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Lamb-Shaffer syndrome(LAMSHF)

MedGen UID:
903542
Concept ID:
C4225202
Disease or Syndrome
Synonyms: LAMB-SHAFFER SYNDROME; LAMSHF
SNOMED CT: SOX5 haploinsufficiency syndrome (1251453008); Lamb Shaffer syndrome (1251453008)
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.
 
Gene (location): SOX5 (12p12.1)
 
Monarch Initiative: MONDO:0014778
OMIM®: 616803
Orphanet: ORPHA530983

Definition

Lamb-Shaffer syndrome is a neurodevelopmental disorder characterized by global developmental delay, intellectual disability, poor expressive speech, and mild dysmorphic facial features. Additional variable skeletal abnormalities may also be present (summary by Nesbitt et al., 2015). [from OMIM]

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.
Overlapping toe
MedGen UID:
182531
Concept ID:
C0920299
Anatomical Abnormality
Describes a foot digit resting on the dorsal surface of an adjacent digit when the foot is at rest. Initially clawing may be dynamic and only noticeable on walking. Over time the plantar plate tears, subluxation occurs at the metatarsophalangeal joint (MTPJ), and the deformity becomes permanent.
Long fingers
MedGen UID:
346836
Concept ID:
C1858091
Finding
The middle finger is more than 2 SD above the mean for newborns 27 to 41 weeks EGA or above the 97th centile for children from birth to 16 years of age AND the five digits retain their normal length proportions relative to each other (i.e., it is not the case that the middle finger is the only lengthened digit), or, Fingers that appear disproportionately long compared to the palm of the hand.
Long hallux
MedGen UID:
400514
Concept ID:
C1864375
Finding
Increased length of the big toe.
Clinodactyly
MedGen UID:
1644094
Concept ID:
C4551485
Congenital Abnormality
An angulation of a digit at an interphalangeal joint in the plane of the palm (finger) or sole (toe).
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.
Posteriorly rotated ears
MedGen UID:
96566
Concept ID:
C0431478
Congenital Abnormality
A type of abnormal location of the ears in which the position of the ears is characterized by posterior rotation (the superior part of the ears is rotated towards the back of the head, and the inferior part of the ears towards the front).
Anxiety
MedGen UID:
1613
Concept ID:
C0003467
Finding
Intense feelings of nervousness, tension, or panic often arise in response to interpersonal stresses. There is worry about the negative effects of past unpleasant experiences and future negative possibilities. Individuals may feel fearful, apprehensive, or threatened by uncertainty, and they may also have fears of falling apart or losing control.
Delayed speech and language development
MedGen UID:
105318
Concept ID:
C0454644
Finding
A degree of language development that is significantly below the norm for a child of a specified age.
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.
Scoliosis
MedGen UID:
11348
Concept ID:
C0036439
Disease or Syndrome
The presence of an abnormal lateral curvature of the spine.
Pectus carinatum
MedGen UID:
57643
Concept ID:
C0158731
Finding
A deformity of the chest caused by overgrowth of the ribs and characterized by protrusion of the sternum.
Frontal bossing
MedGen UID:
67453
Concept ID:
C0221354
Congenital Abnormality
Bilateral bulging of the lateral frontal bone prominences with relative sparing of the midline.
Vertebral clefting
MedGen UID:
344586
Concept ID:
C1855828
Finding
Schisis (cleft or cleavage) of vertebral bodies.
Generalized hypotonia
MedGen UID:
346841
Concept ID:
C1858120
Finding
Generalized muscular hypotonia (abnormally low muscle tone).
Dental crowding
MedGen UID:
11850
Concept ID:
C0040433
Finding
Changes in alignment of teeth in the dental arch
Open mouth
MedGen UID:
116104
Concept ID:
C0240379
Finding
A facial appearance characterized by a permanently or nearly permanently opened mouth.
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.
Epicanthus
MedGen UID:
151862
Concept ID:
C0678230
Congenital Abnormality
Epicanthus is a condition in which a fold of skin stretches from the upper to the lower eyelid, partially covering the inner canthus. Usher (1935) noted that epicanthus is a normal finding in the fetus of all races. Epicanthus also occurs in association with hereditary ptosis (110100).
Facial asymmetry
MedGen UID:
266298
Concept ID:
C1306710
Finding
An abnormal difference between the left and right sides of the face.
Depressed nasal bridge
MedGen UID:
373112
Concept ID:
C1836542
Finding
Posterior positioning of the nasal root in relation to the overall facial profile for age.
Wide nasal bridge
MedGen UID:
341441
Concept ID:
C1849367
Finding
Increased breadth of the nasal bridge (and with it, the nasal root).
Myopia
MedGen UID:
44558
Concept ID:
C0027092
Disease or Syndrome
Nearsightedness, also known as myopia, is an eye condition that causes blurry distance vision. People who are nearsighted have more trouble seeing things that are far away (such as when driving) than things that are close up (such as when reading or using a computer). If it is not treated with corrective lenses or surgery, nearsightedness can lead to squinting, eyestrain, headaches, and significant visual impairment.\n\nNearsightedness usually begins in childhood or adolescence. It tends to worsen with age until adulthood, when it may stop getting worse (stabilize). In some people, nearsightedness improves in later adulthood.\n\nFor normal vision, light passes through the clear cornea at the front of the eye and is focused by the lens onto the surface of the retina, which is the lining of the back of the eye that contains light-sensing cells. People who are nearsighted typically have eyeballs that are too long from front to back. As a result, light entering the eye is focused too far forward, in front of the retina instead of on its surface. It is this change that causes distant objects to appear blurry. The longer the eyeball is, the farther forward light rays will be focused and the more severely nearsighted a person will be.\n\nNearsightedness is measured by how powerful a lens must be to correct it. The standard unit of lens power is called a diopter. Negative (minus) powered lenses are used to correct nearsightedness. The more severe a person's nearsightedness, the larger the number of diopters required for correction. In an individual with nearsightedness, one eye may be more nearsighted than the other.\n\nEye doctors often refer to nearsightedness less than -5 or -6 diopters as "common myopia." Nearsightedness of -6 diopters or more is commonly called "high myopia." This distinction is important because high myopia increases a person's risk of developing other eye problems that can lead to permanent vision loss or blindness. These problems include tearing and detachment of the retina, clouding of the lens (cataract), and an eye disease called glaucoma that is usually related to increased pressure within the eye. The risk of these other eye problems increases with the severity of the nearsightedness. The term "pathological myopia" is used to describe cases in which high myopia leads to tissue damage within the eye.
Optic atrophy
MedGen UID:
18180
Concept ID:
C0029124
Disease or Syndrome
Atrophy of the optic nerve. Optic atrophy results from the death of the retinal ganglion cell axons that comprise the optic nerve and manifesting as a pale optic nerve on fundoscopy.
Strabismus
MedGen UID:
21337
Concept ID:
C0038379
Disease or Syndrome
A misalignment of the eyes so that the visual axes deviate from bifoveal fixation. The classification of strabismus may be based on a number of features including the relative position of the eyes, whether the deviation is latent or manifest, intermittent or constant, concomitant or otherwise and according to the age of onset and the relevance of any associated refractive error.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVLamb-Shaffer syndrome

Recent clinical studies

Etiology

Tenorio-Castano J, Gómez ÁS, Coronado M, Rodríguez-Martín P, Parra A, Pascual P, Cazalla M, Gallego N, Arias P, Morales AV, Nevado J, Lapunzina P
Clin Genet 2023 Dec;104(6):637-647. Epub 2023 Sep 13 doi: 10.1111/cge.14423. PMID: 37702321
Zawerton A, Mignot C, Sigafoos A, Blackburn PR, Haseeb A, McWalter K, Ichikawa S, Nava C, Keren B, Charles P, Marey I, Tabet AC, Levy J, Perrin L, Hartmann A, Lesca G, Schluth-Bolard C, Monin P, Dupuis-Girod S, Guillen Sacoto MJ, Schnur RE, Zhu Z, Poisson A, El Chehadeh S, Alembik Y, Bruel AL, Lehalle D, Nambot S, Moutton S, Odent S, Jaillard S, Dubourg C, Hilhorst-Hofstee Y, Barbaro-Dieber T, Ortega L, Bhoj EJ, Masser-Frye D, Bird LM, Lindstrom K, Ramsey KM, Narayanan V, Fassi E, Willing M, Cole T, Salter CG, Akilapa R, Vandersteen A, Canham N, Rump P, Gerkes EH, Klein Wassink-Ruiter JS, Bijlsma E, Hoffer MJV, Vargas M, Wojcik A, Cherik F, Francannet C, Rosenfeld JA, Machol K, Scott DA, Bacino CA, Wang X, Clark GD, Bertoli M, Zwolinski S, Thomas RH, Akay E, Chang RC, Bressi R, Sanchez Russo R, Srour M, Russell L, Goyette AE, Dupuis L, Mendoza-Londono R, Karimov C, Joseph M, Nizon M, Cogné B, Kuechler A, Piton A; Deciphering Developmental Disorder Study, Klee EW, Lefebvre V, Clark KJ, Depienne C
Genet Med 2020 Mar;22(3):524-537. Epub 2019 Oct 3 doi: 10.1038/s41436-019-0657-0. PMID: 31578471Free PMC Article

Diagnosis

Tenorio-Castano J, Gómez ÁS, Coronado M, Rodríguez-Martín P, Parra A, Pascual P, Cazalla M, Gallego N, Arias P, Morales AV, Nevado J, Lapunzina P
Clin Genet 2023 Dec;104(6):637-647. Epub 2023 Sep 13 doi: 10.1111/cge.14423. PMID: 37702321
Edgerley K, Bryson L, Hanington L, Irving R, Joss S, Lampe A, Maystadt I, Osio D, Richardson R, Split M, Sansbury FH, Scurr I, Stewart H, McNeil A, Low K
Am J Med Genet A 2023 May;191(5):1447-1458. Epub 2023 Mar 2 doi: 10.1002/ajmg.a.63124. PMID: 36861937
Mahmud H, Gustainis D, Jackson-Cook C, Couser N
J AAPOS 2023 Jun;27(3):179-182. Epub 2022 Sep 13 doi: 10.1016/j.jaapos.2022.05.011. PMID: 36113698
Zawerton A, Mignot C, Sigafoos A, Blackburn PR, Haseeb A, McWalter K, Ichikawa S, Nava C, Keren B, Charles P, Marey I, Tabet AC, Levy J, Perrin L, Hartmann A, Lesca G, Schluth-Bolard C, Monin P, Dupuis-Girod S, Guillen Sacoto MJ, Schnur RE, Zhu Z, Poisson A, El Chehadeh S, Alembik Y, Bruel AL, Lehalle D, Nambot S, Moutton S, Odent S, Jaillard S, Dubourg C, Hilhorst-Hofstee Y, Barbaro-Dieber T, Ortega L, Bhoj EJ, Masser-Frye D, Bird LM, Lindstrom K, Ramsey KM, Narayanan V, Fassi E, Willing M, Cole T, Salter CG, Akilapa R, Vandersteen A, Canham N, Rump P, Gerkes EH, Klein Wassink-Ruiter JS, Bijlsma E, Hoffer MJV, Vargas M, Wojcik A, Cherik F, Francannet C, Rosenfeld JA, Machol K, Scott DA, Bacino CA, Wang X, Clark GD, Bertoli M, Zwolinski S, Thomas RH, Akay E, Chang RC, Bressi R, Sanchez Russo R, Srour M, Russell L, Goyette AE, Dupuis L, Mendoza-Londono R, Karimov C, Joseph M, Nizon M, Cogné B, Kuechler A, Piton A; Deciphering Developmental Disorder Study, Klee EW, Lefebvre V, Clark KJ, Depienne C
Genet Med 2020 Mar;22(3):524-537. Epub 2019 Oct 3 doi: 10.1038/s41436-019-0657-0. PMID: 31578471Free PMC Article
Fukushi D, Yamada K, Suzuki K, Inaba M, Nomura N, Suzuki Y, Katoh K, Mizuno S, Wakamatsu N
Gene 2018 May 20;655:65-70. Epub 2018 Mar 22 doi: 10.1016/j.gene.2018.02.049. PMID: 29477873

Clinical prediction guides

Edgerley K, Bryson L, Hanington L, Irving R, Joss S, Lampe A, Maystadt I, Osio D, Richardson R, Split M, Sansbury FH, Scurr I, Stewart H, McNeil A, Low K
Am J Med Genet A 2023 May;191(5):1447-1458. Epub 2023 Mar 2 doi: 10.1002/ajmg.a.63124. PMID: 36861937

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