Trisomy 1 is a rare chromosomal anomaly and has never been reported in
Korea. Clinical features of
trisomy 1 include
macrocephaly, prominent
forehead, flat nasal
bridge, low set
ears, and
micrognathia, all of which result in a very distinguishable facial structure. A
child with
trisomy 1 also suffers from
mental retardation and/or developmental delays. In this case
report, the
child was diagnosed with de novo
trisomy 1 without receiving any
treatment until visiting our
hospital. The
child suffered from
foot and
ankle deformities, leading her unable to stand independently. Here we
report the surgical
treatment and
rehabilitation treatment that enabled the
child to walk independently.