Missed opportunities for HIV testing and sexual health-related challenges in an individual with intellectual disability: a case report.

BACKGROUND: HIV testing remains an important tool in identifying people living with HIV/AIDS (PLWHA). An early diagnosis of HIV can lead to a prolonged life expectancy if treatment is initiated promptly. Indicator conditions can be the first sign of an HIV infection and should therefore be recognised and consequently a HIV test should be carried out. Testing should occur in all individuals as sexuality can be experienced by everyone, and stigma can lead to the exclusion of vulnerable groups, leading to a gap in diagnosis and treatment [1, 2]. CASE PRESENTATION: A 63-year-old man, who identifies as bisexual and has had an intellectual disability since birth, presented at our health care centre for HIV testing. A decade ago, the patient was diagnosed with Stage III Diffuse Large B-cell Non-Hodgkin Lymphoma, an AIDS defining cancer. The patient presented at a Haematology and Oncology department 3 months prior, due to a weight loss of 10 kg over the past 5 months. Oral thrush, an HIV-indicator condition, had been diagnosed by the otolaryngologists shortly before. During this medical evaluation, pancytopenia was identified. Despite the presence of indicator conditions, the patient was never tested for HIV in the past. Staff members from the care facility for intellectually disabled suggested conducting a HIV test in our clinic through the public health department, where HIV positivity was revealed. The AIDS-defining diagnosis, along with a CD4 + cell count of 41/µl, suggests a prolonged period of HIV positivity. CONCLUSION: Due to the presence of existing indicator conditions, an earlier HIV diagnosis was possible. We contend that most of the recent illnesses could have been prevented if earlier testing had been carried out. Therefore, patients presenting with AIDS indicator conditions, including those with mental disabilities, should be given the opportunity to be tested for HIV. HIV/AIDS trainings should be made available to health care professionals as well as to personnel interacting with vulnerable groups.

Wie bewährt sich die Kaufman Assessment Battery for Children-II in der klinischen Anwendungspraxis? Befunde bei 7- bis 12-jährigen Kindern / How Does the Kaufman Assessment Battery for Children-II Stand the Test of Clinical Practice? Findings in 7- To 12-Year-Old Children.

How Does the Kaufman Assessment Battery for Children-II Stand the Test of Clinical Practice? Findings in 7- To 12-Year-Old Children Reliability and validity of the KABC-II were investigated in 646 children aged 7 to 12 years who had been assessed in four social pediatric centers and one pediatric clinic in Germany due to developmental, behavioral, or emotional disorders.The reliability of the global scales Fluid-Crystallized-Index (FCI) and Mental Processing Index (MPI) proved to be very high in all age groups, with values ≥ .96. Reliability values for the scales were above .85 for Sequential/ Gsm and Delayed Recall, and above .90 for the other scales. Relatively higher test scores were found for Learning/Glr in children with intellectual disability than in other scales. Findings for discriminative validity for clinical diagnostic groups and educational backgrounds were as expected, with the lowest intelligence scores for children with intellectual disabilities.The correlation between FCI and the full scale IQ of the SON-R 2.-7 was .73 in a longitudinal subsample. Divergent validity for behavioral variables was confirmed in a subsample by low and nonsignificant correlations with the CBCL/6-18R. With some limitations, psychometric data indicate the suitability of the KABC-II for individual clinical assessment.

A novel variant in ASNS gene responsible for syndromic intellectual disability and microcephaly: Case report and literature review.

BACKGROUND: The ASNS (ASNS, MIM 108370) gene variations are responsible for asparagine synthetase deficiency (ASNSD, MIM 615574), a very rare autosomal recessive disease characterized by cerebral anomalies. These patients have congenital microcephaly, progressive encephalopathy, severe intellectual disability, and intractable seizures. METHOD: Clinical characteristics of the patient were collected. Exome sequencing was used for the identification of variants. Sanger sequencing was used to confirm the variant in the target region. The structure of the protein was checked using the DynaMut2 web server. RESULTS: The proband is an 11-year-old Iranian-Azeri girl with primary microcephaly and severe intellectual disability in a family with a consanguineous marriage. Symptoms emerged around the 10-20th days of life, when refractory epileptic gaze and unilateral tonic-clonic seizures initiated without any provoking factor such as fever. A brain MRI revealed no abnormalities except for brain atrophy. The karyotype was normal. Using exome sequencing, we identified a novel homozygous variant of thymine to adenine (NM_001673.5:c.538T>A) in the ASNS gene. Both parents had a heterozygous variant in this location. Subsequently, Sanger sequencing confirmed this variant. We also reviewed the clinical manifestations and MRI findings of the previously reported patients. CONCLUSION: In the present study, a novel homozygous variant was recognized in the ASNS gene in an Iranian-Azeri girl manifesting typical ASNSD symptoms, particularly intellectual disability and microcephaly. This study expands the mutation spectrum of ASNSD and reviews previously reported patients.

Neurodevelopmental Disorders Including Autism Spectrum Disorder and Intellectual Disability as a Risk Factor for Delayed Diagnosis of Catatonia.

OBJECTIVE: Catatonia is a distinct and severe medical syndrome comprising motor, somatic, and psychiatric symptoms that is reported in upwards of 17% of young patients with autism spectrum disorders. Clinical experience indicates catatonia is often under-recognized in this clinical population. Here we characterize the clinical presentation of catatonia in patients with and without neurodevelopmental disorders (NDDs) including autism, including the time from symptom onset to diagnosis of catatonia. METHOD: Retrospective chart review of electronic medical records at a large, academic pediatric medical center identified 113 pediatric and young adult patients with a charted history of catatonia, as identified by an encounter diagnosis or problem list entry between September 2017 and September 2021. Workup, treatments, and diagnoses (psychiatric, neurodevelopmental, and genetic) were identified. RESULTS: We observed a clear and substantial delay in identification of catatonia in those with NDDs (diagnosis after 330 days for those without psychosis) compared with neurotypical patients (∼16 days). Psychiatry involvement was associated with shorter delays. CONCLUSION: Intellectual disability and autism are risk factors for significantly delayed diagnosis of catatonia. It is unknown whether delayed diagnosis contributes to the difficulty in treating catatonia in this patient population or whether the treatment difficulties relate instead to differential and ongoing biological mechanisms and underlying encephalopathy. Overall, these findings highlight the importance of increased recognition of catatonia symptoms in patients with NDDs and suggest early referral to psychiatric specialists may shorten the delay to diagnosis.

Genetic determinants of global developmental delay and intellectual disability in Ukrainian children.

BACKGROUND: Global developmental delay or intellectual disability usually accompanies various genetic disorders as a part of the syndrome, which may include seizures, autism spectrum disorder and multiple congenital abnormalities. Next-generation sequencing (NGS) techniques have improved the identification of pathogenic variants and genes related to developmental delay. This study aimed to evaluate the yield of whole exome sequencing (WES) and neurodevelopmental disorder gene panel sequencing in a pediatric cohort from Ukraine. Additionally, the study computationally predicted the effect of variants of uncertain significance (VUS) based on recently published genetic data from the country's healthy population. METHODS: The study retrospectively analyzed WES or gene panel sequencing findings of 417 children with global developmental delay, intellectual disability, and/or other symptoms. Variants of uncertain significance were annotated using CADD-Phred and SIFT prediction scores, and their frequency in the healthy population of Ukraine was estimated. RESULTS: A definitive molecular diagnosis was established in 66 (15.8%) of the individuals. WES diagnosed 22 out of 37 cases (59.4%), while the neurodevelopmental gene panel identified 44 definitive diagnoses among the 380 tested patients (12.1%). Non-diagnostic findings (VUS and carrier) were reported in 350 (83.2%) individuals. The most frequently diagnosed conditions were developmental and epileptic encephalopathies associated with severe epilepsy and GDD/ID (associated genes ARX, CDKL5, STXBP1, KCNQ2, SCN2A, KCNT1, KCNA2). Additionally, we annotated 221 VUS classified as potentially damaging, AD or X-linked, potentially increasing the diagnostic yield by 30%, but 18 of these variants were present in the healthy population of Ukraine. CONCLUSIONS: This is the first comprehensive study on genetic causes of GDD/ID conducted in Ukraine. This study provides the first comprehensive investigation of the genetic causes of GDD/ID in Ukraine. It presents a substantial dataset of diagnosed genetic conditions associated with GDD/ID. The results support the utilization of NGS gene panels and WES as first-line diagnostic tools for GDD/ID cases, particularly in resource-limited settings. A comprehensive approach to resolving VUS, including computational effect prediction, population frequency analysis, and phenotype assessment, can aid in further reclassification of deleterious VUS and guide further testing in families.

Measurement of the Neutrophils Count and Oxidative Burst in Neutrophils of Patients with Sanjad Sakati Syndrome.

Sanjad Sakati Syndrome (SSS) is categorized as a neuroendocrine-related disease due to disorders of the nervous and hormonal systems. Since hormonal changes in these patients may affect the nature and function of the immune system. Thus, in this study, cell count and phagocytotic function of neutrophils were evaluated which may be influenced by changes in the hormonal rate and growth factors. In this study, the neutrophil count value and the oxidative burst were evaluated in six patients diagnosed with SSS and six healthy individuals. There was a significant reduction in the neutrophil count observed in SSS patients compared to healthy controls (37.41±7.93 percent vs. 66.5±6.8 percent). However, there was no significant difference in neutrophil oxidative index between patients with SSS and control subjects (172.33±55.08 vs. 217.00±77.38). We concluded that in patients with SSS, the phagocytic activity of neutrophils was not affected by hormonal changes, while the number of neutrophils and neutrophil-to-lymphocyte ratio (NLR) index were decreased.

Relationship between serum cortisol levels, stereotypies, and the presence of autism spectrum disorder in patients with severe intellectual disability.

Stereotypies are one of the diagnostic criteria for autism spectrum disorder (ASD) and are common to both ASD and intellectual disability (ID). Previous studies have been inconclusive, with some showing a positive correlation between stereotypies and cortisol, while others have shown a negative correlation. We hypothesised and investigated the presence of ASD as one of the variables involved in this discrepancy. We tested the following hypotheses on serum cortisol in a total of 84 hospitalised patients with severe ID and ASD with severe ID. Hypothesis (1) Higher levels of stereotypies are associated with higher levels of serum cortisol. Hypothesis (2) The presence of ASD will moderate the association between stereotypies and high serum cortisol levels. The results of the analysis supported hypotheses (1) and (2). We also found that in the population with ID, serum cortisol levels were significantly lower in the ASD group compared to the non-ASD group. The present findings that the association between stereotypies and serum cortisol levels in people with severe ID is moderated by the presence of ASD suggest that the stress response system may function differently in people with ID and ASD than in the general population.

Validation of the German version of the DSQIID in adults with intellectual disabilities.

BACKGROUND: An observer-rated screening questionnaire for dementia for people with intellectual disabilities (ID), DSQIID, was developed in the UK. So far, the German version has not yet been validated in adults with ID. AIMS/METHODS: We validated a German version of DSQIID (DSQIID-G) among adults with ID attending a German clinic. PROCEDURES/OUTCOMES: DSQIID-G was completed by the caregivers of 104 adults with ID at baseline (T1), 94 at six months (T2) and 83 at 12 months (T3). A Receiver Operating Curve (ROC) was used to determine the total DSQIID-G cutoff score for the best fit between sensitivity and specificity. RESULTS: Sixteen of the 104 participants at T1 (15%) received a diagnosis of dementia. At T1, the scores among the non-dementia group ranged from 0 to 33 (mean: 6.7; SD: 7.65), and the dementia group ranged from 3 to 43 (mean: 22.12; SD: 11.6). The intergroup difference was statistically significant (W: 158; p < .001) (AUC:.89). A total score of 9 provided the best fit between sensitivity (.94) and specificity (.72). CONCLUSIONS AND IMPLICATIONS: DSQIID-G total score can discriminate between dementia and non-dementia cases in adults with ID. A lower cutoff score with a higher sensitivity is desirable for a screening instrument.

Rare neurodevelopmental conditions and parents' mental health - how and when does genetic diagnosis matter?

BACKGROUND: Parents of individuals with rare neurodevelopmental conditions and intellectual disabilities (ID) are vulnerable to mental health difficulties, which vary between parents and within parents over time. The underlying cause of a child's condition can influence parents' mental health, via uncertain pathways and within unknown time-windows. RESULTS: We analysed baseline data from the IMAGINE-ID cohort, comprising 2655 parents of children and young people with ID of known genetic origin. First, we conducted a factor analysis of the SDQ Impact scale to isolate specific pathways from genetic aetiology to parents' mental health. This suggested a two-factor structure for the SDQ Impact scale, with a "home & distress" dimension and a "participation" dimension. Second, we tested via structural equation modelling (SEM) whether genetic diagnosis affects Impact and mental health directly, or indirectly via children's characteristics. This analysis identified an indirect pathway linking genetic aetiology to parents' mental health, serially through child characteristics (physical disabilities, emotional and behavioural difficulties) and Impact: home & distress. Third, we conducted moderation analysis to explore the influence of time elapsed since genetic diagnosis. This showed that the serial mediation model was moderated by time since diagnosis, with strongest mediating effects among recently diagnosed cases. CONCLUSIONS: There are multiple steps on the pathway from ID-associated genetic diagnoses to parents' mental health. Pathway links are strongest within 5 years of receiving a genetic diagnosis, highlighting opportunities for better post-diagnostic support. Recognition and enhanced support for children's physical and behavioural needs might reduce impact on family life, ameliorating parents' vulnerabilities to mental health difficulties.

A cohort study of neurodevelopmental disorders and/or congenital anomalies using high resolution chromosomal microarrays in southern Brazil highlighting the significance of ASD.

Chromosomal microarray (CMA) is the reference in evaluation of copy number variations (CNVs) in individuals with neurodevelopmental disorders (NDDs), such as intellectual disability (ID) and/or autism spectrum disorder (ASD), which affect around 3-4% of the world's population. Modern platforms for CMA, also include probes for single nucleotide polymorphisms (SNPs) that detect homozygous regions in the genome, such as long contiguous stretches of homozygosity (LCSH). These regions result from complete or segmental chromosomal homozygosis and may be indicative of uniparental disomy (UPD), inbreeding, population characteristics, as well as replicative DNA repair events. In this retrospective study, we analyzed CMA reading files requested by geneticists and neurologists for diagnostic purposes along with available clinical data. Our objectives were interpreting CNVs and assess the frequencies and implications of LCSH detected by Affymetrix CytoScan HD (41%) or 750K (59%) platforms in 1012 patients from the south of Brazil. The patients were mainly children with NDDs and/or congenital anomalies (CAs). A total of 206 CNVs, comprising 132 deletions and 74 duplications, interpreted as pathogenic, were found in 17% of the patients in the cohort and across all chromosomes. Additionally, 12% presented rare variants of uncertain clinical significance, including LPCNVs, as the only clinically relevant CNV. Within the realm of NDDs, ASD carries a particular importance, owing to its escalating prevalence and its growing repercussions for individuals, families, and communities. ASD was one clinical phenotype, if not the main reason for referral to testing, for about one-third of the cohort, and these patients were further analyzed as a sub-cohort. Considering only the patients with ASD, the diagnostic rate was 10%, within the range reported in the literature (8-21%). It was higher (16%) when associated with dysmorphic features and lower (7%) for "isolated" ASD (without ID and without dysmorphic features). In 953 CMAs of the whole cohort, LCSH (≥ 3 Mbp) were analyzed not only for their potential pathogenic significance but were also explored to identify common LCSH in the South Brazilians population. CMA revealed at least one LCSH in 91% of the patients. For about 11.5% of patients, the LCSH suggested consanguinity from the first to the fifth degree, with a greater probability of clinical impact, and in 2.8%, they revealed a putative UPD. LCSH found at a frequency of 5% or more were considered common LCSH in the general population, allowing us to delineate 10 regions as potentially representing ancestral haplotypes of neglectable clinical significance. The main referrals for CMA were developmental delay (56%), ID (33%), ASD (33%) and syndromic features (56%). Some phenotypes in this population may be predictive of a higher probability of indicating a carrier of a pathogenic CNV. Here, we present the largest report of CMA data in a cohort with NDDs and/or CAs from the South of Brazil. We characterize the rare CNVs found along with the main phenotypes presented by each patient and show the importance and usefulness of LCSH interpretation in CMA results that incorporate SNPs, as well as we illustrate the value of CMA to investigate CNV in ASD.

[Cancer in people with an intellectual disability in Germany: prevalence, genetics, and care situation]. / Krebserkrankungen bei Menschen mit einer Intelligenzminderung in Deutschland: Prävalenzen, Genetik und Versorgungslage.

Intellectual disability has a prevalence rate of approximately 1% of the population; in Germany, this is around 0.5-1 million people. The life expectancy of this group of people is reduced, with cancer being one of the most common causes of death (approx. 20%). Overall, the risk of cancer and mortality is increased compared to the general population.Certain genetic syndromes predispose to cancer in this vulnerable group, but associated comorbidities or lifestyle could also be risk factors for cancer. People with cognitive impairments are less likely to attend preventive check-ups, and challenges arise in medical care due to physical, communicative, and interactional characteristics. Optimized cooperation between clinical centers for people with disabilities and the respective cancer centers is required in order to tailor the processes to the individual.In Germany, there is a lack of data on the prevalence of cancer entities and the use and need for healthcare services. There is an urgent need to focus attention on cancer prevention, treatment, and research in the vulnerable and heterogeneous group of people with intellectual disabilities suffering from cancer in order to effectively counteract the increase in cancer-related deaths in this population group.The article summarizes specialist knowledge on cancer in people with an intellectual disability, identifies special features of treatment, presents care structures, and derives specific requirements for clinics and research.

Clinical and genetic characterization of 47 Chinese pediatric patients with Pitt-Hopkins syndrome: a retrospective study.

BACKGROUND: Pitt-Hopkins syndrome (PTHS) is a neurodevelopmental disorder that remains underdiagnosed and its clinical presentations and mutation profiles in a diverse population are yet to be evaluated. This retrospective study aims to investigate the clinical and genetic characteristics of Chinese patients with PTHS. METHODS: The clinical, biochemical, genetic, therapeutic, and follow-up data of 47 pediatric patients diagnosed with PTHS between 2018 and 2021 were retrospectively analyzed. RESULTS: The Chinese PTHS patients presented with specific facial features and exhibited global developmental delay of wide severity range. The locus heterogeneity of the TCF4 gene in the patients was highlighted, emphasizing the significance of genetic studies for accurate diagnosis, albeit no significant correlations between genotype and phenotype were observed in this cohort. The study also reports the outcomes of patients who underwent therapeutic interventions, such as ketogenic diets and biomedical interventions. CONCLUSIONS: The findings of this retrospective analysis expand the phenotypic and molecular spectra of PTHS patients. The study underscores the need for a long-term prospective follow-up study to assess potential therapeutic interventions.

Diagnostic Overshadowing of Psychological Disorders in People With Intellectual Disability: A Systematic Review.

Diagnostic overshadowing is a bias in which symptoms of a psychological disorder are falsely attributed to a known diagnosis of intellectual disability. This systematic review evaluated all research on diagnostic overshadowing conducted to date, including dissertations and peer-reviewed journal articles. In total, 25 studies were included in this review. Findings suggest diagnostic overshadowing may not be as ubiquitous as originally believed, with one third of included studies finding no overshadowing. The quality of the evidence was graded as "Low" using the LEGEND tool, with common issues including outdated studies, analogue methodologies, small sample sizes and convenience samples, and inappropriate conducting or reporting of statistical analyses. Implications for the field and recommendations for future research are discussed.

Variants in KMT2A in Three Individuals with Previous Suspicion of 22q11.2 Deletion Syndrome.

The condition known as 22q11.2 deletion syndrome (MIM #188400) is a rare disease with a highly variable clinical presentation including more than 180 features; specific guidelines for screening individuals have been used to support clinical suspicion before confirmatory tests by Brazil's Craniofacial Project. Of the 2568 patients listed in the Brazilian Database on Craniofacial Anomalies, 43 individuals negative for the 22q11.2 deletion syndrome were further investigated through whole-exome sequencing. Three patients (6.7%) presented with heterozygous pathogenic variants in the KMT2A gene, including a novel variant (c.6158+1del) and two that had been previously reported (c.173dup and c.3241C>T); reverse phenotyping concluded that all three patients presented features of Wiedemann-Steiner syndrome, such as neurodevelopmental disorders and dysmorphic facial features (n = 3), hyperactivity and anxiety (n = 2), thick eyebrows and lower-limb hypertrichosis (n = 2), congenital heart disease (n = 1), short stature (n = 1), and velopharyngeal insufficiency (n = 2). Overlapping features between 22q11.2 deletion syndrome and Wiedemann-Steiner syndrome comprised neuropsychiatric disorders and dysmorphic characteristics involving the eyes and nose region; velopharyngeal insufficiency was seen in two patients and is an unreported finding in WDSTS. Therefore, we suggest that both conditions should be included in each other's differential diagnoses.

Further Delineation of Clinical Phenotype of ZMYND11 Variants in Patients with Neurodevelopmental Dysmorphic Syndrome.

Intellectual disability with speech delay and behavioural abnormalities, as well as hypotonia, seizures, feeding difficulties and craniofacial dysmorphism, are the main symptoms associated with pathogenic variants of the ZMYND11 gene. The range of clinical manifestations of the ZMYND phenotype is constantly being expanded by new cases described in the literature. Here, we present two previously unreported paediatric patients with neurodevelopmental challenges, who were diagnosed with missense variants in the ZMYND11 gene. It should be noted that one of the individuals manifested with hyperinsulinaemic hypoglycaemia (HH), a symptom that was not described before in published works. The reason for the occurrence of HH in our proband is not clear, so we try to explain the origin of this symptom in the context of the ZMYND11 syndrome. Thus, this paper contributes to knowledge on the range of possible manifestations of the ZMYND disease and provides further evidence supporting its association with neurodevelopmental challenges.

Hemizygous splicing variant in CNKSR2 results in X-linked intellectual developmental disorder.

BACKGROUND: Intellectual disability (ID) refers to a childhood-onset neurodevelopmental disorder with a prevalence of approximately 1%-3%. METHODS: We performed whole exome sequencing for the patient with ID. And the splicing variant we found was validated by minigene assay. RESULTS: Here, we report a boy with ID caused by a variant of CNKSR2. His neurological examination revealed hypsarrhythmia via electroencephalography and a right temporal polar arachnoid cyst via brain magnetic resonance imaging. A novel splicing variant in the CNKSR2 gene (NM_014927.5, c.1657+1G>A) was discovered by exome sequencing. The variant caused a 166 bp intron retention between exons 14 and 15, which was validated by a minigene assay. The variant was not reported in public databases such as gnomAD and the Exome Aggregation Consortium. CONCLUSIONS: The variant was predicted to be damaging to correct the translation of the CNKRS2 protein and was classified as likely pathogenic according to the ACMG guidelines.

Novel variants in TNRC6B cause global developmental delay with speech and behavioral abnormalities, short stature, low body weight, café-au-lait spots, and metabolic abnormality.

BACKGROUND: TNRC6B deficiency syndrome, also known as global developmental delay with speech and behavioral abnormalities (MIM 619243), is a rare autosomal dominant genetic disease mainly characterized by facial dysmorphism, developmental delay/intellectual disability (DD/ID), speech and language delay, fine and motor delay, attention deficit and hyperactivity disorder (ADHD), and variable behavioral abnormalities. It is caused by heterozygous variant in the TNRC6B gene (NM_001162501.2, MIM 610740), which encodes the trinucleotide repeat-containing adaptor 6B protein. METHODS: In this study, two Chinese patients with TNRC6B deficiency syndrome were recruited, and genomic DNA extraction from peripheral blood leukocytes of these parents and their family members was extracted for whole-exome sequencing and Sanger sequencing. RESULTS: Here, we report two unrelated Chinese patients diagnosed with TNRC6B deficiency syndrome caused by novel de novo likely pathogenic or pathogenic TNRC6B variants c.335C>T (p.Pro112Leu) and c.1632delC (p.Leu546fs*63), which expands the genetic spectrum of TNRC6B deficiency syndrome. The clinical features of the patients were DD/ID, delayed speech, ADHD, behavioral abnormalities, short stature, low body weight, café-au-lait spots, metabolic abnormalities, and facial dysmorphism including coarse facial features, sparse hair, frontal bossing, hypertelorism, amblyopia, strabismus, and downslanted palpebral fissures, which expands the phenotype spectrum associated with TNRC6B deficiency syndrome. CONCLUSION: This study expands the genotypic and phenotypic spectrum of TNRC6B deficiency syndrome. Our findings indicate that patients with TNRC6B deficiency syndrome should be monitored for growth and metabolic problems and therapeutic strategies should be developed to address these problems. Our report also suggests the clinical diversity of TNRC6B deficiency syndrome.

A de novo variant in ZBTB18 gene caused autosomal dominant non-syndromic intellectual disability 22 syndrome: A case report and literature review.

RATIONALE: Autosomal dominant non-syndromic intellectual disability 22 is a rare genetic disorder caused by the ZBTB18 gene. This disorder affects various parts of the body, leading to intellectual disability. It is noteworthy that only 31 cases of this disorder have been reported thus far. As the symptom severity may differ, doctors may face challenges in diagnosing it accurately. It is crucial to be familiar with this disorder's symptoms to receive proper diagnosis and essential medical care. PATIENT CONCERNS: There is a case report of a 6-year-old boy who had an unexplained thyroid abnormality, global developmental delay, and an abnormal signal of white matter in brain MRI. However, he did not have growth retardation, microcephaly, corpus callosum hypoplasia, epilepsy, or dysmorphic facial features. Clinical whole exome sequencing revealed a de novo pathogenic variant in the ZBTB18 gene (c.1207delC, p. Arg403Alafs*60), which is a previously unreported site. This variant causes the premature termination of peptide chain synthesis, leading to incomplete polypeptide chains. DIAGNOSES: Autosomal dominant non-syndromic intellectual and disability 22 syndrome and thyroid dysfunction. INTERVENTIONS: Rehabilitation training. OUTCOMES: The individual is experiencing difficulty with their motor skills, appearing clumsier while running. He struggles with expressing themselves and forming complete sentences, relying mostly on gestures and pointing. LESSONS: The clinical presentations of mental retardation, autosomal dominant, type 22 (MRD22) are complicated and varied. Although early diagnosis can be made according to typical clinical symptoms, whole exome sequencing is necessary for diagnosing MRD22, as our study indicates.

The first Turkish family with a novel biallelic missense variant of the ALKBH8 gene: A study on the clinical and variant spectrum of ALKBH8-related intellectual developmental disorders.

ABH8, the protein encoded by the ALKBH8 gene, modifies tRNAs by methylating their anticodon wobble uridine residues. The variations in the ALKBH8 gene are associated with the "intellectual developmental disorder, autosomal recessive type 71" (MIM: 618504) phenotype in the OMIM database. This phenotype is characterized by global developmental delay, facial dysmorphic features, and psychiatric problems. To date, 12 patients from five distinct families carrying variants of the ALKBH8 gene have been reported in the literature. In the present study, we report the first Turkish family harboring a novel homozygous missense variant, NM_138775.3:c.1874G > C (p.Arg625Pro), in the last exon of the ALKBH8 gene. Two affected siblings in this family showed signs of global developmental delay and intellectual disability. Based on the dysmorphological assessment of the cases, fifth finger clinodactyly and fetal fingertip pads were prominent, in addition to the dysmorphic findings similar to those reported in previous studies. Minor dysmorphic limb anomalies in relation to this phenotype have not yet been previously reported in the literature. Our computational studies revealed the potential deleterious effects of the Arg-to-Pro substitution on the structure and stability of the ABH8 methyltransferase domain. In the present report, the first Turkish family with an ultrarare disease associated with the ALKBH8 gene was reported, and a novel deleterious variant in the ALKBH8 gene and additional clinical features that were not reported with this condition have been reported.

Profiles of Autistic Youth with and Without Co-occurring Behavioral Health and Neurodevelopmental Disorders: A Latent Class Analysis.

OBJECTIVE: Autism spectrum disorder (ASD) diagnosis relies on clinical observation and documentation, but the presence of comorbidities can affect diagnostic validity across clinicians and exacerbate access to timely care. This study used latent class analysis to optimize subgroup identification based on functional level and associated comorbidities using the Behavior Assessment System for Children, Third Edition (BASC-3), and Vineland Adaptive Behavior Scales, Third Edition (Vineland-3), in a pediatric population referred for autism evaluation. METHODS: This retrospective study reviewed clinical data extracted over a 3-year period (2018-2021). A latent class analysis was used to explore the presence of latent groups guided by the likelihood ratio test and fit indices. Additional analyses contrasted ASD and non-ASD groups on the BASC-3 and Vineland-3 variables. RESULTS: There were 191 included participants (mean age 65.9 months, 76.4% male), of whom over half (60.7%) had an ASD diagnosis. Using 185 cases, the exploratory latent class analysis showed the emergence of 4 distinct subgroups. Composition of classes varied on ASD diagnosis, neurodevelopmental difficulties, behavioral health concerns, and intellectual disability. When contrasting ASD and non-ASD groups, significant between-group differences were observed across Vineland-3 variables and BASC-3 adaptive skills subscales indicating poorer social and adaptive functioning. CONCLUSION: Latent class analysis of commonly used behavioral and adaptive measures can help distinguish between subgroups of pediatric patients referred for ASD evaluations and assist in triage of cases based on severity.