Identification of a DNA methylation episignature for recurrent constellations of embryonic malformations.

The term "recurrent constellations of embryonic malformations" (RCEM) is used to describe a number of multiple malformation associations that affect three or more body structures. The causes of these disorders are currently unknown, and no diagnostic marker has been identified. Consequently, providing a definitive diagnosis in suspected individuals is challenging. In this study, genome-wide DNA methylation analysis was conducted on DNA samples obtained from the peripheral blood of 53 individuals with RCEM characterized by clinical features recognized as VACTERL and/or oculoauriculovertebral spectrum association. We identified a common DNA methylation episignature in 40 out of the 53 individuals. Subsequently, a sensitive and specific binary classifier was developed based on the DNA methylation episignature. This classifier can facilitate the use of RCEM episignature as a diagnostic biomarker in a clinical setting. The study also investigated the functional correlation of RCEM DNA methylation relative to other genetic disorders with known episignatures, highlighting the common genomic regulatory pathways involved in the pathophysiology of RCEM.

Fetal phenotype and diagnosis of autosomal dominant Robinow syndrome due to novel DVL1 variant.

Due to abnormal prenatal ultrasound findings of femoral shortening and flattened facial profile, a G2P0 pregnant patient underwent an amniocentesis at 15 weeks of gestation for proband-only exome sequencing. Bioinformatic filtering for genes included on the laboratory's extended skeletal dysplasia panel identified a heterozygous, likely pathogenic, frameshift variant in DVL1 NM_001330311.2:c.1575_1582dup; (p.Pro528ArgfsTer149). Pathogenic variants in DVL1 are associated with autosomal dominant Robinow syndrome (ADRS), a genetic disorder characterized by skeletal dysplasia with genital and craniofacial abnormalities. Prenatal ultrasound in the third trimester noted shortened long bones (first percentile for gestational age), macrocephaly with frontal bossing, short and upturned nose with a wide nasal root, triangular mouth, low pedal arches concerning for rocker-bottom feet, and ambiguous genitalia. A postnatal exam by Medical Genetics confirmed the prenatal findings in addition to hypertelorism, brachydactyly with broad thumbs and halluces, clinodactyly of second fingers, rigid gums with a frontal frenulum, and a sacral dimple. This case describes a novel variant in DVL1 identified in a fetus with prenatal and postnatal phenotypic features consistent with ADRS. To our knowledge, this is the first reported case of a prenatal molecular diagnosis of the dominant form of Robinow syndrome and the third case to describe prenatal ultrasound findings associated with this diagnosis.

Prenatal diagnosis of a skeletal disorder characterized by rhizomelic shortening of limbs caused by compound heterozygous variants in the PKDCC gene: Case report and literature review.

BACKGROUND: The protein kinase domain containing cytoplasmic (PKDCC) gene (OMIM#618821) is associated with bone development. Biallelic variants in the PKDCC gene can cause rhizomelic limb shortening with dysmorphic features. CASE REPORT: A fetus was found to be rhizomelic limb shortening at 16 weeks of gestation and amniocentesis was performed at 19 weeks of gestation. Genomic DNA extracted from the amniotic fluid was subjected to chromosomal microarray analysis (CMA), and Trio-total whole-exome sequencing (Trio-WES). Sanger sequencing was used to verify the candidate pathogenic variants. CMA was normal, while Trio-WES identified two compound heterozygous variants in the PKDCC gene, namely c.417_c.423delCGGCGCG insTCATGGGCTCAGTACAC(p.G140fs*35) and c.345G>A (p.W115*,379). Then the fetus was aborted and the development of its bone cells were compared with that of a normal fetus of similar gestational age by histopathological examination. Clinical findings of the fetus were shortening humerus and femur, synophrys, much hair on the side face, simian line on the right palm, etc. Histopathological examination showed that the affected fetus had increased proliferative chondrocytes, widened proliferative bands, and delayed bone mineralization. CONCLUSIONS: We reported a prenatal case of rhizomelic shortening of limbs caused by compound heterozygous variants in the PKDCC gene, which emphasized the important role of Trio-WES for diagnosis of skeletal dysplasia in fetuses.

Adams-Oliver syndrome associated with refractory glaucoma.

Adams-Oliver syndrome (AOS) is a rare inherited disorder characterized by aplasia cutis congenita, cutis marmorata telangiectatica congenita, and terminal limb defects. Ocular associations have been rarely reported. We report a 6-month-old boy with AOS associated with refractory glaucoma, megalocornea, and anterior polar cataract. To our knowledge, this is the first case of glaucoma to be reported in association with AOS.

Expanding the phenotypic spectrum of NOTCH1 variants: clinical manifestations in families with congenital heart disease.

Pathogenic variants in NOTCH1 are associated with non-syndromic congenital heart disease (CHD) and Adams-Oliver syndrome (AOS). The clinical presentation of individuals with damaging NOTCH1 variants is characterized by variable expressivity and incomplete penetrance; however, data on systematic phenotypic characterization are limited. We report the genotype and phenotype of a cohort of 33 individuals (20 females, 13 males; median age 23.4 years, range 2.5-68.3 years) from 11 families with causative NOTCH1 variants (9 inherited, 2 de novo; 9 novel), ascertained from a proband with CHD. We describe the cardiac and extracardiac anomalies identified in these 33 individuals, only four of whom met criteria for AOS. The most common CHD identified was tetralogy of Fallot, though various left- and right-sided lesions and septal defects were also present. Extracardiac anomalies identified include cutis aplasia (5/33), cutaneous vascular anomalies (7/33), vascular anomalies of the central nervous system (2/10), Poland anomaly (1/33), pulmonary hypertension (2/33), and structural brain anomalies (3/14). Identification of these findings in a cardiac proband cohort supports NOTCH1-associated CHD and NOTCH1-associated AOS lying on a phenotypic continuum. Our findings also support (1) Broad indications for NOTCH1 molecular testing (any familial CHD, simplex tetralogy of Fallot or hypoplastic left heart); (2) Cascade testing in all at-risk relatives; and (3) A thorough physical exam, in addition to cardiac, brain (structural and vascular), abdominal, and ophthalmologic imaging, in all gene-positive individuals. This information is important for guiding the medical management of these individuals, particularly given the high prevalence of NOTCH1 variants in the CHD population.

Expansion of the core features of VACTERL association to include genital anomalies.

Genital anomalies have been reported with VACTERL association but not considered a core feature. Acute and chronic complications stemming from unrecognized genital anomalies have been reported in adolescents and young adults with VACTERL association. We sought to determine the frequency and severity of genital anomalies in VACTERL patients and identify which core features were more frequently associated with genital anomalies. A retrospective chart review from January 2010 to October 2021 identified 211 patients with two or more core VACTERL features, 34% of whom had a genital anomaly. The majority of genital anomalies (83% of those in males and 90% in females) were classified as functionally significant (requiring surgical intervention or causing functional impairment). The frequency of genital anomalies in the VACTERL cohort was higher if anorectal malformations or renal anomalies were present in both males and females and if vertebral anomalies were present in females. Due to their functional significance, genital anomalies should be assessed in all patients with two or more core features of VACTERL association, especially in those with anorectal or renal anomalies. Most genital anomalies in males will be detected on physical examination but additional investigation is often needed to detect genital anomalies in females. The timing and type of investigation are subjects for future study.

A Population-Based Cohort Study on Diagnosis and Early Management of Anorectal Malformation in the UK and Ireland.

BACKGROUND: This study describes the presentation and initial management of anorectal malformation (ARM); evaluating the frequency, causes and consequences of late diagnosis. METHODS: A prospective, population cohort study was undertaken for newly diagnosed ARMs in the UK and Ireland from 01/10/2015 and 30/09/2016. Follow-up was completed at one year. Data are presented as n (%), appropriate statistical methods used. Factors associated with late diagnosis; defined as: detection of ARM either following discharge or more than 72 h after birth were assessed with univariable logistic regression. RESULTS: Twenty six centres reported on 174 cases, 158 of which were classified according to the type of malformation and 154 had completed surgical data. Overall, perineal fistula was the most commonly detected anomaly 43/158 (27%); of the 41 of these children undergoing surgery, 15 (37%) had a stoma formed. 21/154 (14%, CI95{9-20}) patients undergoing surgery experienced post-operative complications. Thirty-nine (22%) were diagnosed late and 12 (7%) were detected >30 days after birth. Factors associated with late diagnosis included female sex (OR 2.06; 1.0-4.26), having a visible perineal opening (OR 2.63; 1.21-5.67) and anomalies leading to visible meconium on the perineum (OR 18.74; 2.47-141.73). 56/174 (32%) had a diagnosis of VACTERL association (vertebral, anorectal, cardiac, tracheal, oesophageal, renal and limb); however, not all infants were investigated for commonly associated anomalies. 51/140 (36%) had a cardiac anomaly detected on echocardiogram. CONCLUSION: There is room for improvement within the care for infants born with ARM in the UK and Ireland. Upskilling those performing neonatal examination to allow timely diagnosis, instruction of universal screening for associated anomalies and further analysis of the factors leading to clinically unnecessary stoma formation are warranted. LEVEL OF EVIDENCE: II (Prospective Cohort Study <80% follow-up).

[A Uncommon Case: Kasabach-Merritt syndrome with VACTERL Association]. / Ein seltener Fall: Kasabach-Merrit-Syndrom bei VACTERL-Assoziation.

The Kasabach-Merrit syndrome is characterized as the association of a vascular tumor, typically a caposiform hemangioendothelioma and rarely a tufted hemangioma, and a severe consumptive coagulopathy with potentially life-threatening thrombocytopenia. The severe coagulopathy with increased bleeding tendency must be considered before invasive procedures and often requires repeated platelet concentrate substitutions. We present a case of a mature male neonate with Kasabach-Merritt- Syndrome as well as VACTERL association. The VACTERL association describes a group of malformations. Our patient presented with anal atresia combined with tethered cord, and left renal agenesis. The VACTERL association as well as Kasabach-Merritt syndrome were found to be independent pathologies within this patient. A common occurrence or an association with each other has not been described in the literature so far. The challenging coagulation setting due to severe thrombocytopenia complicated the surgical management so far. Finally, mTOR-inhibitor sirolimus was successful in terms of tumor reduction and especially reduction of platelet consumption.

Limb-body wall complex: Literature review and case report.

INTRODUCTION: Body wall anomalies comprise a wide range of malformations. Limb-Body wall complex (LBWC) represents the most severe presentation of this group, with life threatening malformations in practically all the cases, including craniofacial, body wall defects, and limb anomalies. There is no consensus about its etiology and folding and gastrulation defects have been involved. Also, impaired angiogenesis has been proposed as a causative process. CASE REPORT: We present the case of a masculine stillborn, product of the first pregnancy in a 15-year-old, apparently healthy mother. He was delivered at 31 weeks of gestation due to an early rupture of membranes. He presented with multiple malformations including a wide body wall defect with multiple organ herniation and meromelia of the lower right limb. DISCUSSION AND CONCLUSIONS: LBWC represents a severe and invariably fatal pathology. There are no described risk factors, nevertheless, this case presented in a teenage mother, a well-described risk factor for other body wall anomalies. Its diagnosis allows us to discriminate between other pathologies that require prenatal or postnatal specialized treatment.

SALL4 deletion and kidney and cardiac defects associated with VACTERL association.

Congenital anomalies of the kidney and urinary tract (CAKUT) can be a part of the VACTERL association, which represents the non-random combination of the following congenital anomalies: vertebral anomalies, anal anomalies, cardiac anomalies, tracheal-esophageal anomalies, kidney anomalies, and limb anomalies. VACTERL association is generally considered to be a non-genetic condition. Exceptions include a patient with a heterozygous nonsense SALL4 variant and anal stenosis, tetralogy of Fallot, sacro-vertebral fusion, and radial and thumb anomalies. SALL4 encodes a transcription factor that plays a critical role in kidney morphogenesis. Here, we report a patient with VACTERL association and a heterozygous 128-kb deletion spanning SALL4 who presented with renal hypoplasia, radial and atrio-septal defects, and patent ductus arteriosus. The present report of SALL4 deletion, in addition to a previously reported patient with VACTERL association phenotype and SALL4 nonsense mutation, further supports the notion that SALL4 haploinsufficiency can lead to VACTERL association.

Monodactyly in a patient with CHARGE syndrome: An additional case report.

CHARGE syndrome is a rare autosomal dominant syndrome characterized by multiple congenital anomalies including coloboma, heart defects, ear anomalies, and developmental delay, caused by pathogenic variants in the CHD7 gene. The discovery of the molecular basis of this syndrome increased the number of cases reported and expanded the phenotype and clinical variability. Limb anomalies are occasional clinical findings in this syndrome, present in about 30% of reported cases. The occurrence of limb anomalies in this syndrome suggests that it should be considered as part of the phenotypic spectrum. Here, we describe an individual with CHARGE syndrome presenting unilateral monodactyly.

Split-hand/foot malformation 3 resulting from microduplications in 10q24 region in five patients from India.

Split-hand/foot malformation (SHFM) is a genetically heterogeneous congenital limb reduction defect characterized by the deficiencies of central rays of the autopod. Tandem duplications at 10q24 locus account for approximately 20% of all SHFM cases. Here, we report five affected individuals from four unrelated Indian families with SHFM3 caused by microduplication of 10q24 locus showing varied clinical presentations. This report substantiates and extends the current understanding of this rare, multifaceted, and complex condition.

Substantial incidence of bladder dysfunction in patients with VACTERL association: Implications for surveillance.

VACTERL association is defined as the nonrandom co-occurrence of a minimum of three of the following six key components: Vertebral anomalies, Anal atresia, Cardiac malformations, Tracheo-Esophageal fistula, Renal anomalies, and Limb abnormalities. Patients presenting with two components may also belong in the same spectrum. Additional components have been associated with VACTERL defects, including single umbilical artery, tethered spinal cord (TSC), and genital malformations. We observed a significant proportion of patients with bladder dysfunction (often called neurogenic bladder in the medical record) when reviewing a cohort of patients with VACTERL defects at our clinical center. Our finding calls attention to bladder dysfunction as an additional VACTERL phenotypic component. The prevalence of bladder dysfunction is greatest in those with genital anomalies, anorectal malformations, sacral dysplasia, renal anomalies, and TSC. We propose that patients with two or more VACTERL malformations be monitored for symptoms of bladder dysfunction if one or more of the identified risk factors are present until the achievement of urinary continence.

Screening for VACTERL Anomalies in Children with Anorectal Malformations: Outcomes of a Standardized Approach.

PURPOSE: The majority of patients with an anorectal malformation (ARM) have associated congenital anomalies. It is well established that all patients diagnosed with an ARM should undergo systematic screening, including renal, spinal, and cardiac imaging. This study aimed to evaluate the findings and completeness of screening, following local implementation of standardized protocols. METHODS: A retrospective cohort study was performed assessing all patients with an ARM managed at our tertiary pediatric surgical center, following a standardized protocol implementation for VACTERL screening (January 2016-December 2021). Cohort demographics, medical characteristics, and screening investigations were analyzed. Findings were compared with our previously published data (2000-2015), conducted prior to protocol implementation. RESULTS: One hundred twenty-seven (64 male, 50.4%) children were eligible for inclusion. Complete screening was performed in 107/127 (84.3%) children. Of these, one or more associated anomalies were diagnosed in 85/107 (79.4%), whilst the VACTERL association was demonstrated in 57/107 (53.3%). The proportion of children that underwent complete screening increased significantly in comparison with those assessed prior to protocol implementation (RR 0.43 [CI 0.27-0.66]; p < 0.001). Children with less complex ARM types were significantly less likely to receive complete screening (p = 0.028). Neither presence of an associated anomaly, nor prevalence of the VACTERL association, differed significantly by ARM type complexity. CONCLUSION: Screening for associated VACTERL anomalies in children with ARM was significantly improved following standardized protocol implementation. The prevalence of associated anomalies in our cohort supports the value of routine VACTERL screening in all children with ARM, regardless of malformation type. LEVEL OF EVIDENCE: II.

Robinow Syndrome: A Rare Diagnosis from Pakistan.

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Severe Adams-Oliver Syndrome after Maternal COVID-19 Infection Could Be Another Effect of the SARS-CoV-2 Inflammatory Storm? Case Report.

Background. Adams-Oliver syndrome is a congenital disease whose main findings are aplasia cutis congenita of the scalp and terminal transverse limb defects. The pathogenesis is unknown, but it is postulated that ischemic events in susceptible tissues cause the lesions in the embryonic period.Case report. We present a newborn with a severe phenotype of Adams-Oliver syndrome. The infant's mother had a SARS-CoV-2 infection in the first trimester of pregnancy. Prenatal ultrasound indicates a probable worsening of the disease after the first trimester.Conclusion. This study shows a previously unpublished severe AOS phenotype in a term newborn. There are some signs that the disease could have progressed beyond the first trimester, either spontaneously or by the inflammatory mechanisms of SARS-CoV-2.

ERI1: A case report of an autosomal recessive syndrome associated with developmental delay and distal limb abnormalities.

ERI1 is an evolutionary conserved 3'-5' exonuclease with an important function in multiple RNA processing pathways. Although the molecular mechanisms in which ERI1 is involved have been studied extensively in model organisms, the pathology associated with ERI1 variants in humans has remained elusive because no case has been reported so far. Here, we present a case of a female patient with a homozygous nonsense variant in ERI1 gene. The patient exhibits mild intellectual disability, eyelid ptosis, and anomalies in her hands and feet (brachydactyly, clinodactyly, dysplastic/short nail of halluces, brachytelephalangy, short metacarpals, and toe syndactyly). This case report is the first of its kind and is invaluable for understanding ERI1 pathology in humans.

Retrospective evaluation of clinical and molecular data of 148 cases of esophageal atresia.

Developmental abnormalities provide a unique opportunity to seek for the molecular mechanisms underlying human organogenesis. Esophageal development remains incompletely understood and elucidating causes for esophageal atresia (EA) in humans would contribute to achieve a better comprehension. Prenatal detection, syndromic classification, molecular diagnosis, and prognostic factors in EA are challenging. Some syndromes have been described to frequently include EA, such as CHARGE, EFTUD2-mandibulofacial dysostosis, Feingold syndrome, trisomy 18, and Fanconi anemia. However, no molecular diagnosis is made in most cases, including frequent associations, such as Vertebral-Anal-Cardiac-Tracheo-Esophageal-Renal-Limb defects (VACTERL). This study evaluates the clinical and genetic test results of 139 neonates and 9 fetuses followed-up at the Necker-Enfants Malades Hospital over a 10-years period. Overall, 52 cases were isolated EA (35%), and 96 were associated with other anomalies (65%). The latter group is divided into three subgroups: EA with a known genomic cause (9/148, 6%); EA with Vertebral-Anal-Cardiac-Tracheo-Esophageal-Renal-Limb defects (VACTERL) or VACTERL/Oculo-Auriculo-Vertebral Dysplasia (VACTERL/OAV) (22/148, 14%); EA with associated malformations including congenital heart defects, duodenal atresia, and diaphragmatic hernia without known associations or syndromes yet described (65/148, 44%). Altogether, the molecular diagnostic rate remains very low and may underlie frequent non-Mendelian genetic models.