U.S. flag

An official website of the United States government

Format

Send to:

Choose Destination

Chromosome 3q29 microduplication syndrome

MedGen UID:
440897
Concept ID:
C2749873
Disease or Syndrome
Synonyms: 3q29 microduplication syndrome ; CHROMOSOME 3q29 DUPLICATION SYNDROME
SNOMED CT: 3q29 microduplication (717973004); Trisomy 3q29 (717973004); Chromosome 3q29 duplication syndrome (717973004)
Modes of inheritance:
Autosomal dominant inheritance
MedGen UID:
141047
Concept ID:
C0443147
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 heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele.
Not genetically inherited
MedGen UID:
988794
Concept ID:
CN307044
Finding
Source: Orphanet
clinical entity without genetic inheritance.
 
Monarch Initiative: MONDO:0012761
OMIM®: 611936
Orphanet: ORPHA251038

Definition

3q29 microduplication syndrome (also known as 3q29 duplication syndrome) is a condition that results from the copying (duplication) of a small piece of chromosome 3 in each cell. The duplication occurs on the long (q) arm of the chromosome at a position designated q29.

The features associated with 3q29 microduplication syndrome vary widely. Some individuals with this chromosomal change have very mild or no related signs and symptoms, and the duplication is discovered because they undergo genetic testing only after a family member is diagnosed. Other people with a 3q29 microduplication have delayed development (particularly speech delay) and intellectual disability or learning difficulties. Although most affected individuals have no major birth defects, eye abnormalities, heart defects, and an unusually small head (microcephaly) can occur. 3q29 microduplication syndrome may increase the likelihood of being overweight or having obesity, although it is hard to determine whether these weight issues are caused by the duplication. [from MedlinePlus Genetics]

Clinical features

From HPO
Pes planus
MedGen UID:
42034
Concept ID:
C0016202
Anatomical Abnormality
A foot where the longitudinal arch of the foot is in contact with the ground or floor when the individual is standing; or, in a patient lying supine, a foot where the arch is in contact with the surface of a flat board pressed against the sole of the foot by the examiner with a pressure similar to that expected from weight bearing; or, the height of the arch is reduced.
Multiple palmar creases
MedGen UID:
354610
Concept ID:
C1861872
Finding
The presence of multiple creases on the palm of the hand (more than the normal three major creases (distal transverse crease, proximal transverse crease, and thenar crease).
Obesity
MedGen UID:
18127
Concept ID:
C0028754
Disease or Syndrome
Accumulation of substantial excess body fat.
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.
Macrocephaly
MedGen UID:
745757
Concept ID:
C2243051
Finding
Occipitofrontal (head) circumference greater than 97th centile compared to appropriate, age matched, sex-matched normal standards. Alternatively, a apparently increased size of the cranium.
Microcephaly
MedGen UID:
1644158
Concept ID:
C4551563
Finding
Head circumference below 2 standard deviations below the mean for age and gender.
Blepharophimosis
MedGen UID:
2670
Concept ID:
C0005744
Congenital Abnormality
A fixed reduction in the vertical distance between the upper and lower eyelids with short palpebral fissures.
Round face
MedGen UID:
116087
Concept ID:
C0239479
Finding
The facial appearance is more circular than usual as viewed from the front.
Bulbous nose
MedGen UID:
66013
Concept ID:
C0240543
Finding
Increased volume and globular shape of the anteroinferior aspect of the nose.
Downslanted palpebral fissures
MedGen UID:
98391
Concept ID:
C0423110
Finding
The palpebral fissure inclination is more than two standard deviations below the mean.
Short palpebral fissure
MedGen UID:
98067
Concept ID:
C0423112
Finding
Distance between the medial and lateral canthi is more than 2 SD below the mean for age (objective); or, apparently reduced length of the palpebral fissures.
Long face
MedGen UID:
324419
Concept ID:
C1836047
Finding
Facial height (length) is more than 2 standard deviations above the mean (objective); or, an apparent increase in the height (length) of the face (subjective).
Wide nasal bridge
MedGen UID:
341441
Concept ID:
C1849367
Finding
Increased breadth of the nasal bridge (and with it, the nasal root).
Short nose
MedGen UID:
343052
Concept ID:
C1854114
Finding
Distance from nasion to subnasale more than two standard deviations below the mean, or alternatively, an apparently decreased length from the nasal root to the nasal tip.
Low posterior hairline
MedGen UID:
383755
Concept ID:
C1855728
Finding
Hair on the neck extends more inferiorly than usual.
Abnormally large globe
MedGen UID:
344595
Concept ID:
C1855852
Finding
Diffusely large eye (with megalocornea) without glaucoma.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVChromosome 3q29 microduplication syndrome
Follow this link to review classifications for Chromosome 3q29 microduplication syndrome in Orphanet.

Recent clinical studies

Diagnosis

Coyan AG, Dyer LM
Eur J Med Genet 2020 Dec;63(12):104083. Epub 2020 Oct 9 doi: 10.1016/j.ejmg.2020.104083. PMID: 33039685
Guida V, Sinibaldi L, Pagnoni M, Bernardini L, Loddo S, Margiotti K, Digilio MC, Fadda MT, Dallapiccola B, Iannetti G, Alessandro de L
Am J Med Genet A 2015 Apr;167A(4):797-801. Epub 2015 Mar 3 doi: 10.1002/ajmg.a.36951. PMID: 25735547
Fernández-Jaén A, Castellanos Mdel C, Fernández-Perrone AL, Fernández-Mayoralas DM, de la Vega AG, Calleja-Pérez B, Fernández EC, Albert J, Hombre MC
Am J Med Genet A 2014 Aug;164A(8):2043-7. Epub 2014 May 16 doi: 10.1002/ajmg.a.36559. PMID: 24838842
McGoey R, Varma A, Lacassie Y
Am J Med Genet A 2010 Dec;152A(12):3068-73. doi: 10.1002/ajmg.a.33721. PMID: 21108391
Lisi EC, Hamosh A, Doheny KF, Squibb E, Jackson B, Galczynski R, Thomas GH, Batista DA
Am J Med Genet A 2008 Mar 1;146A(5):601-9. doi: 10.1002/ajmg.a.32190. PMID: 18241066

Prognosis

Bauleo A, Pace V, Montesanto A, De Stefano L, Brando R, Puntorieri D, Cento L, Genuardi M, Falcone E
Mol Genet Genomic Med 2023 Apr;11(4):e2130. Epub 2023 Jan 24 doi: 10.1002/mgg3.2130. PMID: 36691815Free PMC Article

Clinical prediction guides

Bauleo A, Pace V, Montesanto A, De Stefano L, Brando R, Puntorieri D, Cento L, Genuardi M, Falcone E
Mol Genet Genomic Med 2023 Apr;11(4):e2130. Epub 2023 Jan 24 doi: 10.1002/mgg3.2130. PMID: 36691815Free PMC Article
Guida V, Sinibaldi L, Pagnoni M, Bernardini L, Loddo S, Margiotti K, Digilio MC, Fadda MT, Dallapiccola B, Iannetti G, Alessandro de L
Am J Med Genet A 2015 Apr;167A(4):797-801. Epub 2015 Mar 3 doi: 10.1002/ajmg.a.36951. PMID: 25735547

Supplemental Content

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...