Novel homozygous TTI2 variant causing autosomal recessive syndromic intellectual disability and primary microcephaly from Pakistan: A case report (exome report)

Authors

Zul Qarnain, Aga Khan University
Fatima Khan, Aga Khan University
Fizza Akbar, Aga Khan UniversityFollow
Salman Kirmani, Aga Khan UniversityFollow

Document Type

Case Report

Department

Medical College Pakistan; Women and Child Health

Abstract

We describe a male patient with a novel TTI2 variant, which has not been previously associated with a human phenotype. His features include intellectual disability, primary microcephaly, delayed psychomotor development, speech delay, short stature, dysmorphic facial features, esotropia, kyphoscoliosis, and behavior abnormalities (Figure). Next generation sequencing revealed autosomal recessive TTI2 variant with uncertain significance, denoted as c.21_22insAAGCGCTCTG (p.Glu8Lysfs × 12). TTI2 encodes a regulator of DNA damage response and helps maintain steady levels of the PIKK family of protein kinases. No disease-causing variants in other genes potentially linked to his clinical presentation were identified. We report a novel loss-of-function homozygous variant in TTI2 that leads to syndromic intellectual disability and primary microcephaly

Comments

Pagination, Volume and Issue no are not provided by the author/publisher

Publication (Name of Journal)

Case reports in genetics

Recommended Citation

Qarnain, Z., Khan, F., Akbar, F., Kirmani, S. (2022). Novel homozygous TTI2 variant causing autosomal recessive syndromic intellectual disability and primary microcephaly from Pakistan: A case report (exome report). Case reports in genetics.
Available at: https://ecommons.aku.edu/pakistan_fhs_mc_mc/307