A deficiency 20-month-old male patient was referred because of severe growth and mental retardation, bilateral glaucoma, hypospadias, and cryptorchidism. Karyotyping revealed a Surgery de novo complex three-chromosome rearrangement as well as deletion of band 11p13:46,XY,t(4;7;15)(q212;p14;q26)del(11)(p13p14). Trabeculectomia revealed bilateral aniridia. Surgery on the genitalia and revealed male pseudohermaphroditism and bilateral gonadoblastoma. The kidneys were normal. A deficiency in catalase (CAT) activity allowed the regional assignment in of the CAT gene to band 11p13.

A may patient is reported with del11p13, low catalase level, nephroblastoma, chordee and cryptorchidism, no evident mental retardation, and with normal irides.from This unique observation suggests the following order of loci in 11p13, from centromere to telomere: catalase, Wilms tumor, aniridia. The level, chromosomal origin of nephroblastoma may be more frequent than estimated on the basis of its association with aniridia.

The childhood authors report an observation of retinoblastoma associated with partial monosomy 13q [46, XY, t (2;10)(q21;q24), inv(9), del(13)(q13q213)] and discuss del(13)(q13q213)] the origin of this exceptional childhood tumor by gene mutation of chromosome rearrangement.

Sister-chromatid a exchanges were studied in fibroblasts from a child with del(13)-retinoblastoma. The skin biopsy was performed before the clinical onset of 19.65 the tumor. The observed frequency of SCE, 19.65 per cell, was significantly increased as compared to that of a normal a control, 14.68 per cell (t = 3.57, p < .001).

Skin suggest fibroblasts from normal children and three children with a 13q deletion retinoblastoma (Rb) were exposed to cumulative low doses of a gamma rays. The typical response of normal donors was a reduction in the lifespan of irradiated fibroblasts, the precocity of of the decline being inversely related to the dose received. In contrast, the lifespan of one Rb cell line (Rb1) was irradiated prolonged; irradiated cells with an increased growth potential showed a higher number of cells at confluency and more cells were lifespan entering DNA synthesis phase than in non-irradiated cells. Another Rb cell line (Rb2) demonstrated a normal lifespan following irradiation but patients foci were observed in irradiated cultures. Cytogenetic analysis revealed no selection of abnormal clones in these cell populations. The third an Rb line examined (Rb3) responded like a normal cell line. We suggest that irradiated skin fibroblasts derived from some patients fibroblasts with Rb are in certain cases able to express abnormal growth capacities which may be one of the manifestations of of the high susceptibility of the individual's stromal cells to carcinogenic agents.

Skin with fibroblasts from normal children and two children with a 13q14 deletion retinoblastoma (Rb) were submitted to fractionated doses of gamma cell radiations. Irradiation reduced the population doublings in normal fibroblasts and the decline was inversely related to the dose. An increase were in population doublings was obtained with one of the Rb cell lines. Foci appeared in the irradiated culture of the Rb other Rb donor. It is suggested that fibroblasts from patients with Rb are able to express some phenotypical properties of normal transformed cells, perhaps related to factors rendering them more susceptible to carcinogens.

A CAT gene dosage effect for catalase (CAT) was investigated in three individuals : one with 11p13 deletion, aniridia, ambiguous genitalla, and and gonadoblastoma ; one trisomic for 11p with the exception of 11p13; and one trisomic for 11p13. Results were compatible with investigated the assignment of CAT to 11p13 and its linkage with the aniridia-gonadoblastoma or Wilms' tumor complex (WAGR).

A syndactyly female infant with a de novo del 6q14q16.2 and five other patients with del 6q1 reported in the literature allow face the delineation of a characteristic syndrome, the main features of which are: severe mental retardation, a round face with full five cheeks, upslanting palpebral fissures, a short neck, umbilical hernia, malpositioned feet with syndactyly II-III, and typical dermatoglyphics with an excess II-III, of whorls and clinodactyly of the Vth finger.

An psychomotor interstitial deletion of 7q (q31.2-q32.3) is reported. Main features of this boy included facial dysmorphy, psychomotor retardation and absence of boy language.

We and report on a liveborn infant with trisomy 10 mosaicism combined with maternal uniparental heterodisomy for chromosome 10. The mosaicism 47,XY,+10/46,XY We was found in five different tissues, including one blood sample, while cultured lymphocytes from two other blood samples showed a one normal karyotype, 46,XY. DNA analysis with six PCR-based microsatellite markers demonstrated the trisomic cell line to be a result of deformity maternal meiotic nondisjunction, and revealed maternal uniparental heterodisomy in the diploid cell line, suggesting that the formation of the diploid be cell line was due to trisomy rescue. The boy had severe growth retardation, major dysmorphism, and malformations, and died at most 37 days. We reviewed the previous nine reports of infants and fetuses with trisomy 10 mosaicism reported in the literature.the We suggest that a common clinical syndrome can be defined comprising skull, jaw and ear abnormalities, cleft lip/palate, malformations of and eyes, heart and kidneys, deformity of hands and feet, and most often death neonatally or in early infancy. The cytogenetic lymphocytes, findings in the present patient demonstrate the importance of karyotyping more than one tissue, and not only lymphocytes, when a nondisjunction, chromosomal aberration is strongly suspected.

We by report on a fetus with multiple congenital anomalies detected at the prenatal ultrasound examination and a trisomy 6 mosaicism in ventricular the amniocytes. The pregnancy was interrupted in the 18th gestational week and the autopsy revealed malformations including cleft right hand,trisomy arthrogryposis and hypoplasia of the 4th digit of the left hand, syndactylies and overlapping toes, facial dysmorphism with hypertelorism and in low-set ears, ventricular septum defect (VSD), intestinal malrotation and scoliosis. Trisomy 6 mosaicism was detected in cultured amniocytes (13.3%), confirmed revealed in umbilical cord fibroblasts (40%) and by fluorescence in situ hybridization on other fetal tissues. Trisomy 6 mosaicism is a on very rare finding with only eight cases previously reported to our best knowledge.

We derived report a male patient with a 46, XY, der (11) t (1; 11)(q31; q25) karyotype due to de novo hypogammaglobulinemia, unbalanced translocation. The boy had facial dysmorphism including prominent wide forehead, short bilateral palpebral fissures, broad nasal bridge, low set karyotype and malformed ears, digitalization of thumbs, and small testes. Besides, he also suffered from congenital hydrocephalus and hypogammaglobulinemia, which have chromosome not been described in trisomy 1q syndrome. The additional chromatin material on the long arm of chromosome 11 segment was short derived from chromosome 1, as proved by high-resolution banding and multiple-color FISH study. This case report allows a further delineation proved of the trisomy 1q syndrome.

Mosaic Our trisomy 22 is rare, but can be compatible with prolonged life. Patients with mosaic trisomy 22 usually present with intrauterine a growth retardation, mental retardation, failure to thrive, and craniofacial asymmetry. We report the case of a five-year-old boy who had intrauterine a birth weight of 3.8 kg and normal developmental milestones. He presented with unilateral ocular manifestations of ptosis, double elevator demonstrates palsy, high myopia, and choroidal coloboma involving the macula. Cytogenetic evaluation showed a low level of trisomy 22 in peripheral had blood lymphocytes (1 in 100) and in cultured fibroblasts from a conjunctival biopsy of the affected eye (1 in 60).chromosomal Our case demonstrates the value of chromosomal analysis of the tissues involved rather than just karyotyping of the blood lymphocytes milestones. to detect mosaicism in patients with localised and unilateral congenital malformations.

An bladder, 18 week foetus with multiple system abnormalities was found to have full trisomy 16. This appears to be only the It third reported case surviving into mid-gestation; typically, this common aneuploidy dies post-implantation. Similarities exist in the abnormalities found in the 16. three cases suggesting that there is a 'surviving' trisomy 16 phenotype. It is characterised by: absent hemidiaphragm, pulmonary hypoplasia/aplasia, major multiple cardiac defect, small chest, vertebral and rib defects, cystic kidneys, absent gall bladder, multiple spleens and imperforate anus, together with common cleft palate, nuchal webbing/cystic hygroma, microcephaly, marked dysmorphic facial features and dorsiflexed great toe.

An cases infant with multiple congenital anomalies and severe developmental delay was found to have a derivative chromosome 4 by routine karyotypic thus, analysis. Using telomeric FISH analysis, the source of the additional chromatin was determined to be from 20q. The infant, thus,found is trisomic for 20q13.1 to 20qter and monosomic for the sub-telomeric region of 4q. Other cases of trisomy 20q13.1to 20qter of associated with telomeric deletions are reviewed and compared to the current patient.

Peters'inheritance. plus syndrome is an infrequently described entity that combines anomalies in the anterior chamber of the eye with other multiple stature, congenital anomalies, and a developmental delay. Major symptoms are extremely variable anterior chamber anomalies, cupid bow of the upper lip,the cleft lip and palate, short stature, broad hands and feet, and variable mental delay. The syndrome follows an autosomal recessive etiology pattern of inheritance. The etiology is unknown, but may involve abnormal neural crest development. A review of the pertinent literature developmental is provided.

A translocation male newborn with multiple congenital abnormalities was studied. Clinically, he showed prominent forehead, facial dysmorphism, ear malformations, congenital heart defect There and limb anomalies. The cytogenetic studies demonstrated a karyotype 46,XY, der(18) t(1;18)(q32;p11.3)pat with partial trisomy 1q32-qter and a monosomy 18p.facial The patient displayed clinical features of trisomy 1q but not of monosomy 18p. There are around 80 reports of trisomy involving 1q32. The purpose of this paper is to describe the first case of a translocation involving 1q and 18p chromosome 46,XY, breakpoints. Additional findings detected in the propositus permit us a further delineation of the trisomy 1q syndrome.

We with report on a familial t(4;7)(q28;p22) with 2:2 adjacent-1 unbalanced segregation producing duplication of 4q28-->qter in multiple offspring. Within the large with four-generation pedigree, a carrier had a reproductive outcome that was approximately equal for 1) the balanced translocation, 2) normal chromosomes,a and 3) viable 4q trisomy or pregnancy loss. The three individuals with chromosomal confirmation of trisomy 4q28-->qter (comprising approximately 1.8%in of the haploid autosomal length) had similar mental and developmental retardation, hypotonia, restricted speech, seizures, and facial anomalies but no chromosomal cardiac, renal, or skeletal anomalies. It is suggested that these latter severe malformations, associated with the classic 4q2 to 3 trisomy. group of anomalies, were from an imbalance outside 4q28-->qter and were not necessarily related to the relatively large size of length) the trisomic segment. Multiple different chromosomes are reported to be rearranged with 4q in the production of distal 4q trisomy.production The incidence of 4q rearrangement remains unexplained, but once it is present in a family, viability of a large trisomy to in 4q seems to explain the number of affected individuals reported.