[A new case of partial monosomy of chromosome 12,del(12)(p11.01 to p12.109) confirming the location of the gene for lactate dehydrogenase B].

: A new case of partial monosomy of the short arm of chromosome 12 is described in a 17-year-old girl and compared with other observations reported in the literature. The breakpoints were localized to region 12p11----12p.12.1. Qualitative and quantitative activity of LDHB allowed a precise assignment of the structural gene to sub-band 12p12.2.