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Biomedical subjects

R Mingarelli

Publications and source records attributed to R Mingarelli.

At least 73 records · Page 4Linked to original sources
PubMed1994

Hypoparathyroidism as the major manifestation in two patients with 22q11 deletions.

We report on two adolescents with 22q11 deletion. Their main clinical manifestation was chronic symptomatic hypocalcemia secondary to hypoparathyroidism, together with seizures and cerebral calcifications. Neither congenital cardiac abnormality nor T cell deficiency were detected. The phenotypic manifestations of the observed patients were consistent with velo-cardio-facial syndrome (VCFS). A microdeletion of chromosome region 22q11 has been demonstrated in approximately 90% of DiGeorge syndrome (DGS) patients and in 75% of VCFS patients; the association of the deletion with a wide spectrum of clinical findings suggests the existence of a contiguous gene syndrome. The presence of certain traits of DGS/VCFS should lead to investigations of the parathyroid function and molecular analysis of the 22q11 region hybridization studies.

Adolescent↗
PubMed1994

Prenatal diagnosis of X-linked retinitis pigmentosa (RP) in five pregnancies at risk.

Five pregnancies at risk for X-linked retinitis pigmentosa (RP) have been monitored by first-trimester prenatal diagnosis using DNA markers flanking the RP2 and RP3 loci. Three affected and two unaffected fetuses, including a female carrying a wild-type genotype, were predicted on the basis of marker segregation and estimation of the recombination fraction.

DNA Probes↗
PubMed1994

Onychotrichodysplasia and chronic neutropenia without mental retardation (ONS): a second case report.

Onychotrichodysplasia, chronic neutropenia and mental retardation syndrome (ONMRS) is a rare autosomal recessive mutation, mostly reported in patients of Mexican ancestry. We describe a second patient with onychotrichodysplasia and chronic neutropenia without mental retardation (ONS). It is unclear if ONS found in the two European patients with normal mental development is due to genetic heterogeneity or variable expressivity of the same syndrome.

Adult↗
PubMed1994

Congenital cardiac defect in a patient with mosaic 45,X/46,XX,i(21q) karyotype.

A baby is described with 45,X/46,XX,i(21q) mosaicism. DNA analysis indicated that the abnormality arose from two independent postzygotic mutations in a 46,XX zygote, involving the paternal chromosomes 21 and X. In agreement with previous reports, most of the clinical dysmorphisms observed were consistent with Down syndrome. Moreover, congenital heart disease consisted of an atrioventricular canal associated with slight hypoplasia of the left ventricle and a mitral anulus, a complex defect including features found in both Down and Turner syndromes.

Chromosome Aberrations↗
PubMed1994

A newborn with ring chromosome 10, aganglionic megacolon, and renal hypoplasia.

A newborn infant is reported who had aganglionic megacolon, renal hypoplasia, severe growth retardation, generalised hypotonia, and various dysmorphic features. Chromosome analysis of lymphocytes and fibroblasts showed a ring chromosome 10 with breakpoints at p13-15 and q26. AluI digestion showed that the ring chromosome was monocentric. FISH with an alpha satellite probe specific for chromosome 10 showed one signal only in about 20% of interphase nuclei. It is suggested that aganglionic megacolon could result from dynamic somatic mosaicism owing to loss of the ring chromosome.

Chromosome Mapping↗
PubMed1994

Trisomy 8 syndrome owing to isodicentric 8p chromosomes: regional assignment of a presumptive gene involved in corpus callosum development.

Two patients with trisomy 8 syndrome owing to an isodicentric 8p;8p chromosome are described. Case 1 had a 46,XX/46,XX,-8,+idic(8)(p23) karyotype while case 2, a male, had the same abnormal karyotype without evidence of mosaicism. In situ hybridisation, performed in case 1, showed that the isochromosome was asymmetrical. Agenesis of the corpus callosum (ACC), which is a feature of trisomy 8 syndrome, was found in both patients. Although ACC is associated with aneuploidies for different chromosomes, a review of published reports indicates that, when associated with chromosome 8, this defect is the result of duplication of a gene located within 8p21-pter. Molecular analysis in one of our patients led us to exclude the distal 23 Mb of 8p from this ACC region.

Abnormalities, Multiple↗
PubMed1994

Molecular characterization of two extra marker chromosomes detected at prenatal diagnosis.

Two non-familial extra supernumerary abnormal chromosomes (ESAC) were detected in fetuses monitored by midtrimes ter amniocentesis. Characterization of these ESACs was carried out using conventional cytogenetic analysis, fluorescence in situ hybridization, and DNAse I hypersensitivity. Based on these studies it was concluded that the two ESACs were derived respectively from chromosomes 14/22 and isodicentric chromosome 15. Based on cytogenetic results it was argued that unconsistent phenotypic effect was associated with the two aneuploidies. This optimistic view was confirmed at birth of unaffected babies and unremarkable follow up at 6 and 12 months.

Adult↗
PubMed1993

On the parental origin of the X's in a prenatally diagnosed 49,XXXXX syndrome.

A 49,XXXXX fetus was detected in amniotic fluid cell cultures from a 39-year-old mother. On ultrasonography, growth retardation and bilateral radioulnar synostosis were found. Additional clinical manifestations were mild facial anomalies and hypoplastic ovaries depleted of oocytes. Molecular analysis showed that this aneuploidy arose by successive maternal non-disjunction.

Adult↗
PubMed1993

Coarctation of the aorta, interrupted aortic arch, and hypoplastic left heart syndrome in three generations.

Five members in three generations of a family were affected by a congenital heart disease. Four of them had mild or severe coarctation of the aorta (CoA), either isolated or in association with other cardiac defects. Fetal echocardiography allowed prenatal diagnosis in one pregnancy at risk. This family suggests that a rare form of CoA could be the result of an autosomal dominant mutation with high penetrance and variable expressivity rather than polygenic inheritance.

Adult↗
PubMed1993

Prenatal diagnosis of deletion 11q23-->qter. Report of two unrelated cases.

Two cases of de novo deletion of the region distal to 11q23 were detected at cordocentesis, following sonographic evidence of malformations. Consistent findings in both fetuses were an abnormal amount of amniotic fluid, growth retardation, heart and renal defects. At delivery, the characteristic facial dysmorphisms of del(11q23) syndrome were also detected, including trigonocephaly, hypertelorism, abnormal slant of palpebral fissures, micrognathia and abnormal ears.

Adult↗
PubMed1992

Baller-Gerold syndrome: case report and clinical and radiological review.

The major manifestations of the Baller-Gerold syndrome (BGS) are craniosynostosis and preaxial limb anomaly involving the radius and/or the thumb. We report on a new patient with coronal and sagittal suture involvement, mild unilateral radial and thumb hypoplasia, imperforate anus, rectovaginal fistula, prenatal onset growth deficiency, and mental retardation. This patient also had some minor oral-facial anomalies, severe nonfamilial myopia, bilateral conductive hearing loss, ureteric reflux, and skeletal anomalies other than those noted in the skull and upper limbs. This patient confirms the clinical variability among the patients and the wide pleiotropic effects of the BGS gene.

Abnormalities, Multiple↗