The elongator complex consists of 6 highly conserved subunit proteins and is indispensable for various cellular functions, such as transcription elongation, histone acetylation, and tRNA modification. The elongator complex contains 2 subunits, each of which consists of 3 different proteins (encoded by the ELP1-3 and ELP4-6 genes). According to the OMIM database, ELP2 gene variations have been reported to be associated with autosomal recessive mental retardation type 58. Here, we report a male patient with severe intellectual disability, spastic diplegia, and stereotypic behavior; in addition, we also provide a review of the current literature. Using whole-exome sequencing analysis, we detected a novel compound heterozygous variation in the ELP2 gene. We present this case report to clarify the clinical findings of a very rare neurodevelopmental phenotype and to contribute new information to the current literature on genotype-phenotype correlations.Peroxisomal disorders are a heterogeneous group of inborn errors of metabolism that result in impaired function of the peroxisome. Within this, single enzyme deficiencies are known to cause a constellation of symptoms not very different from the peroxisome biogenesis defects. Thus, there is a need to identify features that differentiate the two. We present 3 molecularly confirmed families 1 with Acyl CoA oxidase deficiency and 2 with D-bifunctional protein deficiency. The clinical, biochemical, and radiological features of these patients have been discussed. We attempt to highlight the overlap in facial features as well as strikingly similar MRI findings of cerebellar atrophy and white matter hyperintensities. This unique clinical profile will not only help in reaching a quick diagnosis, but in this era of variants of uncertain significance, it will prove as supporting evidence. Finally, we expand the genotypic spectrum with a description of 3 homozygous novel mutations (HSD17B4 c.670C>T, c.1807T>C; ACOX1 1.03-kb exonic deletion) and discuss the role of protein modeling its establishing pathogenicity.Congenital cataract, which refers to lenticular opacity diagnosed at birth or more commonly during the first year of life, is one of the leading causes of childhood blindness. Molecular understanding of the disease pathogenesis has evolved thanks to many studies based on modern technologies. In this study, we aimed to identify and discuss the molecular etiology of nonsyndromic or nonmetabolic bilateral congenital cataract by whole-exome sequencing (WES). Patients with bilateral congenital cataract presumed to be isolated after metabolic and genetic evaluation were enrolled in the study. Tocilizumab molecular weight All patients underwent detailed ophthalmological examination and bilateral cataract surgery. DNA samples of the probands, parents, and available affected family members were analyzed by WES. Variants were validated and confirmed by Sanger sequencing in all probands and in available affected family members. A total of 4 patients (3 girls and 1 boy) were recruited. Two patients had nuclear, 1 patient had total, and 1 patient had combined lamellar and sutural cataract. One family had consanguinity. A heterozygous c.215+1G>A mutation in CRYBA1, heterozygous c.432C>G (p.Tyr144Ter) mutation in CRYGC, heterozygous c.70A>C (p.Pro24Thr) mutation in CRYGD, and a heterozygous c.466G>A (p.Gly156Arg) mutation in CRYBB3 were detected. All these mutations were confirmed by Sanger sequencing in selected affected individuals. The current study identified all causative mutations of congenital cataract in the crystalline genes. The results confirmed that WES is a very useful tool in the investigation of the diseases with heterogeneous genetic background.Mowat-Wilson syndrome (MWS) is a rare autosomal dominant syndrome characterized by distinctive facial features, congenital heart defects, Hirschsprung disease, genitourinary anomalies, various structural brain anomalies, and intellectual disability. Pathogenic mutations that result in haploinsufficiency in the ZEB2 gene cause MWS. In this study, we aimed to evaluate the clinical features and molecular analysis results of 4 MWS patients. All patients were examined by an expert clinical geneticist. Dysmorphological abnormalities were recorded. Data including demographic, clinical, and laboratory findings were obtained from hospital records. ZEB2 gene analysis was performed using a Sanger sequencing method. All patients had typical facial features of MWS such as widely spaced eyes, broad eyebrows with a medial flare, low-hanging columella, prominent or pointed chin, open-mouth expression, and uplifted earlobes. Four different heterozygous mutations were identified; 2 mutations were frameshift (c.246_247delGGinsC, c.980_980delG), 1 was nonsense (c.2083C>T), and 1 was splice site (c.808-2A>G). Two of them (c.246_247delGGinsC, c.980_980delG) have not been previously reported in the literature. By defining 2 novel mutations, this study contributes to the molecular spectrum of MWS, while also providing a further insight for genetic counseling. It also demonstrates the importance of dysmorphological examination in clinical diagnosis.Monosomy 1p36 syndrome is one of the most common submicroscopic deletion syndromes, which is characterized by the presence of delayed developmental milestones, intellectual disability, and clinically recognizable dysmorphic craniofacial features. The syndrome comprises 4 cytogenetic groups including pure terminal deletions, interstitial deletions, complex rearrangements, and derivative chromosomes 1 due to unbalanced translocations, where unbalanced translocations represent the least percentage of all cases of monosomy 1p36 (7%). Most patients with monosomy 1p36 due to an unbalanced translocation can be cytogenetically diagnosed using conventional techniques. However, chromosomal microarray analysis is mandatory in these cases to detect copy number variance and size of the deletion and allows for setting a phenotype-genotype correlation. Here, we studied a 1.5-year-old female patient who showed intellectual disability, delayed milestones, hypotonia, seizures, and characteristic dysmorphic features including brachycephaly, straight eyebrows, deep-set eyes, downslanting palpebral fissures, midface hypoplasia, depressed nasal bridge, long philtrum, and pointed chin.