Displasia frontonasal / Frontonasal dysplasia

Los trastornos del desarrollo son aquellos padecimientos que se manifiestan por defectos en la embriogénesis de la región afectada. La cara del ser humano comienza su formación alrededor de la cuarta semana de vida intrauterina y se manifiesta gracias a la fusión de cinco prominencias: dos pares conocidas como maxilar y mandibular, y una impar conocida como frontonasal. Cuando esta fusión no se lleva a cabo de una forma óptima, aparecen numerosas alteraciones del desarrollo como el labio y paladar hendido, y la displasia frontonasal. La displasia frontonasal produce frecuentemente afecciones oculares, nasales y orales. Dentro de las manifestaciones orales destacan una forma atípica de hendidura labial o palatina, afecciones dentales y alteraciones en el crecimiento de la cara. Dada la gran relación que este padecimiento tiene con la cavidad oral resulta importante que el odontólogo conozca la etiología y las características clínicas de este trastorno (AU)

Developmental disorders are those conditions that are manifested by defects in the embryogenesis of the affected region. The human face begins its formation around the fourth week of intrauterine life and is manifested thanks to the fusion of five prominences: two pairs known as maxillary and mandibular and odd one known as frontonasal. When this fusion is not carried out in an optimal way, numerous developmental alterations appear, such as cleft lip and palate and frontonasal dysplasia. Frontonasal dysplasia frequently produces ocular, nasal and oral affections. Among the oral manifestations, and atypical form of clef lip and/or palate, dental affections and alterations in the growth of the face stand out. Given the great relationship that this condition has with the oral cavity, it is important for the dentist to know the etiology and clinical characteristics of this disorder (AU)

Analysis of genetic variants in a child with Intellectual developmental disorder with behavioral abnormalities and craniofacial dysmorphism without seizures / 中华医学遗传学杂志

OBJECTIVE@#To explore the clinical phenotype and genetic characteristics of a child with Intellectual developmental disorder with behavioral abnormalities and craniofacial malformations without epilepsy (IDDBCS).@*METHODS@#A child who had visited the Lianyungang Maternal and Child Health Care Hospital in April 2021 was selected as the study subject. Clinical data of the child were collected. Genomic DNA was extracted from peripheral blood samples of the child and his parents and subjected to whole exome sequencing (WES). Candidate variants were verified by Sanger sequencing of his family members.@*RESULTS@#The child, a 3-year-and-4-month-old male, had presented with global developmental delay and cranial malformation. Genetic testing revealed that he has harbored a heterozygous c.1703delA (p.K568Sfs9) variant of the PHF21A gene, for which both of his parents were of the wild type. This low-frequency variant may alter the structure and function of the protein product. Based on the guidelines from the American College of Medical Genetics and Genomics (ACMG), it was classified as a pathogenic variant (PVS1+PS2+PM2_Supporting).@*CONCLUSION@#The heterozygous c.1703delA (p.K568Sfs9) variant of the PHF21A gene probably underlay the IDDBCS in this patient.

A case of intellectual developmental disorder with behavioral abnormalities and craniofacial dysmorphism with or without seizures caused by PHF21A gene variation and review of literature / 中华儿科杂志

Objective: To discuss the clinical and genetic features of intellectual developmental disorder with behavioral abnormalities and craniofacial dysmorphism with or without seizures (IDDBCS). Methods: The clinical and genetic records of a patient who was diagnosed with IDDBCS caused by PHF21A gene variation at Children's Hospital Capital Institute of Pediatrics in 2021 were collected retrospectively. Using " PHF21A gene" as the keyword, relevant articles were searched at CNKI, Wanfang Data and PubMed from establishment of databases to February 2023. Clinical and genetic features of IDDBCS were summarized in the combination of this case. Results: An 8 months of age boy showed overgrowth (height, weight and head circumference were all higher than the 97th percentile of children of the same age and sex) and language and motor developmental delay after birth, and gradually showed autism-like symptoms like stereotyped behavior and poor eye contact. At 8 months of age, he began to show epileptic seizures, which were in the form of a series of spastic seizures with no reaction to adrenocorticotropic hormone but a good response to vigabatrin. Physical examination showed special craniofacial appearances including a prominent high forehead, sparse eyebrows, broad nasal bridge, and downturned mouth with a tent-shaped upper lip. The patient also manifested hypotonia. Whole exome sequencing showed a de novo heterogeneous variant, PHF21A (NM_001101802.1): c.54+1G>A, and IDDBCS was diagnosed. A total of 6 articles (all English articles) were collected, involving this case and other 14 patients of IDDBCS caused by PHF21A gene variation. Clinical manifestations were intellectual disability or developmental delay (15 patients), craniofacial anomalies (15 patients), behavioral abnormalities (12 patients), seizures (9 patients), and overgrowth (8 patients). The main pathogenic variations were frameshift variations (8 patients). Conclusions: IDDBCS should be considered when patients show nervous developmental abnormalities, craniofacial anomalies, seizures and overgrowth. PHF21A gene variation detection helps to make a definite diagnosis.

Clinical and genetic analysis of three children patients with Kleefstra syndrome / 中华医学遗传学杂志

OBJECTIVE@#To explore the genetic basis of three children with unexplained developmental delay/intellectual disability (DD/ID).@*METHODS@#Peripheral blood samples were collected from the patients and subjected to chromosomal microarray analysis (CMA).@*RESULTS@#Patient 1 was found to harbor a 190 kb deletion at 9q34.3, which encompassed most of EHMT1 (OMIM 607001), the key gene for Kleefstra syndrome (OMIM 610253). Patients 2 and 3 were siblings. CMA showed that they have shared four chromosomal copy number variations (CNVs) including a deletion at 9q34.3 which spanned 154 kb and 149 kb, respectively, and encompassed the EHMT1 and CACNA1B (OMIM 601012) genes. The remaining 3 CNVs were predicted to be with no clinical significance.@*CONCLUSION@#Microdeletions at 9q33.4 probably underlay the pathogenesis of DD/ID in the three children, for which EHMT1 may be the key gene.

Is there a relationship between complaints of impaired balance and postural control disorder in community-dwelling elderly women? A cross-sectional study with the use of posturography

Background: Risk of falls increases as age advances. Complaints of impaired balance are very common in the elderly age group. Objectives: The objective of this study was to investigate whether the subjective perception of impaired balance was associated with deficits in postural control (objective analysis) in elderly community-dwelling women. Method: Static posturography was used in two groups: elderly women with (WC group) and without (NC group) complaints of impaired balance. The area, mean sway amplitude and mean speed of the center of pressure (COP) in the anterior-posterior (AP) and medial-lateral (ML) directions were analyzed in three stances: single-leg stance, double-leg stance and tandem stance, with eyes open or closed on two different surfaces: stable (firm) and unstable (foam). A digital chronometer was activated to measure the time limit (Tlimit) in the single-leg stance. Kruskal-Wallis tests followed by Mann-Whitney tests, Friedman analyses followed by post hoc Wilcoxon tests and Bonferroni corrections, and Spearman statistical tests were used in the data analysis. Differences of p<0.05 were considered statistically significant. Results: The results of posturography variables revealed no differences between groups. The timed single-leg stance test revealed a shorter Tlimit in the left single-leg stance (p=0.01) in WC group compared to NC group. A negative correlation between posturography variables and Tlimit was detected. Conclusions: Posturography did not show any differences between the groups; however, the timed single-leg stance allowed the authors to observe differences in postural control performance between elderly women with and those without complaints of impaired balance. .

The First Korean Patient with Potocki-Shaffer Syndrome: A Rare Cause of Multiple Exostoses

Potocki-Shaffer syndrome (PSS, OMIM #601224) is a rare contiguous gene deletion syndrome caused by haploinsufficiency of genes located on the 11p11.2p12. Affected individuals have a number of characteristic features including multiple exostoses, biparietal foramina, abnormalities of genitourinary system, hypotonia, developmental delay, and intellectual disability. We report here on the first Korean case of an 8-yr-old boy with PSS diagnosed by high resolution microarray. Initial evaluation was done at age 6 months because of a history of developmental delay, hypotonia, and dysmorphic face. Coronal craniosynostosis and enlarged parietal foramina were found on skull radiographs. At age 6 yr, he had severe global developmental delay. Multiple exostoses of long bones were detected during a radiological check-up. Based on the clinical and radiological features, PSS was highly suspected. Subsequently, chromosomal microarray analysis identified an 8.6 Mb deletion at 11p11.2 [arr 11p12p11.2 (Chr11:39,204,770-47,791,278)x1]. The patient continued rehabilitation therapy for profound developmental delay. The progression of multiple exostosis has being monitored. This case confirms and extends data on the genetic basis of PSS. In clinical and radiologic aspect, a patient with multiple exostoses accompanying with syndromic features, including craniofacial abnormalities and mental retardation, the diagnosis of PSS should be considered.

The First Korean Patient with Potocki-Shaffer Syndrome: A Rare Cause of Multiple Exostoses

Potocki-Shaffer syndrome (PSS, OMIM #601224) is a rare contiguous gene deletion syndrome caused by haploinsufficiency of genes located on the 11p11.2p12. Affected individuals have a number of characteristic features including multiple exostoses, biparietal foramina, abnormalities of genitourinary system, hypotonia, developmental delay, and intellectual disability. We report here on the first Korean case of an 8-yr-old boy with PSS diagnosed by high resolution microarray. Initial evaluation was done at age 6 months because of a history of developmental delay, hypotonia, and dysmorphic face. Coronal craniosynostosis and enlarged parietal foramina were found on skull radiographs. At age 6 yr, he had severe global developmental delay. Multiple exostoses of long bones were detected during a radiological check-up. Based on the clinical and radiological features, PSS was highly suspected. Subsequently, chromosomal microarray analysis identified an 8.6 Mb deletion at 11p11.2 [arr 11p12p11.2 (Chr11:39,204,770-47,791,278)x1]. The patient continued rehabilitation therapy for profound developmental delay. The progression of multiple exostosis has being monitored. This case confirms and extends data on the genetic basis of PSS. In clinical and radiologic aspect, a patient with multiple exostoses accompanying with syndromic features, including craniofacial abnormalities and mental retardation, the diagnosis of PSS should be considered.

Diagnóstico clínico y molecular de síndrome de cefalopolisindactilia de Greig. A propósito de un caso. / Clinical and molecular cephalopolysyndactyly Greig syndrome. A case report

El síndrome de cefalopolisindactilia de Greig (SCPG) es una afección autosómica dominante caracterizada por polidactilia o sindactilia de manos y pies, macrocefalia, hipertelorismo y ocasionalmente anomalías cerebrales y retraso mental. Es un síndrome poco frecuente, heredado según un patrón autosómico dominante. La prevalencia es ignorada, siendo conocidos 100 casos aproximadamente. Más del 75 % de los pacientes con manifestaciones clínicas características de SCPG presentan mutaciones en el gen GLI3. El diagnóstico presuntivo de SCPG puede realizarse cuando el paciente presenta la tríada clásicade polidactilia, hipertelorismo y macrocefalia, siendo indicativo para la realización del análisis molecular del gen GLI3. En este trabajo se describe el caso de un niño referido al Instituto de Genética Médica con diagnóstico clínico de polidactilia y macrocefalia. Las características clínico-evolutivas e imagenológicas del paciente permitieron postular el diagnóstico de SCPG. El análisis molecular del gen GLI3 confirmó el diagnóstico de SCPG identificando la mutación c.1850_1852 del GTTinsAT (p.R617LfsX11) en el exón 12 del gen GLI3. Se trata de una mutación no descrita previamente como una mutación asociada al desarrollo de SCPG; no obstante, al tratarse de una mutación que provoca una proteína truncada desde el exón 12 del gen GLI3, no existen muchas dudas sobre su patogenicidad. Este resultado tiene implicaciones hereditarias y familiares permitiendo un adecuado asesoramiento genético en el contexto familiar.

Síndrome otopalatodigital tipo II, aproximación prenatal y diagnóstico clínico de un caso complejo de displasia ósea / Prenatal diagnosis of otopalatodigital syndrome type 2

El síndrome otopalatodigital tipo 2 (OPD2), es una rara entidad con herencia recesiva ligada al cromosoma X, letal, caracterizada por facies anormales con hipoplasia centrofacial, hipertelorismo ocular, paladar hendido, talla baja, huesos largos curvos, sindactilia en pies y manos y anomalías óseas. Usualmente originadas en mutaciones en el gen de la filamina A (FLNA). Se reporta un caso, con diagnóstico prenatal de osteocondrodisplasia que posteriormente por hallazgos al examen físico y radiológicos del recién nacido se clasifico como síndrome otopalatodigital tipo 2.

Otopalatodigital syndrome, type 2 (OPD2), is a rare entity with recessive heredity linked to the X chromosome, lethal, characterized by abnormal facies, with centro-facial hypoplasia, ocular hypertelorism, cleft palate, low height, curved long bones, syndactyly, and osseous anomalies on feet and hands. It has been recently shown that patients with OPD2 with mutations in the filamin A gene (FLNA), which is also found altered in allelic entities like the OPD1 syndrome, the Melnik-Needles syndrome and frontometaphyseal dysplasia. Herein, we report a case with prenatal osteochondrodysplasia diagnosis that after physical and radiological exam of the newborn was classified as otopalatodigital syndrome type 2.

Mulibrey nanism in a 35 year-old iranian female with constrictive pericarditis

Mulibrey nanism is a rare autosomal recessive disorder characterized by severe growth retardation and pericardial constriction associated with muscle, liver, brain, and eye abnormalities. More than 80% of previously reported cases are Finnish. We report a 35-year-old Iranian female who presented with classic phenotypic features of Mulibrey nanism with symptomatic constrictive pericarditis and underwent pericardiectomy .Our case is one of the rare examples of Mulibrey nanism outside Finland that has been reported so far

child with roberts syndrome

Roberts syndrome Is a genetically determined rare birth defect causing, skeletal deformities, particularly symmetrical limb reduction and craniofacial anomalies. For any child with limb and craniofacial bony malformations, this syndrome should be considered in the differentials. Although this syndrome represents only a small proportion of the total number of individuals with limb deficiency, it is important to be identified in order to give accurate genetic counselling including recurrence risk in siblings and possible prenatal diagnosis. This is the case report of a 22 days old male infant who presented with defective development of all four extremities and craniofacial abnormalities. The overall clinical and radiological features were suggestive of Roberts syndrome

Role of genes in oro-dental diseases.

In oral cavity, the spectrum of diseases due to genetic alterations ranges from developmental disturbances of teeth to the pre-cancerous and cancerous lesions. Of late, significant progress has been made in the molecular analysis of tumors. With molecular genetic testing emerging as diagnostic, prognostic, and therapeutic approach, a review of genetic alterations ranging from the development of oro-facial structures to the tumors in the head and neck region are addressed in this article. The functional regulatory aspect of genes in relation to oro-facial structures are discussed separately, i.e., in relation to tooth genesis, tooth agenesis (non-syndromic, syndromic), tooth structural alterations, syndromic oro-facial defects, bone diseases, skin diseases (genodermatoses), and malignant tumors. In this literature, various genes involved in the development of the oro-facial structures and tooth in particular are discussed. The genetic basis of disorders in the tooth development (agenesis, hypodontia), tooth structural defects like amelogenesis imperfecta (AI), dentinogenesis imperfecta (DI), and oro-facial structural alterations (various syndromes) are explained.

Partial Tetrasomy of Chromosome 22q11.1 Resulting from a Supernumerary Isodicentric Marker Chromosome in a Boy with Cat-eye Syndrome

The 22q11 region has been implicated in chromosomal rearrangements that result in altered gene dosage, leading to three different congenital malformation syndromes: DiGeorge syndrome, cat-eye syndrome (CES), and der(22) syndrome. Although DiGeorge syndrome is a common genomic disorder on 22q11, CES is quite rare, and there has been no report of Korean CES cases with molecular cytogenetic confirmation. In this study, we present the phenotypic and genetic characteristics of a 3-month-old boy with CES. Clinical findings included micropthalmia, multiple colobomata, and renal and genital anomalies. Cytogenetic analyses showed the presence of a supernumerary marker chromosome, which was identified as a bisatellited and isodicentric chromosome derived from an acrocentric chromosome. The results of array comparative genomic hybridization and fluorescence in situ hybridization studies confirmed the karyotype as 47,XY,+mar.ish idic(22)(q11.1) (D22S43+).arr 22q11.1(15,500,000-15,900,000)x4, resulting in a partial tetrasomy of 22q11.1. To the best of our knowledge, this is the first report in Korea of CES confirmed by cytogenetic and molecular cytogenetic analyses.

Seckel syndrome with chromosomal 18 deletion.

Four case records of patients with Seckel Syndrome (SS) were retrieved. Typical of bird headed dwarfism was seen in all. Chromosome 18 deletion was seen in one child with SS. MRI abnormalities were detected in 3 patients. Cytogenetic studies and neuroimaging is likely to provide important diagnostic and prognostic information.

Displasia cleidocraniana: relato de doze pacientes / Cleidocranial dysplasia: report of twelve patients

Objetivo: Analisar os achados clínicos e radiológicos da displasia cleidocraniana. Método: A Unidade de Genética do ICr-HCFMUSP, em conjunto com o setor da Radiologia, estudou 12 pacientes pertencentes a 8 famílias com displasia cleidocraniana...

Objectives: To analyse the clinical and radiological finding of cleidocranial dysplasia. Methods: The Genetics Unit of ICr-HCFMUSP, along with the Radiology department, performed the study of 12 patients from eight families of cleidocranial dysplasia...

Características cranianas, faciais e dentárias em indivíduos acondroplásicos / Craniofacial and dental features in achondroplastic individuals

A acondroplasia é a forma mais comum de nanismo por encurtamento dos membros. É uma síndrome hereditária de caráter autossômico dominante, que também pode ser causada por novas mutações genéticas. A formação óssea endocondral é defeituosa e leva a alterações craniofaciais e dentárias típicas. Os pacientes acometidos apresentam macroencefalia, calota craniana volumosa, base do crânio encurtada, nariz em sela e estreitamento de vias aéreas, além de retrognatia maxilar, discrepância entre arcos dentários e maloclusões acentuadas. O presente artigo tem como objetivo apresentar as características craniofaciais e dentárias de pacientes acondroplásicos, por meio de revisão de literatura.

Achondroplasia is the most common hereditary form of dwarfism. The syndrome is inherited in an autosomal dominant manner but it can also be a result of a new gene mutation. The defective endochondral bone formation causes typical craniofacial and dental features such as enlarged calvarium, short posterior cranial base, depressed nasal bridge, short upper airway, retrognathic maxilla and malocclusion. The aim of the present article is to introduce the craniofacial and dental features of achondroplastic patients, by reviewing the literature.

Supernumerary nostril: a case report and review / Fosa nasal supernumeraria: reporte de un caso y revisión

Supernumerary nostril is a very rare congenital anomaly, which includes additional nostril with or without accessory cartilage. In the present case of the left supernumerary nostril, a small cavity of around 3 mm diameter and accessory lower lateral cartilage were present. The cavity was lined with mucous membrane and filled with mucoid discharge .Nasal endoscopy of accessory nasal cavity revealed that it was small as compared to normal nasal cavity and did not communicate with the ipsilateral nasal cavity. The diameter of the normal anterior nasal opening was less on left side as compared to right side. Unilateral supernumerary nostril may occur because of the Assuring of the lateral nasal process during fetal growth.

Fosa nasal supernumeraria es una anomalía congénita muy poco frecuente, que incluye una nueva fosa nasal con o sin cartílago accesorio. En el presente caso de fosa nasal supernumeraria izquierda estaban presentes, una pequeña cavidad de unos 3 mm de diámetro y cartílago lateral accesorio inferior. La cavidad estaba revestida con membranas mucosas y llena con descarga mucoide. La endoscopía nasal de la cavidad nasal accesoria reveló que ésta era pequeña en comparación con la cavidad nasal normal y que no se comunicaba con la cavidad nasal ipsilateral. El diámetro normal de la apertura nasal anterior fue menor en el lado izquierdo en comparación con el lado derecho. La fosa nasal unilateral supernumeraria puede ocurrir a causa de las fisuras del proceso lateral nasal durante el crecimiento fetal.