^a)This frequency was reported by Smith et al. [121]. ^b)Data are extrapolated by Koh et al. [122]. ^c)The frequency was reported in Mauritzson et al. [123]. ^d)Abnormalities of the chromosome 17 such as 17q (del or t), 17p (del or t), -17 are detectable but rare. [124]. ^e)The frequency refers to 11q- in Mauritzson et al. [123]. Abbreviations: MDS, myelodysplastic syndrome; del, deletion; t, translocation; I, isochromosome; inv, inversion; idic, isodicentric; NA, not applicable.