A 5‐month‐old girl with a ring chromosome 7 [46, XX, r(7) (p22q36)I is presented. She was the fifth and youngest patient with this chromosomal anomaly, and the first instance whose chromosomal breakpoints were determined by high resolution banding analysis, Numerous café‐au‐lait‐like pigmentation spots and hypoplasia of the thenar creases were observed.
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Kohyama et al. (1988) studied this question.
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