Pallister-Killian syndrome
...that Pallister-Killian syndrome is a rare congenital genetic disorder that cannot be detected through prenatal blood tests because it occurs only in the chromosomes of skin cells?
...that <b id="mwCCk"><a class="mw-redirect" href="./Pallister-Killian_syndrome" id="mwCCo" rel="mw:WikiLink" title="Pallister-Killian syndrome">Pallister-Killian syndrome</a></b> is a rare <a class="mw-redirect" href="./Congenital_disorder" id="mwCCs" rel="mw:WikiLink" title="Congenital disorder">congenital</a> <a href="./Genetic_disorder" id="mwCCw" rel="mw:WikiLink" title="Genetic disorder">genetic disorder</a> that cannot be detected through <a class="mw-redirect" href="./Prenatal" id="mwCC0" rel="mw:WikiLink" title="Prenatal">prenatal</a> <a href="./Blood_test" id="mwCC4" rel="mw:WikiLink" title="Blood test">blood tests</a> because it occurs only in the <a href="./Chromosome" id="mwCC8" rel="mw:WikiLink" title="Chromosome">chromosomes</a> of <a href="./Skin" id="mwCDA" rel="mw:WikiLink" title="Skin">skin cells</a>?