Q91.0
Trisomi 18, meiotisk nondisjunction
Q91.1
Trisomi 18, mosaicism (mitotisk nondisjunction)
Q91.2
Trisomi 18, translokation
Q91.3
Trisomi 18, ospecificerad
Q91.4
Trisomi 13, meiotisk nondisjunction
Q91.5
Trisomi 13, mosaicism (mitotic nondisjunction)
Q91.6
Trisomi 13, translokation
Q91.7
Trisomi 13, ospecificerad