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Dermatology (Basel, Switzerland) 2018Keloids are benign fibroproliferative tumors that extend beyond the original wound. Spontaneous keloids are those that result without a significant history of trauma.... (Review)
Review
BACKGROUND
Keloids are benign fibroproliferative tumors that extend beyond the original wound. Spontaneous keloids are those that result without a significant history of trauma. There are multiple reported cases in the literature.
OBJECTIVE
This article provides a summary and review of the cases that have been reported with spontaneous keloids and organizes them according to their associated medical conditions.
METHODS
A literature review was conducted using PubMed and MEDLINE that included all English published cases and case series from May 1955 to February 2018.
RESULTS
Spontaneous keloids have been reported mainly in association with syndromes such as Rubinstein-Taybi syndrome, Dubowitz syndrome, Noonan syndrome, Goeminne syndrome, Bethlem myopathy, conjunctivocorneal dystrophy, X-linked recessive polyfibromatosis and a novel X-linked syndrome with flamin A mutation. Furthermore, spontaneous keloids were reported in atopic patients and a couple of patients who are medically healthy.
CONCLUSION
Spontaneous keloids are diagnosed clinically based on the patient's history, and it is challenging to confirm since they might be triggered by minimal injury or inflammation especially if it is a single lesion. Reported syndromes indicate a genetic possibility in the pathogenesis of spontaneous keloids.
Topics: Humans; Keloid
PubMed: 30114700
DOI: 10.1159/000491924 -
Cureus Aug 2023Pyoderma gangrenosum (PG) is a challenging cutaneous manifestation associated with Dubowitz syndrome, a rare genetic disorder characterized by multiple congenital... (Review)
Review
Pyoderma gangrenosum (PG) is a challenging cutaneous manifestation associated with Dubowitz syndrome, a rare genetic disorder characterized by multiple congenital anomalies, developmental delay, and distinctive facial features. This review article aims to provide a comprehensive overview of the association between Dubowitz syndrome and pyoderma gangrenosum, emphasizing the clinical presentation, challenges in diagnosis and management, and potential underlying mechanisms. A comprehensive literature search was conducted to gather relevant studies, and inclusion and exclusion criteria were applied to select appropriate articles. The association between Dubowitz syndrome and pyoderma gangrenosum has been documented in reported cases and studies. Clinical characteristics of Pyoderma gangrenosum in Dubowitz syndrome include painful necrotic ulcers with undermined borders. Diagnosing pyoderma gangrenosum in the context of Dubowitz syndrome can be challenging due to the overlapping clinical features and complexities associated with the syndrome. Managing pyoderma gangrenosum involves a multidisciplinary approach, with general principles of wound care, systemic therapy, and pain management. Specific considerations for treating pyoderma gangrenosum in Dubowitz syndrome include collaboration among specialists and careful monitoring. Future directions for management include further research to understand the underlying mechanisms and develop targeted therapies. Recognizing and addressing pyoderma gangrenosum in Dubowitz syndrome is crucial for optimal patient care. This review enhances awareness among healthcare professionals and provides insights for improving diagnosis, management, and treatment outcomes for individuals with this challenging combination of conditions.
PubMed: 37706150
DOI: 10.7759/cureus.43408 -
American Journal of Medical Genetics.... Jan 2021Dubowitz syndrome (DubS) is considered a recognizable syndrome characterized by a distinctive facial appearance and deficits in growth and development. There have been...
Dubowitz syndrome (DubS) is considered a recognizable syndrome characterized by a distinctive facial appearance and deficits in growth and development. There have been over 200 individuals reported with Dubowitz or a "Dubowitz-like" condition, although no single gene has been implicated as responsible for its cause. We have performed exome (ES) or genome sequencing (GS) for 31 individuals clinically diagnosed with DubS. After genome-wide sequencing, rare variant filtering and computational and Mendelian genomic analyses, a presumptive molecular diagnosis was made in 13/27 (48%) families. The molecular diagnoses included biallelic variants in SKIV2L, SLC35C1, BRCA1, NSUN2; de novo variants in ARID1B, ARID1A, CREBBP, POGZ, TAF1, HDAC8, and copy-number variation at1p36.11(ARID1A), 8q22.2(VPS13B), Xp22, and Xq13(HDAC8). Variants of unknown significance in known disease genes, and also in genes of uncertain significance, were observed in 7/27 (26%) additional families. Only one gene, HDAC8, could explain the phenotype in more than one family (N = 2). All but two of the genomic diagnoses were for genes discovered, or for conditions recognized, since the introduction of next-generation sequencing. Overall, the DubS-like clinical phenotype is associated with extensive locus heterogeneity and the molecular diagnoses made are for emerging clinical conditions sharing characteristic features that overlap the DubS phenotype.
Topics: Adolescent; Child; Child, Preschool; DNA Copy Number Variations; Eczema; Exome; Facies; Female; Genetic Predisposition to Disease; Genome, Human; Genomics; Growth Disorders; Histone Deacetylases; Humans; Infant; Intellectual Disability; Male; Microcephaly; Phenotype; Repressor Proteins; Exome Sequencing
PubMed: 33098347
DOI: 10.1002/ajmg.a.61926 -
Cureus Nov 2023Dubowitz syndrome (DS) is a rare genetic disorder characterized by multiple morphological abnormalities, short stature, and different degrees of mental disability....
Dubowitz syndrome (DS) is a rare genetic disorder characterized by multiple morphological abnormalities, short stature, and different degrees of mental disability. Endocrinological evaluation should be done for these subjects, as they can suffer from multiple hormonal derangements. We present a case of a 12-year-old Lebanese girl, diagnosed with Dubowitz syndrome, who presented to our clinic for short stature. She had received growth hormones (GHs) and improved her height. More investigations showed the presence of Hashimoto thyroiditis with normal thyroid stimulating hormone, so hormonal follow-up was recommended. The association between Dubowitz syndrome and Hashimoto thyroiditis has not been described so far. Thus, in the setting of this syndrome, it is worthwhile to check for growth hormone deficiency and Hashimoto's thyroiditis.
PubMed: 38074036
DOI: 10.7759/cureus.48440 -
Cureus Jul 2021Dubowitz syndrome is a relatively rare genetic and developmental disorder. An eight-year-old female presented with a complaint of drooping in her left eye since...
Dubowitz syndrome is a relatively rare genetic and developmental disorder. An eight-year-old female presented with a complaint of drooping in her left eye since birth. She had undergone ptosis surgery two years back. There was a history of delayed speech and delayed dentition. She was of moderate built appropriate to her age. There was microcephaly, sparse hair, flat bridge of the nose with a prominent rounded tip, short stature, low-set ears, and micrognathia with subsequent protrusion of upper two incisors. Based on the clinical features a diagnosis of Dubowitz syndrome with left recurrent ptosis was made. She underwent frontalis sling surgery and had a satisfactory outcome.
PubMed: 34422468
DOI: 10.7759/cureus.16436 -
Wounds : a Compendium of Clinical... Mar 2023Dubowitz syndrome is a rare genetic disease with only a few cases reported in the literature. It is characterized by growth retardation, microcephaly, facial dysmorphism...
INTRODUCTION
Dubowitz syndrome is a rare genetic disease with only a few cases reported in the literature. It is characterized by growth retardation, microcephaly, facial dysmorphism and higher risk of developing cancer and cardiomyopathies. PG is an autoinflammatory disorder that causes painful ulcers to develop on the skin and has not been previously associated with Dubowitz syndrome.
CASE PRESENTATION
The authors report the case of a 50-year-old female with Dubowitz syndrome who developed painful ulcerative lesions. An incisional biopsy was performed to rule out other diagnoses, and a subsequent clinical diagnosis of PG was made. The patient was treated with specialized wound dressings and oral glucocorticoids. The clinical picture improved consistently after 7 weeks of therapy.
CONCLUSIONS
This case report, to the authors' knowledge, is the first to suggest a possible association between Dubowitz syndrome and PG and also to indicate an effective treatment.
Topics: Female; Humans; Middle Aged; Comorbidity; Growth Disorders; Microcephaly; Pyoderma Gangrenosum; Facies; Intellectual Disability; Ulcer; Glucocorticoids
PubMed: 37023352
DOI: 10.25270/wnds/22051 -
Molecular Genetics & Genomic Medicine May 2021Dubowitz syndrome (DS) is a complex and rare condition characterized by postnatal growth retardation, microcephaly, short stature, mild developmental delay, facial...
BACKGROUND
Dubowitz syndrome (DS) is a complex and rare condition characterized by postnatal growth retardation, microcephaly, short stature, mild developmental delay, facial dysmorphism, skin eruption and bone marrow failure. Though approximately 200 cases have been described so far, no specific genetic analysis, laboratory tests or radiological exams are available to confirm the diagnosis which is still based on clinical and facial features. Although short stature is a major feature of the syndrome, no endocrine alterations have been reported so far and scant data are available about the efficacy and safety of GH treatment in these patients.
METHODS
A 13-year-old male patient was referred to our attention for short stature. Endocrinological evaluation including GH axis, adrenal and gonadal functions were assessed. aCGH was performed.
RESULTS
14q terminal microdeletion associated with Dubowitz phenotype was found. Endocrinological investigations revealed the presence of hypopituitarism which showed a satisfactory response to short-term growth hormone therapy. The subject also started glucocorticoid replacement therapy. Disorders in pubertal progression and gonadal function were noted.
CONCLUSIONS
Dubowitz syndrome (DS) includes different clinical findings variably occurring. Subjects with a Dubowitz phenotype should be carefully monitored for endocrinological anomalies. The prompt recognition of potential life-threatening endocrinological condition for example adrenal insufficiency is mandatory in order to start an adequate and early treatment.
Topics: Chromosome Deletion; Chromosomes, Human, Pair 14; Eczema; Facies; Growth Disorders; Growth Hormone; Hormone Replacement Therapy; Humans; Intellectual Disability; Male; Microcephaly; Phenotype; Young Adult
PubMed: 33788412
DOI: 10.1002/mgg3.1644 -
Journal of Cerebrovascular and... Mar 2020Cerebral cavernous malformations (CCMs) are proliferative sinusoidal vascular lesions and are the most common vascular malformations of the brain. They can occur...
Cerebral cavernous malformations (CCMs) are proliferative sinusoidal vascular lesions and are the most common vascular malformations of the brain. They can occur sporadically or secondary to an underlying genetic predisposition where multiple lesions are commonly seen. Dubowitz syndrome is a clinically-diagnosed rare genetic disorder with an unknown molecular basis. An association between these conditions has not been reported previously. A 30-year-old woman with a Dubowitz-like syndrome presented with acute left leg weakness, gait ataxia and transient loss of consciousness. Imaging revealed five CCMs with recent hemorrhage in relation to one lesion in the left middle cerebellar peduncle. A recurrent hemorrhage from the same lesion occurred ten weeks later and she underwent microsurgical excision of this malformation. Genetic analysis revealed an unbalanced chromosomal rearrangement involving partial deletion of chromosome 7q21, the locus of the CCM1/KRIT1 gene known to be associated with familial CCMs. This is the first description of CCMs in association with the Dubowitz phenotype. The genetic basis of Dubowitz syndrome may be heterogeneous but, for the first time, overlap is demonstrated between this condition and multiple CCMs, with a possible common genetic etiology. Knowledge of this association may be of help in the management of acute neurological presentations in Dubowitz-like syndromes. Keywords: Hemangioma, Cavernous, Central nervous system, Dubowitz syndrome, Genetics.
PubMed: 32596139
DOI: 10.7461/jcen.2020.22.1.15 -
Case Reports in Dentistry 2022Oligodontia is a dental abnormality in which the patient is missing teeth. It is a hereditary disorder characterized by agenesis of more than six primary or permanent...
INTRODUCTION
Oligodontia is a dental abnormality in which the patient is missing teeth. It is a hereditary disorder characterized by agenesis of more than six primary or permanent teeth, excluding the wisdom teeth. Oligodontia is often related with an abnormal size of teeth, conical shape, taurodontism, frequent enamel abnormalities, and delayed eruption. Oligodontia may be clinically isolated or associated with ectodermal dysplasia, a large group of rare diseases, and other syndromes. Dental characteristics of a six-and-a-half-year-old Moroccan boy with oligodontia and in apparent good health were described. Three syndromes associated with oligodontia have been discussed. Above all, based on the facial phenotype, Dubowitz syndrome has been retained as the most likely diagnostic hypothesis. This case could be the first reported case described in Morocco, but a thorough examination with genetic analysis must be carried out.
CONCLUSION
Oligodontia could clinically be isolated or associated with ectodermal dysplasia, a large group of rare diseases, and other syndromes.
PubMed: 36601644
DOI: 10.1155/2022/1045327 -
Nucleic Acids Research Sep 2019Expression of human mitochondrial DNA is indispensable for proper function of the oxidative phosphorylation machinery. The mitochondrial genome encodes 22 tRNAs, 2 rRNAs...
Expression of human mitochondrial DNA is indispensable for proper function of the oxidative phosphorylation machinery. The mitochondrial genome encodes 22 tRNAs, 2 rRNAs and 11 mRNAs and their post-transcriptional modification constitutes one of the key regulatory steps during mitochondrial gene expression. Cytosine-5 methylation (m5C) has been detected in mitochondrial transcriptome, however its biogenesis has not been investigated in details. Mammalian NOP2/Sun RNA Methyltransferase Family Member 2 (NSUN2) has been characterized as an RNA methyltransferase introducing m5C in nuclear-encoded tRNAs, mRNAs and microRNAs and associated with cell proliferation and differentiation, with pathogenic variants in NSUN2 being linked to neurodevelopmental disorders. Here we employ spatially restricted proximity labelling and immunodetection to demonstrate that NSUN2 is imported into the matrix of mammalian mitochondria. Using three genetic models for NSUN2 inactivation-knockout mice, patient-derived fibroblasts and CRISPR/Cas9 knockout in human cells-we show that NSUN2 is necessary for the generation of m5C at positions 48, 49 and 50 of several mammalian mitochondrial tRNAs. Finally, we show that inactivation of NSUN2 does not have a profound effect on mitochondrial tRNA stability and oxidative phosphorylation in differentiated cells. We discuss the importance of the newly discovered function of NSUN2 in the context of human disease.
Topics: 5-Methylcytosine; Animals; CRISPR-Cas Systems; Eczema; Facies; Fibroblasts; Gene Editing; Gene Knockout Techniques; Growth Disorders; HEK293 Cells; Humans; Intellectual Disability; Methylation; Methyltransferases; Mice; Mice, Knockout; Microcephaly; Mitochondria; Nucleic Acid Conformation; Oxidative Phosphorylation; Primary Cell Culture; Protein Transport; RNA Processing, Post-Transcriptional; RNA, Messenger; RNA, Mitochondrial; RNA, Transfer
PubMed: 31276587
DOI: 10.1093/nar/gkz559