Tetrasomy 9p caused by idic (9) (pter→q13→pter)

Abstract
Cytogenetic investigation on a malformed male infant showed an extra chromosome similar to chromosome 9 in all metaphases studied. GTG, CBG, and G‐11 staining suggested that the extra chromosome was an abnormal 9, permitting the identification of the chromosome constitution as 47,XY, +idic (9) (pter→q13→pter).