Q91 - Trisomy 18 and Trisomy 13 Q91 - Trisomy 18 and Trisomy 13
Q91.0 - Trisomy 18, nonmosaicism (meiotic nondisjunction) Q91.1 - Trisomy 18, mosaicism (mitotic nondisjunction) Q91.2 - Trisomy 18, translocation Q91.3 - Trisomy 18, unspecified Q91.4 - Trisomy 13, nonmosaicism (meiotic nondisjunction) Q91.5 - Trisomy 13, mosaicism (mitotic nondisjunction) Q91.6 - Trisomy 13, translocation Q91.7 - Trisomy 13, unspecified