation.
  
  
  METHODS
  Several intracytoplasmic sperm injection (ICSI) cycles in our IVF department for both couples.
  
  
  METHODS
  Sperm analysis, karyotypes, electron microscopy, and fluorescence in situ hybridization (FISH) analysis of spermatozoa performed using probes coding for chromosomes X, Y, 13, 18, and 21.
  
  
  RESULTS
  In both brothers, sperm analysis indicated a tail stump syndrome. Electron microscopy analysis displayed complex abnormalities, which were probably related to meiotic errors. The FISH analysis indicated an increase of diploid germ cells. Karyotypes of both patients revealed the same balanced chromosomal t(5;12) (p15.1; q21) translocation. Results of ICSI cycles were comparable for both couples. A twin pregnancy was achieved in one of these two couples, but a spontaneous miscarriage occurred at 10 weeks of gestation.
  
  
  CONCLUSIONS
  The flagella anomalies raise the possibility that the translocation disrupts a gene necessary for the flagellum assembly, although a mutation in a gene unrelated to the chromosome breakpoints cannot be excluded.
authors.affiliation: AP-HP, Hôpital Tenon, Service d'Histologie Biologie de la Reproduction Cytogénétique, Paris, France.
authors.forename: Celia
authors.initials: C
authors.lastname: Ravel
authors.forename: Sandra
authors.initials: S
authors.lastname: Chantot-Bastaraud
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Siffroi
authors.forename: Denise
authors.initials: D
authors.lastname: Escalier
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Antoine
authors.forename: Jacqueline
authors.initials: J
authors.lastname: Mandelbaum
mesh_terms: D000328:Adult; D002869:Chromosome Aberrations; D020022:Genetic Predisposition to Disease / Q000235:genetics; D006801:Humans; D007248:Infertility, Male / Q000235:genetics* / Q000473:pathology* / Q000628:therapy; D008297:Male; D009845:Oligospermia / Q000235:genetics* / Q000473:pathology* / Q000628:therapy; D035781:Siblings; D020554:Sperm Injections, Intracytoplasmic; D013082:Sperm Tail / Q000473:pathology*; D013577:Syndrome