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Jawad syndrome(JWDS)

MedGen UID:
810673
Concept ID:
C0796063
Disease or Syndrome
Synonyms: JWDS; KELLY SYNDROME
SNOMED CT: Jawad syndrome (771470001)
Modes of inheritance:
Autosomal recessive inheritance
MedGen UID:
141025
Concept ID:
C0441748
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in individuals with two pathogenic alleles, either homozygotes (two copies of the same mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele).
 
Gene (location): RBBP8 (18q11.2)
 
Monarch Initiative: MONDO:0009622
OMIM®: 251255
Orphanet: ORPHA313795

Definition

Jawad syndrome (JWDS) is an autosomal recessive disorder characterized by congenital microcephaly, moderate to severely impaired intellectual development, and digital malformations including phalangeal joint swelling, clinodactyly, polydactyly, syndactyly, and total absence of nails (summary by Qvist et al., 2011). [from OMIM]

Clinical features

From HPO
Hallux valgus
MedGen UID:
5416
Concept ID:
C0018536
Anatomical Abnormality
Lateral deviation of the great toe (i.e., in the direction of the little toe).
Postaxial polydactyly
MedGen UID:
67394
Concept ID:
C0220697
Congenital Abnormality
Polydactyly refers to the occurrence of supernumerary digits and is the most frequent of congenital hand and foot deformities. Based on the location of the extra digits, polydactyly can be classified into preaxial, involving the thumb or great toe; postaxial, affecting the fifth digit; and central, involving the 3 central digits. Postaxial polydactyly (PAP) is further subclassified into 2 types: in type A, a well-formed extra digit articulates with the fifth or a sixth metacarpal, whereas in type B, a rudimentary, poorly developed extra digit is present (summary by Umm-e-Kalsoom et al., 2012). Genetic Heterogeneity of Postaxial Polydactyly Other forms of postaxial polydactyly type A include PAPA2 (602085) on chromosome 13q21; PAPA3 (607324) on chromosome 19p13; PAPA4 (608562) on chromosome 7q22; PAPA5 (263450) on chromosome 13q13; PAPA6 (615226), caused by mutation in the ZNF141 gene (194648) on chromosome 4p16; PAPA7 (617642), caused by mutation in the IQCE gene (617631) on chromosome 7p22; PAPA8 (618123), caused by mutation in the GLI1 gene (165220) on chromosome 12q13; PAPA9 (618219), caused by mutation in the CIBAR1 gene (617273) on chromosome 8q22; and PAPA10 (618498), caused by mutation in the KIAA0825 gene (617266) on chromosome 5q15.
Short middle phalanx of the 5th finger
MedGen UID:
322335
Concept ID:
C1834060
Anatomical Abnormality
Hypoplastic/small middle phalanx of the fifth finger.
4-5 toe syndactyly
MedGen UID:
324891
Concept ID:
C1837836
Finding
Syndactyly with fusion of toes four and five.
Single interphalangeal crease of fifth finger
MedGen UID:
376762
Concept ID:
C1850336
Finding
Presence of only one (instead of two, as normal) interphalangeal crease of the fifth finger.
Absent fourth finger distal interphalangeal crease
MedGen UID:
867261
Concept ID:
C4021621
Anatomical Abnormality
Absence of the distal interphalangeal flexion creases of the fourth finger.
Aggressive behavior
MedGen UID:
1375
Concept ID:
C0001807
Individual Behavior
Behavior or an act aimed at harming a person, animal, or physical property (e.g., acts of physical violence; shouting, swearing, and using harsh language; slashing someone's tires).
Global developmental delay
MedGen UID:
107838
Concept ID:
C0557874
Finding
A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.
Intellectual disability
MedGen UID:
811461
Concept ID:
C3714756
Mental or Behavioral Dysfunction
Intellectual disability, previously referred to as mental retardation, is characterized by subnormal intellectual functioning that occurs during the developmental period. It is defined by an IQ score below 70.
Retrognathia
MedGen UID:
19766
Concept ID:
C0035353
Congenital Abnormality
An abnormality in which the mandible is mislocalised posteriorly.
Thoracic scoliosis
MedGen UID:
387910
Concept ID:
C1857790
Anatomical Abnormality
Primary microcephaly
MedGen UID:
383046
Concept ID:
C2677180
Finding
Head circumference below 2 standard deviations below the mean for age and gender at birth.
Prominent nose
MedGen UID:
98423
Concept ID:
C0426415
Finding
Distance between subnasale and pronasale more than two standard deviations above the mean, or alternatively, an apparently increased anterior protrusion of the nasal tip.
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.
Anonychia
MedGen UID:
120563
Concept ID:
C0265998
Congenital Abnormality
Congenital anonychia is defined as the absence of fingernails and toenails. Anonychia and its milder phenotypic variant, hyponychia, usually occur as a feature of genetic syndromes, in association with significant skeletal and limb anomalies. Isolated nonsyndromic congenital anonychia/hyponychia is a rare entity that usually follows autosomal recessive inheritance with variable expression, even within a given family. The nail phenotypes observed range from no nail field to a nail field of reduced size with an absent or rudimentary nail (summary by Bruchle et al., 2008). This form of nail disorder is referred to here as nonsyndromic congenital nail disorder-4 (NDNC4). For a list of other nonsyndromic congenital nail disorders and a discussion of genetic heterogeneity, see NDNC1 (161050).

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVJawad syndrome

Recent clinical studies

Prognosis

Batool T, Irshad S, Riaz M, Mahmood Baig S, Nuernberg P, Hussain MS
J Hum Genet 2023 Jul;68(7):469-475. Epub 2023 Mar 3 doi: 10.1038/s10038-023-01132-6. PMID: 36864288

Clinical prediction guides

Batool T, Irshad S, Riaz M, Mahmood Baig S, Nuernberg P, Hussain MS
J Hum Genet 2023 Jul;68(7):469-475. Epub 2023 Mar 3 doi: 10.1038/s10038-023-01132-6. PMID: 36864288
Qvist P, Huertas P, Jimeno S, Nyegaard M, Hassan MJ, Jackson SP, Børglum AD
PLoS Genet 2011 Oct;7(10):e1002310. Epub 2011 Oct 6 doi: 10.1371/journal.pgen.1002310. PMID: 21998596Free PMC Article
Hassan MJ, Chishti MS, Jamal SM, Tariq M, Ahmad W
Hum Genet 2008 Feb;123(1):77-82. Epub 2007 Dec 11 doi: 10.1007/s00439-007-0452-x. PMID: 18071751

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