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Neu-Laxova syndrome 2(NLS2)

MedGen UID:
863456
Concept ID:
C4015019
Disease or Syndrome
Synonyms: NEU-LAXOVA SYNDROME 2; NLS2
 
Gene (location): PSAT1 (9q21.2)
 
Monarch Initiative: MONDO:0014466
OMIM®: 616038
Orphanet: ORPHA583602

Definition

Neu-Laxova syndrome-2 (NLS2) is a rare autosomal recessive disorder characterized by a recognizable pattern of severe congenital malformations leading to prenatal or early postnatal lethality. Affected individuals have abnormal craniofacial features, microcephaly, intrauterine growth retardation, ichthyosis, flexion deformities, limb malformations, and edema of the hands and feet. Some patients have malformations of the central nervous system, such as abnormal gyration (summary by Acuna-Hidalgo et al., 2014). For a discussion of genetic heterogeneity of Neu-Laxova syndrome, see NLS1 (256520). [from OMIM]

Clinical features

From HPO
Finger syndactyly
MedGen UID:
65139
Concept ID:
C0221352
Congenital Abnormality
Webbing or fusion of the fingers, involving soft parts only or including bone structure. Bony fusions are referred to as "bony" Syndactyly if the fusion occurs in a radio-ulnar axis. Fusions of bones of the fingers in a proximo-distal axis are referred to as "Symphalangism".
Congenital vertical talus
MedGen UID:
66821
Concept ID:
C0240912
Congenital Abnormality
Congenital vertical talus (CVT), also known as 'rocker-bottom foot' deformity, is a dislocation of the talonavicular joint characterized by vertical orientation of the talus with a rigid dorsal dislocation of the navicular, equinus deformity of the calcaneus, abduction deformity of the forefoot, and contracture of the soft tissues of the hind- and mid-foot. This condition is usually associated with multiple other congenital deformities and only rarely is an isolated deformity with familial occurrence (summary by Levinsohn et al., 2004). The condition is transmitted in an autosomal dominant pattern of inheritance, and sometimes shows incomplete penetrance and variable expressivity. There may be a broad spectrum of deformities, including flatfoot, talipes equinovarus (TEV or clubfoot), cavus foot, metatarsus adductus, and even hypoplasia of the tibia (summary by Dobbs et al., 2006).
Toe syndactyly
MedGen UID:
75581
Concept ID:
C0265660
Congenital Abnormality
Webbing or fusion of the toes, involving soft parts only or including bone structure. Bony fusions are referred to as "bony" Syndactyly if the fusion occurs in a radio-ulnar axis. Fusions of bones of the toes in a proximo-distal axis are referred to as "Symphalangism".
Fetal growth restriction
MedGen UID:
4693
Concept ID:
C0015934
Pathologic Function
An abnormal restriction of fetal growth with fetal weight below the tenth percentile for gestational age.
Protuberant abdomen
MedGen UID:
340750
Concept ID:
C1854928
Finding
A thrusting or bulging out of the abdomen.
Low-set ears
MedGen UID:
65980
Concept ID:
C0239234
Congenital Abnormality
Upper insertion of the ear to the scalp below an imaginary horizontal line drawn between the inner canthi of the eye and extending posteriorly to the ear.
Spina bifida
MedGen UID:
38283
Concept ID:
C0080178
Congenital Abnormality
Incomplete closure of the embryonic neural tube, whereby some vertebral arches remain unfused and open. The mildest form is spina bifida occulta, followed by meningocele and meningomyelocele.
Lissencephaly
MedGen UID:
78604
Concept ID:
C0266463
Finding
A spectrum of malformations of cortical development caused by insufficient neuronal migration that subsumes the terms agyria, pachygyria and subcortical band heterotopia. See also neuropathological definitions for 2-, 3-, and 4-layered lissencephaly.
Cerebellar hypoplasia
MedGen UID:
120578
Concept ID:
C0266470
Congenital Abnormality
Cerebellar hypoplasia is a descriptive term implying a cerebellum with a reduced volume, but a normal shape and is stable over time.
Ventriculomegaly
MedGen UID:
480553
Concept ID:
C3278923
Finding
An increase in size of the ventricular system of the brain.
Micrognathia
MedGen UID:
44428
Concept ID:
C0025990
Congenital Abnormality
Developmental hypoplasia of the mandible.
Scoliosis
MedGen UID:
11348
Concept ID:
C0036439
Disease or Syndrome
The presence of an abnormal lateral curvature of the spine.
Microcephaly
MedGen UID:
1644158
Concept ID:
C4551563
Finding
Head circumference below 2 standard deviations below the mean for age and gender.
Edema
MedGen UID:
4451
Concept ID:
C0013604
Pathologic Function
An abnormal accumulation of fluid beneath the skin, or in one or more cavities of the body.
High palate
MedGen UID:
66814
Concept ID:
C0240635
Congenital Abnormality
Height of the palate more than 2 SD above the mean (objective) or palatal height at the level of the first permanent molar more than twice the height of the teeth (subjective).
Ablepharon
MedGen UID:
120585
Concept ID:
C0266574
Congenital Abnormality
Absent eyelids.
Short neck
MedGen UID:
99267
Concept ID:
C0521525
Finding
Diminished length of the neck.
Depressed nasal ridge
MedGen UID:
334631
Concept ID:
C1842876
Finding
Lack of prominence of the nose resulting from a posteriorly-placed nasal ridge.
Sloping forehead
MedGen UID:
346640
Concept ID:
C1857679
Finding
Inclination of the anterior surface of the forehead from the vertical more than two standard deviations above the mean (objective); or apparently excessive posterior sloping of the forehead in a lateral view.
Cleft palate
MedGen UID:
756015
Concept ID:
C2981150
Congenital Abnormality
Cleft palate is a developmental defect of the palate resulting from a failure of fusion of the palatine processes and manifesting as a separation of the roof of the mouth (soft and hard palate).
Ichthyosis
MedGen UID:
7002
Concept ID:
C0020757
Disease or Syndrome
An abnormality of the skin characterized the presence of excessive amounts of dry surface scales on the skin resulting from an abnormality of keratinization.
Polyhydramnios
MedGen UID:
6936
Concept ID:
C0020224
Pathologic Function
The presence of excess amniotic fluid in the uterus during pregnancy.
Decreased fetal movement
MedGen UID:
68618
Concept ID:
C0235659
Finding
An abnormal reduction in quantity or strength of fetal movements.
Wide intermamillary distance
MedGen UID:
473489
Concept ID:
C1827524
Finding
A larger than usual distance between the left and right nipple.
Proptosis
MedGen UID:
41917
Concept ID:
C0015300
Disease or Syndrome
An eye that is protruding anterior to the plane of the face to a greater extent than is typical.
Hypertelorism
MedGen UID:
9373
Concept ID:
C0020534
Finding
Although hypertelorism means an excessive distance between any paired organs (e.g., the nipples), the use of the word has come to be confined to ocular hypertelorism. Hypertelorism occurs as an isolated feature and is also a feature of many syndromes, e.g., Opitz G syndrome (see 300000), Greig cephalopolysyndactyly (175700), and Noonan syndrome (163950) (summary by Cohen et al., 1995).
Cataract
MedGen UID:
39462
Concept ID:
C0086543
Disease or Syndrome
A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVNeu-Laxova syndrome 2

Professional guidelines

PubMed

Han J, Yang YD, He Y, Liu WJ, Zhen L, Pan M, Yang X, Zhang VW, Liao C, Li DZ
Prenat Diagn 2020 Apr;40(5):577-584. Epub 2020 Feb 10 doi: 10.1002/pd.5653. PMID: 31994750

Recent clinical studies

Etiology

Marchesani F, Michielon A, Viale E, Bianchera A, Cavazzini D, Pollegioni L, Murtas G, Mozzarelli A, Bettati S, Peracchi A, Campanini B, Bruno S
Biomolecules 2023 Aug 4;13(8) doi: 10.3390/biom13081219. PMID: 37627284Free PMC Article
ten Donkelaar HJ, Wesseling P, Semmekrot BA, Liem KD, Tuerlings J, Cruysberg JR, de Wit PE
Acta Neuropathol 1999 Aug;98(2):203-11. doi: 10.1007/s004010051070. PMID: 10442561
Muller LM, de Jong G, Mouton SC, Greeff MJ, Kirby P, Hewlett R, Jordaan HF
Am J Med Genet 1987 Feb;26(2):421-9. doi: 10.1002/ajmg.1320260221. PMID: 3544847

Diagnosis

Marchesani F, Michielon A, Viale E, Bianchera A, Cavazzini D, Pollegioni L, Murtas G, Mozzarelli A, Bettati S, Peracchi A, Campanini B, Bruno S
Biomolecules 2023 Aug 4;13(8) doi: 10.3390/biom13081219. PMID: 37627284Free PMC Article
Elliott AM, Gonzales M, Hoeffel JC, Le Merrer M, Maroteaux P, Encha-Razavi F, Joye N, Berchel C, Fliegel C, Aughton DJ, Beaudry-Rodgers K, Hasteh F, Nerlich AG, Wilcox WR, Rimoin DL, Lachman RS, Freisinger P
Am J Med Genet 2002 Apr 22;109(2):139-48. doi: 10.1002/ajmg.10324. PMID: 11977163
Driggers RW, Isbister S, McShane C, Stone K, Blakemore K
Prenat Diagn 2002 Feb;22(2):118-20. doi: 10.1002/pd.228. PMID: 11857616
Muller LM, de Jong G, Mouton SC, Greeff MJ, Kirby P, Hewlett R, Jordaan HF
Am J Med Genet 1987 Feb;26(2):421-9. doi: 10.1002/ajmg.1320260221. PMID: 3544847
Lazjuk GI, Lurie IW, Ostrowskaja TI, Cherstvoy ED, Kirillova IA, Nedzved MK, Usoev SS
Am J Med Genet 1979;3(3):261-7. doi: 10.1002/ajmg.1320030304. PMID: 225952

Prognosis

Elliott AM, Gonzales M, Hoeffel JC, Le Merrer M, Maroteaux P, Encha-Razavi F, Joye N, Berchel C, Fliegel C, Aughton DJ, Beaudry-Rodgers K, Hasteh F, Nerlich AG, Wilcox WR, Rimoin DL, Lachman RS, Freisinger P
Am J Med Genet 2002 Apr 22;109(2):139-48. doi: 10.1002/ajmg.10324. PMID: 11977163
ten Donkelaar HJ, Wesseling P, Semmekrot BA, Liem KD, Tuerlings J, Cruysberg JR, de Wit PE
Acta Neuropathol 1999 Aug;98(2):203-11. doi: 10.1007/s004010051070. PMID: 10442561

Clinical prediction guides

ten Donkelaar HJ, Wesseling P, Semmekrot BA, Liem KD, Tuerlings J, Cruysberg JR, de Wit PE
Acta Neuropathol 1999 Aug;98(2):203-11. doi: 10.1007/s004010051070. PMID: 10442561
Ejeckam GG, Wadhwa JK, Williams JP, Lacson AG
Pediatr Pathol 1986;5(3-4):295-306. doi: 10.3109/15513818609068856. PMID: 3786261
Lazjuk GI, Lurie IW, Ostrowskaja TI, Cherstvoy ED, Kirillova IA, Nedzved MK, Usoev SS
Am J Med Genet 1979;3(3):261-7. doi: 10.1002/ajmg.1320030304. PMID: 225952

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