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Specialty. Medical genetics. Distal 18q- is a genetic condition caused by a deletion of genetic material within one of the two copies of chromosome 18. [1] The deletion involves the distal section of 18q and typically extends to the tip of the long arm of chromosome 18. [2]
Individuals with ring 18 have one of their two copies of chromosome 18 that has formed the shape of a ring. The ring is formed when the caps on both the long arm (q) and the short arm (p) of one copy of chromosome 18 are lost and the new ends re-join to form the ring. Because the ring involves deletions of both the long arm (18q-) and the short ...
Tethered cord syndrome ( TCS) refers to a group of neurological disorders that relate to malformations of the spinal cord. [1] Various forms include tight filum terminale, lipomeningomyelocele, split cord malformations ( diastematomyelia ), occult, dermal sinus tracts, and dermoids . All forms involve the pulling of the spinal cord at the base ...
Proximal 18q-is a rare genetic condition caused by a deletion of genetic material within one of the two copies of chromosome 18. This deletion involves the proximal (near the centromere ) section of the long arm of chromosome 18 somewhere between 18q11.2 (18.9 Mb) to 18q21.1 (43.8 Mb). [1]
Wolf–Hirschhorn syndrome is a microdeletion syndrome caused by a deletion within HSA band 4p16.3 of the short arm of chromosome 4, particularly in the region of WHSCR1 and WHSCR2. [7] The phenotypic characteristics of WHS are thought to be caused by the haploinsufficiency of the genes Wolf-Hirschhorn syndrome candidate 1 (WHSC1), which is ...
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Miller–Dieker syndrome, Miller–Dieker lissencephaly syndrome (MDLS), and chromosome 17p13.3 deletion syndrome [1] is a micro deletion syndrome characterized by congenital malformations. Congenital malformations are physical defects detectable in an infant at birth which can involve many different parts of the body including the brain ...
Distal intestinal obstruction syndrome. Small intestine (at center) Distal intestinal obstruction syndrome ( DIOS) involves obstruction of the distal part of the small intestines by thickened intestinal content and occurs in about 20% of mainly adult individuals with cystic fibrosis. [1] DIOS was previously known as meconium ileus equivalent, a ...