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At least 577 records · Page 32Linked to original sources
PubMed1991

The cardio-facio-cutaneous (CFC) syndrome and Noonan syndrome: are they the same?

The distinction between the cardio-facio-cutaneous syndrome (CFC) and the Noonan syndrome (NS) has been based on the presence of a characteristic facies, abnormal hair and skin, and sporadic occurrence. However, all reports of the CFC syndrome comment on the similarity between it and NS, and its sporadic nature is now debatable. This report demonstrates the evolution of the clinical phenotype in a patient with the CFC syndrome and prompts us to question the validity of separating CFC from NS.

Diagnosis, Differential↗
PubMed1991

Holoprosencephaly as a possible embryonic alcohol effect.

Three mothers of infants with holoprosencephaly consumed alcohol heavily in pregnancy. We postulate that early alcohol exposure is a possible cause of their malformation. The 3 mothers consumed alcohol only in the first trimester but the first mother continued to take chlordiazepoxide and imipramine throughout the pregnancy. Her infant had an alobar holoprosencephaly associated with a median cleft lip, ocular hypotelorism, and a flat nose. The other infants had semilobar holoprosencephaly and hydrocephalus. These latter 2 infants did not show the characteristic facies of the fetal alcohol syndrome. G-band chromosome studies were normal in all 3 infants. The association of holoprosencephaly with alcohol exposure during pregnancy in humans has been mentioned only briefly, although this malformation has been induced by alcohol in animals. These 3 infants may support the hypothesis that acute or subacute heavy alcohol exposure early in pregnancy could lead to holoprosencephaly without the necessity of a chronic alcohol exposure and without necessarily causing the typical facial findings of the fetal alcohol syndrome.

Abnormalities, Drug-Induced↗
PubMed1993

Pallister-Killian and Fryns syndromes: nosology.

Fryns syndrome is a lethal autosomal recessive multiple congenital anomaly syndrome characteristic "coarse" facies, cleft palate, diaphragmatic hernia, and distal digital hypoplasia. The appearance of the face and digits is very similar to that observed in Pallister-Killian syndrome (mosaic isochromosome 12p), although the incidence of cleft palate, diaphragmatic hernia, and neonatal death is much lower in the latter condition. We report on an infant with many manifestations of Fryns syndrome ("coarse" face, cleft palate, cloudy corneae, diaphragmatic hernia, distal digital hypoplasia, and neonatal death) who was found to be mosaic for i(12p). Her diagnosis was changed to Pallister-Killian syndrome and the family was counselled accordingly. The clinical overlap between Fryns and Pallister-Killian syndromes is discussed. Because the chromosome abnormality in Pallister-Killian syndrome is often limited to fibroblasts and may be selectively eliminated both in vivo and in vitro, some Pallister-Killian patients may be misdiagnosed with Fryns syndrome and given an erroneously high recurrence risk. Newborn infants with the Fryns or Pallister-Killian phenotypes should have chromosome studies involving multiple tissues so that the correct diagnosis can be made. This will contribute to the understanding of both disorders and facilitate appropriate genetic counselling.

Abnormalities, Multiple↗
PubMed1994

Barth syndrome: clinical observations and genetic linkage studies.

Barth syndrome is an X-linked recessive condition characterized by skeletal myopathy, cardiomyopathy, proportionate short stature, and recurrent neutropenia, but with normal cognitive function. Some, but not all patients, exhibit carnitine deficiency and/or the presence of 3-methylglutaconic and ethylhydracylic acids in urine. Recently the mutation causing Barth syndrome was localised to the Xq28 region by linkage analysis. We report 6 cases of Barth syndrome from 4 families and highlight the fact that neuromuscular and cardiovascular symptoms and the severity of infections tend to improve with age, while short stature persists. Also previously unreported was myopathic facies and nasal quality to speech in our cases. The urinary organic acid abnormalities and plasma carnitine deficiency were inconsistent findings. We propose that they may be epiphenomena rather than indicators of the primary metabolic defect, and that the primary defect or defects in this disorder may lie in the mitochondrial electron transport chain.

Abnormalities, Multiple↗
PubMed1995

Femoral-facial syndrome--prenatal diagnosis--autosomal dominant inheritance.

Fetal micrognathia and short, bowed femora were found on a routine prenatal ultrasonogram. At birth, a cleft palate and the characteristic facial appearance confirmed the diagnosis of the femoral-facial syndrome. (The femoral-facial syndrome [McKusick 137840] was first delineated by Daentl et al. [1975: J Pediatr 86:197-211] and called the "femoral hypoplasia-unusual facies syndrome." We prefer the "femoral-facial syndrome" because it is shorter, more easily translated, and because the McKusick catalog is the most widely recognized standard of nomenclature.) A paternal great uncle, deceased at age 4 years, seems to have had the same condition.

Female↗
PubMed1995

Fryns syndrome survivors and neurologic outcome.

Fryns syndrome is an autosomal recessive multiple congenital anomaly syndrome characterized by diaphragmatic hernia, unusual facies, and distal limb hypoplasia. It was first reported as a lethal condition. We report on a three-year-old survivor with Fryns syndrome, and provide a review on the outcome of other survivors. Patients who survive the neonatal period represent 14% of reported cases. Characteristics of survivors include less frequent diaphragmatic hernia and milder lung hypoplasia, absence of complex cardiac malformation, and neurologic impairment. Multiple central nervous system abnormalities have been reported in Fryns syndrome, including agenesis of the corpus callosum, Dandy-Walker abnormality, cerebellar heterotopias, cerebellar hypoplasia, enlarged ventricles, and hypoplasia of the olfactory bulbs. Our patient exhibited profound mental retardation. He had malformations of gyration and sulcation, particularly around the central sulcus, and hypoplastic optic tracts beyond the optic chiasm. Understanding of long-term outcome of survivors is important for counseling of families with Fryns syndrome. Careful brain examination is advised; however, a normal radiological brain examination does not preclude developmental delay. The spectrum of individual outcome and of associated anomalies indicates that individual evaluation, including imaging for structural brain malformation, is strongly advised.

Abnormalities, Multiple↗
PubMed2003

Prenatal diagnosis of isolated femoral bent bone skeletal dysplasia: problems in differential diagnosis and genetic counseling.

Severe localized and symmetric bowing of the femora, in the absence of other significant skeletal or nonskeletal abnormalities, is a rare prenatal ultrasound finding. A 38-year-old woman was referred at 19 weeks gestation and ultrasound of the fetus showed severe shortening, and marked symmetric bowing of the femora. A provisional diagnosis of kyphomelic dysplasia (KD) was made. The patient elected termination of pregnancy and post mortem assessments were most consistent with kyphomelic dysplasia. KD is bent-bone skeletal dysplasia that, in contrast to campomelic dysplasia, involves principally the femora with relative sparing of the remainder of the skeleton. KD can be difficult to distinguish, particularly from symmetric cases of femoral hypoplasia unusual facies syndrome (FH-UFS), and few prenatal diagnoses have been reported. Because KD is thought to an be autosomal recessive disorder, the possibility that definitive diagnosis may not be possible prenatally, and even by postmortem assessment in cases choosing to abort, is an important counseling consideration.

Adult↗
PubMed2003

X chromosome inactivation patterns in Russell-Silver syndrome patients and their mothers.

Russell-Silver syndrome (RSS) is a disorder characterized by pre- and post-natal growth deficiency, triangular facies, relative macrocephaly, and body asymmetry. Maternal uniparental disomy for chromosome 7 has been found in approximately 10% of RSS cases, while the cause in the remaining cases is unknown. Although most cases of RSS are sporadic, at least 25 families have been reported with familial RSS and inheritance patterns of RSS consistent with an X-linked dominant mutation. Thus, we hypothesized that skewed X-chromosome inactivation (XCI) could be increased in some females with RSS as a consequence of a tendency to have the mutant allele on the predominantly active chromosome. Alternatively, unaffected mothers of children with RSS may tend to be skewed due to preferential inactivation of the mutant allele. In support of this last hypothesis, a significant increase in extremely skewed XCI (>95%) was found in mothers of children with RSS (4 of 21, 19%) compared to controls (2 of 101, 2%) (P = 0.008). However, an increase in skewed XCI was also observed in female patients who had unexplained short stature but did not fulfill the criteria for RSS (3 of 17, 18%) (P = 0.02), but not in those diagnosed as RSS (0 of 7, n.s.). Different mechanisms may underlie the increase in skewing in each group, possibly being due to different X-linked mutations or growth restriction during very early in utero development.

Abnormalities, Multiple↗
PubMed2004

Early diagnosis of Wolf-Hirschhorn syndrome triggered by a life-threatening event: congenital diaphragmatic hernia.

Wolf-Hirschhorn syndrome (WHS, OMIM 194190) is a chromosomal disorder characterized by retarded mental and physical growth, microcephaly, Greek helmet appearance of the facies, seizures/epilepsy. Closure defects of lip or palate, and cardiac septum defects occur in 30-50% of cases. Its cause is a deletion in the short arm of chromosome 4. We present a male patient, born after 37 weeks gestation, as the fourth pregnancy of non-consanguineous healthy parents, with unilateral cleft lip and palate, hypertelorism, a right-sided ear tag, and mild epispadias. At age 10 weeks he developed acute respiratory distress and acute bowel obstruction requiring emergency laparotomy. This revealed a left-sided posterolateral diaphragmatic defect, type Bochdalek, with incarceration of the small intestines necessitating major bowel resection. Clinical genetic investigation suggested a chromosome anomaly, but regular karyotyping was normal. However, FISH analysis showed a microdeletion in the short arm of chromosome 4 (4p-), consistent with WHS. A combination of this syndrome with congenital diaphragmatic hernia (CDH) has been rarely described. CDH can present either as an isolated defect at birth, or with multiple congenital abnormalities, or as part of a defined syndrome or chromosomal disorder. Therefore CDH, although not common in WHS, can lead to its diagnosis relatively early in life. We strongly recommend a clinical genetic evaluation of each CDH patient with facial anomalies taking into consideration 4p- deletion syndrome.

Abnormalities, Multiple↗
PubMed2004

Clinical variability in a Noonan syndrome family with a new PTPN11 gene mutation.

Noonan syndrome (NS) is an autosomal dominant disorder comprising short stature, facial dysmorphism, short and/or webbed neck, heart defects, and cryptorchidism in males. The gene responsible for the disorder (PTPN11) was recently identified, and explains 30-50% of the cases clinically diagnosed as NS. Cardiofaciocutaneous (CFC) syndrome, a similar but distinct entity, is characterized by relative macrocephaly, characteristic facial appearance, ectodermal abnormalities (sparse and friable hair, sparse eyebrows, hyperkeratotic skin), congenital heart defects, and growth and mental retardation. We describe on a young woman who presents clinical features of NS (short stature, triangular facies, with downslanting palpebral fissures and apparent hypertelorism, webbed neck, pulmonary stenosis, bleeding diathesis, prominent corneal nerves), but with a more prominent ectodermal involvement (sparse and very coarse hair, sparse eyebrows and eyelashes) and developmental delay/mental retardation, which are characteristic of CFC patients. Sequencing of the PTPN11 gene showed a T411M substitution, not previously described in patients with NS. The same mutation was found in her mother and older sister, not initially considered to be affected by NS, but with very subtle clinical findings compatible with this diagnosis. Molecular dynamic studies indicate that this new mutation, similar to other previously described mutations, favors a more active protein conformation. However, the main disruptive effect is not directly in the catalytic domain, suggesting that the location of this mutation could make the protein more susceptible to gene-gene or gene-environment interactions. Atypical cases of NS should be screened for mutations in the PTPN11 gene and in the case of a positive result, first-degree relatives should also be tested for the specific mutation.

Abnormalities, Multiple↗
PubMed2005

A novel syndrome resembling Desbuquois dysplasia.

We report on three Tunisian siblings with a rare assortment of clinical and radiographic abnormalities closely resembling Desbuquois dysplasia. However, the siblings have had normal facies, normal hands, and were mentally normal. There were severe musculo-skeletal distinguishing features such as joint stiffness, severe kyphoscoliosis, and multiple large joint dislocations. Moreover, the patients had an additional remarkable radiographic feature not reported in Desbequois dysplasia-multiple carpal ossification centers. The diagnosis of Desbuquois dysplasia is more difficult in older children and adults as the characteristic facial features of early childhood may recede, and the metaphyseal growth plates obliterate. This condition of these patients represents a novel Desbuquois-like syndrome.

Abnormalities, Multiple↗
PubMed2005

A woman with 46,XX,dup(16)(p13.11 p13.3) and the ATR-X phenotype.

We report a Japanese woman with 46,XX,dup(16)(p13.11p13.3), who closely resembled the phenotype of X-linked alpha-thalassemia/mental retardation syndrome (ATR-X, MIM # 301040). Although she never had alpha-thalassemia, she showed characteristic clinical features including severe mental retardation, characteristic facies and behavior. ATR-X is caused by mutations of the ATRX gene. Although the function of ATRX protein has remained unclarified, it is thought to be involved in the regulation of several genes. The only target gene identified so far is the alpha-globin gene at 16p13.3. Clinical similarity among patients with ATR-X and dup(16)(p13.11p13) may indicate that some target genes regulated by ATRX reside in the duplicated region between 16p13.11 and 16p13.3, and that these genes are abnormally upregulated in ATR-X differently from the alpha-globin gene.

Adult↗
PubMed2005

Marinesco-Sjögren syndrome in a male with mild dysmorphism.

Marinesco-Sjogren syndrome (MSS) is a rare, autosomal recessive disorder comprising cataracts, cerebellar ataxia caused by cerebellar hypoplasia, mild to moderate mental retardation, neuromuscular weakness, short stature, hypergonadotrophic hypogonadism, and skeletal anomalies. The syndrome was recently mapped to chromosome 5q31, but there is evidence for genetic heterogeneity, and no gene has been identified. We report a 5-year-old male with cataracts, ataxia, a progressive cerebellar atrophy, developmental delay, seizures, hypotonia, and a sensorimotor neuropathy consistent with many cases of MSS. He also had mild craniofacial dysmorphism consisting of hypertrichosis and synophrys, deep-set eyes with epicanthic folds, a flat philtrum, a high palate, short thumbs, and a wide sandal gap between the first and second toes. Skeletal findings included an increased kyphosis. We reviewed the literature on MSS to determine if craniofacial dysmorphism and the presence of neuropathy and/or myopathy would prove to be diagnostically useful in this phenotypically heterogeneous condition. The majority of cases of MSS do not have craniofacial dysmorphism, but other cases have been reported with features such as ptosis or a myopathic facies that are likely to reflect the underlying myopathic or neuromuscular processes in MSS.

Abnormalities, Multiple↗
PubMed2005

Marshall-Smith syndrome: natural history and evidence of an osteochondrodysplasia with connective tissue abnormalities.

The Marshall-Smith syndrome (MSS) is a distinct malformation syndrome characterized by accelerated skeletal maturation, relative failure to thrive, respiratory difficulties, mental retardation, and unusual facies, including prominent forehead, shallow orbits, blue sclerae, depressed nasal bridge, and micrognathia. At least 33 cases have been reported in the literature, mostly as single case reports or small series. The purpose of the present study is to report on the clinical findings and natural history of MSS in five children and to review the features of three others previously reported, with particular attention to the skeletal and connective tissue findings. Our study demonstrates an increased rate of nontraumatic fractures and other bony and connective tissue abnormalities that support the hypothesis that MSS should be considered an osteochondrodysplasia. In addition, long-term survival beyond infancy is possible if respiratory problems are expectantly and aggressively managed.

Abnormalities, Multiple↗
PubMed2005

Congenital anomaly of cervical vertebrae is a major complication of Rubinstein-Taybi syndrome.

Rubinstein-Taybi syndrome (RTS; MIM# 180849) is a well-known malformation syndrome, characterized by broad thumbs and halluces, a characteristic facies, short stature, and mental retardation. RTS is accompanied by a variety of morbid complications, particularly of the skeleton. Based on the experience of five RTS patients with malformation of the craniovertebral junction, we draw attention to previously unrecognized life-threatening complications of RTS, including instability of C1-C2, os odontoideum, hypoplasia of the dens, and fusion of the cervical vertebrae. One patient developed severe cervical myelopathy. Malformation of the cervical spine may be a common syndromic constituent of RTS, to which special attention should be paid to prevent its neurologic sequelae.

Adolescent↗
PubMed2005

Floating-Harbor syndrome complicated by tethered cord: a new association and potential contribution from growth hormone therapy.

Floating-Harbor syndrome is a rare syndrome with short stature, severely delayed bone age, typical facies and delay in expressive speech. Structural malformations are uncommon, and tethered cord or other forms of spinal dysraphism have not previously been reported. We report on a case of Floating-Harbor syndrome, complicated by tethered cord and discuss the possibility that growth hormone therapy may contribute to the development of symptoms of this malformation.

Abnormalities, Multiple↗
PubMed2005

Detection of an unexpected subtelomeric 15q26.2 --> qter deletion in a little girl: clinical and cytogenetic studies.

Unlike the small proximal 15q deletions causing Prader-Willi and/or Angelman syndrome, distal deletions of the terminal long arm of chromosome 15 have rarely been described. To the best of our knowledge, only four patients with a pure terminal 15q deletion have been documented in the literature. We report here on an unexpected abnormal hybridization pattern for the 15q specific subtelomeric control probe (clone 154P1) of the commercial SNRPN probe in a girl referred for suspicion of Angelman syndrome. Investigation by fluorescent in situ hybridization (FISH) using bacterial artificial chromosome (BAC) clones defined a partial monosomy 15q26.2 --> 15qter for a minimal critical region of approximately 5.7 Mb, which is the most distal de novo 15qter deletion reported to date. All the de novo 15qter deletion cases, including ours, presented with pre- and post-natal growth retardation related to the loss of one copy of the IGF1R gene. Based on the comparaison with the previous published cases and owing to the clinical phenotype of our patient, we define a new subtelomeric 15qter syndrome which would be characterized by intrauterine growth retardation and global post-natal growth failure, variable mental retardation, facial anomalies including relative micrognathia and triangular facies and minor malformations of the extremities including proximally placed thumbs, cubitus valgus, and brachydactyly with tappering of the digits.

Abnormalities, Multiple↗
PubMed2005

Costello syndrome and hyperinsulinemic hypoglycemia.

Costello syndrome is characterized by mental retardation, loose skin, coarse facies, skeletal abnormalities, cardiovascular abnormalities (congenital heart defects, cardiomyopathy, rhythm disturbances), and predisposition to neoplasia. Endocrine abnormalities including growth hormone deficiency, adrenal insufficiency, glucose intolerance, parathyroid adenoma with hyperprolactinemia and hypoglycemia have been described. Hypoglycemia has been documented due to growth hormone and cortisol deficiency. We report on two patients with Costello syndrome and persistent hyperinsulinemic hypoglycemia and review the endocrine manifestations of Costello syndrome. Both patients required diazoxide therapy to stop the unregulated insulin secretion and maintain normoglycemia. The mechanism of persistent hyperinsulinism in patients with Costello syndrome is unclear.

Abnormalities, Multiple↗