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Novel KIF11 Variants with New Clinical Features: Expanding the Clinical Phenotype

Open Access
|Oct 2025

Figures & Tables

Figure 1.

Clinical Features of Patient 2. a, b. Facial phenotype of Patient 2. Note broad nasal tip, anteverted nares, upslanted palpebral fissures, retrognathia and prominent ears. c. Lymphedema of the dorsum of the foot and hypoplasic toenails.
Clinical Features of Patient 2. a, b. Facial phenotype of Patient 2. Note broad nasal tip, anteverted nares, upslanted palpebral fissures, retrognathia and prominent ears. c. Lymphedema of the dorsum of the foot and hypoplasic toenails.

Figure 2.

Pedigree of affected family and sanger sequencing data of the KIF11 gene NM_004523.4: c.2946dup (p.Leu983SerTer6) variant.
Pedigree of affected family and sanger sequencing data of the KIF11 gene NM_004523.4: c.2946dup (p.Leu983SerTer6) variant.

Figure 3.

Sanger sequencing chromatograms of Patient 1 and his pa rents were obtained. Patient 1 carried the NM_004523.4:c.2224_2225del (p.Asn742TyrfsTer6) variant in the KIF11 gene. This variant was identified as de novo, and no deletion was observed in the sequences of either parent.
Sanger sequencing chromatograms of Patient 1 and his pa rents were obtained. Patient 1 carried the NM_004523.4:c.2224_2225del (p.Asn742TyrfsTer6) variant in the KIF11 gene. This variant was identified as de novo, and no deletion was observed in the sequences of either parent.

Clinical Features of patients With KIF11 variants_

Patient 1Patient 2Patient 3Patient 4Patient 5Patient 6Patient 7
Nucleotide variantc.2224_2225delc.2946dupTc.2946dupTc.2946dupTc.2946dupTc.2946dupTc.2946dupT
Protein alterationp.Asn742TyrfsTer6p.Leu983SerfsTer6p.Leu983SerfsTer6p.Leu983SerfsTer6p.Leu983SerfsTer6p.Leu983SerfsTer6p.Leu983SerfsTer6
InheritanceDe novoMaternalMaternalMaternalMaternalMaternalNA
Microcephaly(−3 SDS)(−2.15 SDS)(+)(+)(+)(+)(+)
Eye abnormalitiesMyopia, Astigmatism, Keratoconus, Bilateral optic nerve hypoplasia, Bilateral staphyloma(−)Myopia(−)Cataract, Severe vision lossSevere vision lossNA
Lymphedema(−)Dorsal pedal lymphedema(−)(−)(−)(−)(−)
Intellectual disabilityModerate(−)(−)(−)SevereSevereMild
SeizuresAfebrile seizures(−)(−)(−)(−)(−)(−)
Dysmorphic findingsSloping forehead, synophrysis, bilateral esotropia, retrognathia and clinodactyly of the fifth fingerUpslanting palpebral fissures, anteverted nares and broad nasal tip, retrognathia, prominent ears, hypoplasic toenailsNA(−)NANANA
Additional clinical featuresIncreased periorbital CSF distance on brain MRI, TantrumsCraniosynostosis(−)(−)Craniosynostosis(−)(−)
Language: English
Published on: Oct 8, 2025
Published by: Macedonian Academy of Sciences and Arts
In partnership with: Paradigm Publishing Services
Publication frequency: 2 times per year

© 2025 T Apuhan, A Saglam Kubra, M Yilmaz, O Bebek, S.A Demiroglu, O Demir, H.A Cebi, A Turkyilmaz, published by Macedonian Academy of Sciences and Arts
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.