Mosaic trisomy 22: report of a patient with normal intelligence.
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Child, Preschool↗
Biomedical subjects
Yves Lacassie
Publications and source records attributed to Yves Lacassie.
De novo paracentric inversion (X)(q26q28) with features mimicking Prader-Willi syndrome.
Different genetic and non-genetic disorders, including several chromosomal abnormalities, may mimic Prader-Willi syndrome (PWS). We report on an 11-year-old girl with features reminiscent of PWS due to an unreported de novo paracentric inversion Xq26q28. Microdeletion 15q11-q13 and maternal uniparental disomy 15 were ruled out. The importance of chromosomal studies in addition to molecular analysis on patients with features suggestive of PWS is stressed.
Child↗
Congenital glaucoma and neurofibromatosis in a monozygotic twin: case report and review of the literature.
We describe a dramatic case of an identical twin presenting at birth with unilateral congenital glaucoma. Because of the suspicion of neurofibromatosis 1 a magnetic resonance image of the neural axis was obtained, which revealed a plexiform neurofibroma with spinal cord impingement. Diagnosis of neurofibromatosis 1 was confirmed by 3 months of age with the emergence of café-au-lait spots. This case was compared with all 19 reports published in the English literature of neurofibromatosis 1 associated with congenital glaucoma. Initial presentation, family history, characteristics ofthe clinical syndrome, and outcome of glaucoma in infants with neurofibromatosis 1 and congenital glaucoma were reviewed. A plexiform neurofibroma of the ipsilateral eyelid was present in eight patients and ipsilateral facial hypertrophy occurred in three patients. Café-au-lait spots appeared between the ages of 5 weeks and 8 years; none of the patients were reported to have café-au-lait spots at birth. Newborns with unilateral congenital glaucoma should raise high suspicion for neurofibromatosis 1 and its associated findings, which might need immediate intervention.
Cafe-au-Lait Spots↗
Provisional new syndrome of MR/MCA with evolving phenotype.
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.
Abnormalities, Multiple↗
Use of a multiaxial diagnostic system in clinical genetics.
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Genetic Counseling↗
Scoliosis in velo-cardio-facial syndrome.
Velo-cardio-facial (VCF) syndrome caused by 22q11.2 deletion is a common genetic condition with variable features including congenital heart defects, facial anomalies, palatal anomalies, and cognitive problems. Besides the main characteristics, various other anomalies have been noted, including musculoskeletal problems. Scoliosis has been mentioned but not emphasized as a common feature. The authors evaluated 20 patients for scoliosis and connective tissue anomalies who were consecutively diagnosed with VCF syndrome and 22q11.2 deletion at their clinics. The authors describe three children with VCF syndrome who had significant scoliosis and connective tissue findings. Two of these patients were initially referred to genetics for possible Marfan syndrome. The authors suggest that scoliosis should be considered a relatively common finding in patients with 22q11.2 deletion, and they should be monitored for this problem. In addition, 22q11.2 deletion should be among the diagnostic considerations in patients with unexplained scoliosis and developmental delay.
Abnormalities, Multiple↗
EXIT procedure: a case report.
The EXIT (Ex-Utero Intrapartum Treatment) procedure is an extremely valuable tool in providing time to secure the airway in infants with large fetal neck masses and abnormalities of the upper airway which impede resuscitation. The fetus is partially delivered while maintaining utero-placental-fetal circulation. We report the use of this technique in a case of huge cystic hygromas of the neck and chest due to a nuchal bleb-lethal dysplasia. Although severe pulmonary hypoplasia precluded an optimal outcome, this report shows that this procedure is technically feasible. We believe this to be the first case performed and reported in Louisiana.
Abnormalities, Multiple↗