S. Demczuk et al., MOLECULAR CYTOGENETIC ANALYSIS OF A SERIES OF 23 DIGEORGE-SYNDROME PATIENTS BY FLUORESCENCE IN-SITU HYBRIDIZATION, Annales de genetique, 37(2), 1994, pp. 60-65
The authors have studied a series of 23 DiGeorge syndrome patients by
prometaphase chromosome analysis and/or by FISH with a set of 6 cosmid
probes spanning the previously described commonly deleted region. Fou
r patients display a cytogenetically visible interstitial deletion in
band 22q11.2, whereas the other 18 patients exhibit a molecular deleti
on evidenced only by FISH analysis. For 21 of the patients studied, th
e deletion encompasses the 6 loci tested, while for one, only the most
telomeric of these loci is conserved. The last patient does not show
any deletion with the probes used.