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1.

Opitz G/BBB syndrome

Opitz G/BBB syndrome (OS) is a multiple congenital anomalies disorder characterized by malformations of the midline including hypertelorism, laryngo-tracheo-esophalgeal defects and hypospadias. There are two clinically indistinguishable genetic subtypes of Opitz G/BBB: X-linked Opitz G/BBB syndrome (XLOS), and autosomal dominant Opitz G/BBB syndrome (ADOS) (see these terms). [from ORDO]

MedGen UID:
831083
Concept ID:
CN202554
Disease or Syndrome
2.

Opitz-Frias syndrome

X-linked Opitz G/BBB syndrome (XLOS) is a multiple congenital anomaly disorder characterized by facial anomalies (ocular hypertelorism, prominent forehead, widow's peak, broad nasal bridge, anteverted nares), laryngotracheoesophageal defects, and genitourinary abnormalities (hypospadias, cryptorchidism, and hypoplastic/bifid scrotum). Developmental delay and intellectual disability are observed in about 50% of affected males. Cleft lip and/or palate are present in approximately 50% of affected individuals. Other malformations present in fewer than 50% of individuals include congenital heart defects, imperforate or ectopic anus, and midline brain defects (Dandy-Walker malformation and agenesis or hypoplasia of the corpus callosum and/or cerebellar vermis). Wide clinical variability occurs even among members of the same family. Female carriers usually manifest only ocular hypertelorism. [from GeneReviews]

MedGen UID:
104493
Concept ID:
C0175696
Congenital Abnormality; Disease or Syndrome
3.

Smith-Lemli-Opitz syndrome

Smith-Lemli-Opitz syndrome (SLOS) is a congenital multiple anomaly syndrome caused by an abnormality in cholesterol metabolism resulting from deficiency of the enzyme 7-dehydrocholesterol (7-DHC) reductase. It is characterized by prenatal and postnatal growth retardation, microcephaly, moderate to severe intellectual disability, and multiple major and minor malformations. The malformations include distinctive facial features, cleft palate, cardiac defects, underdeveloped external genitalia in males, postaxial polydactyly, and 2-3 syndactyly of the toes. The clinical spectrum is wide and individuals have been described with normal development and only minor malformations. [from GeneReviews]

MedGen UID:
61231
Concept ID:
C0175694
Congenital Abnormality; Disease or Syndrome
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