<unk> s are a group of inherited conditions associated with chromosomal<unk>  and breakage. They often lead to an increased tendency to develop certain types of malignancies. The following<unk> s are known: * Ataxia telangiectasia * Ataxia telangiectasia-like disorder * Bloom syndrome * Fanconi anaemia * Nijmegen breakage syndrome
Chromosome instability syndrome
Chromosomal deletion syndrome
Chromosome 5q deletion syndrome
Ayazi syndrome
Microdeletion syndrome
Marshall–Smith syndrome
Mismatch repair cancer syndrome
Contiguous gene syndrome