| | LOC129932539, LOC129932540 +1148 more | Copy number gain | See cases | |
| | LOC120893174, LOC122149340 +166 more | Copy number loss | See cases | |
| | | Single nucleotide variant (missense variant +1 more) | not specified | |
| | | Single nucleotide variant (missense variant +1 more) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Insertion (frameshift variant) | Neurodevelopmental disorder | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | Neurodevelopmental disorder | |
| | | Single nucleotide variant (intron variant) | not provided | |
| | | Single nucleotide variant (intron variant) | not provided | |
| | | Single nucleotide variant (nonsense) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | KIF21B, LOC126805976 (V1458M +1 more) | Single nucleotide variant (missense variant) | not specified | |
| | KIF21B, LOC126805976 (T1447M +1 more) | Single nucleotide variant (missense variant) | not specified | |
| | KIF21B, LOC126805976 (V1422I +1 more) | Single nucleotide variant (missense variant) | KIF21B-related Neurodevelopmental disorder | |
| | KIF21B, LOC126805976 (A1416T +1 more) | Single nucleotide variant (missense variant) | not specified | |
| | KIF21B, LOC126805976 (M1413T +1 more) | Single nucleotide variant (missense variant) | not specified | |
| | KIF21B, LOC126805976 (G1398S +1 more) | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | KIF21B-related disorder | |
| | KIF21B, LOC129932203 (V1323I +1 more) | Single nucleotide variant (missense variant) | not provided | |
| | KIF21B, LOC129932203 (W1320* +1 more) | Single nucleotide variant (nonsense) | not provided | |
| | KIF21B, LOC129932203 (M1319L +1 more) | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (nonsense) | not provided | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (intron variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | Long QT syndrome | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided +1 more | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Duplication (frameshift variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Deletion (frameshift variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | KIF21B-related disorder | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | See cases | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | KIF21B-related Neurodevelopmental disorder +1 more | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Deletion (frameshift variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (missense variant) | not specified | |
| | | Single nucleotide variant (synonymous variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not provided | |
| | | Single nucleotide variant (missense variant) | not specified | |