Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0026827 (hypotonia)
 5,860 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Several "progeroid" syndromes have now been identified. The De Barsy syndrome is an autosomal recessive syndrome of dwarfism, mental deficiency, an "aged" appearance at birth, abnormal elastic fibers on skin biopsy, and lax skin, large helices, eye abnormalities, lax joints, hypotonia, and athetoid posturing. We report one case and review 11 cases from the literature. To understand the abnormal appearance of the elastic fibers on biopsy, we performed elastin gene expression studies on fibroblasts cultured from our patient's skin. Molecular hybridization studies revealed reduced elastin mRNA steady-state levels as compared with age matched control individuals. Assuming normal rates of mRNA translation, reduced elastin synthesis would occur. Diminished dermal elastin content could explain the altered cutaneous elasticity, decreased elastic fibers in the skin, and many clinical manifestations of individuals with this condition.
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PMID:De Barsy syndrome: report of a case, literature review, and elastin gene expression studies of the skin. 130 62

Most reported cases of Weaver syndrome are sporadic, and the mode of inheritance is still unclear. We describe two (male and female) sibs born to consanguineous Bedouin parents with manifestations resembling Weaver syndrome. Both sibs had accelerated growth of prenatal onset, hypotonia, psychomotor retardation, excess loose skin, peculiar craniofacial and acral anomalies, dental dysplasia and/or serrated gums, joint laxity, and hoarse low-pitched cry. One of them had an accelerated harmonic skeletal maturation. Differentiating features from Weaver syndrome are discussed, and autosomal recessive inheritance is suggested.
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PMID:A new autosomal recessive disorder resembling Weaver syndrome. 933 72

Congenital myopathies have been described in association with systemic and skin anomalies but not with cutis laxa. De Barsey syndrome relates cutis laxa with neurological alterations and muscular hypotonia, but electromyographic nor muscular pathological studies have been made in previously reported cases. We report a case associating two major features: cutis laxa and congenital myopathy, both confirmed by biopsy. We propose the diagnosis of De Barsey syndrome in an incomplete form.
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PMID:[Congenital myopathy associated with cutis laxa]. 263 48

We report two families with seven siblings with de Barsy syndrome. Characteristic features include severe mental retardation, hypermobility with athetoid movements, grimacing, muscular hypotonia, laxity of small joints and brisk deep tendon reflexes, progeroid aspect with cutis laxa, atrophy of skin with hyperpigmentation, isolated depigmentations, reduction of subcutaneous fatty tissue, translucent vein pattern, short stature, frontal bossing in the young child, large prominent ears with dysplastic helices and corneal clouding or cataracts. The syndrome probably has autosomal recessive inheritance.
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PMID:De Barsy syndrome--an autosomal recessive, progeroid syndrome. 407 51

We report two patients with Opitz trigonocephaly syndrome. Both children showed the pattern of abnormal findings characteristic of this syndrome, including trigonocephaly, upslanted palpebral fissures, inner epicanthic folds, broad alveolar ridges, small chin, short neck with loose skin, muscular hypotonia and cardiac defect. An 8-week-old girl had multiple gingival frenula, brachydactyly, syndactyly of toes and anal stenosis in addition, while a boy who died at 28 h from cardiac failure showed multiple joint contractures, cryptorchidism and renal cortical cysts.
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PMID:Optiz trigonocephaly syndrome: report of two cases. 669 65

We describe a combination of multiple congenital anomalies, severe psychomotor retardation and symmetrical circumferential skin creases of arms and legs in a 4.5-year-old male. Craniofacial anomalies included: a high forehead, elongated face, bitemporal sparseness of hair, broad eyebrows, blepharophimosis, bilateral microphthalmia and microcornea, severe optic nerve hypoplasia, epicanthic folds, telecanthus, broad nasal bridge, puffy cheeks, microstomia, cleft palate, enamel hypoplasia, micrognathia, microtia with stenotic ear canals and posteriorly angulated ears. Head circumference was on the 10th centile and a CT scan showed dilated lateral ventricles. Intracranial pressure was not increased. Other abnormalities included: short stature, loose skin, hypotonia, pectus excavatum, inguinal and umbilical hernias, severe scoliosis, hypoplastic scrotum, long fingers and overlapping toes. Echocardiography showed tricuspid regurgitation. Chromosomes were apparently normal. Differentiation from "Michelin tire baby syndrome" and amniotic band sequence is discussed.
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PMID:New syndrome?: MCA/MR syndrome with multiple circumferential skin creases. 905 67

To delineate further the clinical spectrum of Menkes disease, an X-linked recessive disorder of copper transport, we studied 4 related males, ranging in age from 4-38 years, with a unique phenotype that combines manifestations of classical and mild Menkes disease and occipital horn syndrome (OHS). The propositus, and 18-year-old man, was evaluated following an intracerebral hemorrhage at age 15 years and was noted to have marked hypotonia, motor delay with mental retardation, bladder diverticula, failure to thrive, and diarrhea from infancy; seizures from age 3 years; and abnormal hair (pili torti) and face, cutis laxa, and multiple joint dislocations. Radiographic abnormalities included occipital exostoses, tortuous cerebral blood vessels with multiple branch occlusions, and hammer-shaped clavicles. Biochemical studies demonstrated reduced copper and ceruloplasmin levels in serum, and abnormal plasma catecholamine ratios. We reported previously the molecular defect in this family, a splice-site mutation that predicts formation of approximately 20% of the normal Menkes gene product [Kaler et al., 1994: Nat Genet 18:195-202]. Here, we detail the clinical course and physical features and radiographic findings in these 4 individuals, and compare their phenotype with classical and mild Menkes and OHS. Unusual Menkes disease variants such as this may escape recognition due to anomalies that appear inconsistent with the diagnosis, particularly prolonged survival and later onset of seizures. Males with mental retardation and connective tissue abnormalities should be evaluated for biochemical evidence of defective copper transport.
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PMID:Distinctive Menkes disease variant with occipital horns: delineation of natural history and clinical phenotype. 891 40

A newborn male was noted to have bilateral congenital corneal opacification. Findings from examination disclosed a variety of dysmorphic features, including cutis laxa, progeroid aspect, short stature, multiple hyperextensible subluxated joints, muscular hypotonia, and hyperreflexia. Bilateral penetrating keratoplasties were performed; histopathologic examination revealed diffuse epithelial thickening, loss of the Bowman layer, and stromal attenuation with anterior stromal scarring. Special stains showed no deposition of abnormal material in the corneas. Electron microscopy demonstrated absence of Bowman layer differentiation with a paucity of collagen fibers, as well as extensive small elastic fibers in the anterior stroma. The diagnosis of De Barsy syndrome was made, a rare progeroid syndrome associated with characteristic ocular, facial, skeletal, dermatologic, and neurologic abnormalities. De Barsy syndrome should be included in the differential diagnosis of congenital corneal opacification; its distinctive clinical features enable the clinician to easily differentiate it from other causes of congenitally cloudy corneas.
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PMID:Congenital corneal opacification in De Barsy syndrome. 1117 95

Macrocephaly-cutis marmorata telangiectatica congenita (M-CMTC) constitutes a distinct entity characterized by prenatal overgrowth, macrosomia, hemihypertrophy, macrocephaly, nonobstructive hydrocephaly, frontal bossing, hypotonia, developmental delay, generalized or facial capillary malformation with upper philtral nevus flammeus and cutis marmorata, joint hypermobility, loose skin, toe syndactyly, and postaxial polydactyly. All but one of the cases reported previously had benign clinical courses without showing an increased risk of early infant death. We describe three additional cases with poor clinical outcomes including severe postnatal growth failure, intractable cardiac arrhythmia in two cases, and sudden infant death in two cases. Arrhythmia has not been described previously as one of the symptoms of M-CMCT. Patients with M-CMTC associated with severe postnatal growth failure and arrhythmia may constitute a distinct clinical subtype of M-CMTC with an increased risk of life-threatening episodes or sudden death. Recognizing this clinical subtype of M-CMTC is important to prevent these serious potential complications.
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PMID:Association of arrhythmia and sudden death in macrocephaly-cutis marmorata telangiectatica congenita syndrome. 1147 7

We report on a 10-year-old patient with a provisionally new syndrome of MR/MCA with an evolving phenotype. Major findings at birth included short umbilical cord; striking hypotonia and cutis laxa with increased OFC; facial abnormalities with epicanthal folds, telecanthus, mild hypertelorism, wide flat nasal bridge, hypoplastic nose with upturned nostrils, and low-set dysplastic ears; asymmetric deformed chest with prominent sternum and winged scapulae; wider thumbs and halluces; left cryptorchidism and unusual perianal creases. Chromosomal and metabolic studies were normal. With aging, the phenotype has changed significantly: cutis laxa disappeared, the perianal creases and hypotonia are much milder, the initial apparent macrocephaly turned out to be true microcephaly, broad thumbs are less evident, but skeletal anomalies are more striking. Unsuccessful extensive diagnostic searches since birth and presentation in meetings suggest the presence of a private syndrome.
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PMID:Provisional new syndrome of MR/MCA with evolving phenotype. 1240 15


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