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Mulibrey nanism syndrome(MUL)

MedGen UID:
99347
Concept ID:
C0524582
Disease or Syndrome
Synonyms: MUL; Mulibrey Nanism; Muscle-liver-brain-eye nanism; Perheentupa syndrome; Pericardial constriction and growth failure
SNOMED CT: Mulibrey nanism syndrome (81604003); Perheentupa syndrome (81604003); Muscle, liver, brain, eye nanism syndrome (81604003)
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): TRIM37 (17q22)
 
Monarch Initiative: MONDO:0009664
OMIM®: 253250
Orphanet: ORPHA2576

Definition

Mulibrey nanism (MUL) is a rare autosomal recessive growth disorder with prenatal onset, including occasional progressive cardiomyopathy, characteristic facial features, failure of sexual maturation, insulin resistance with type 2 diabetes, and an increased risk for Wilms tumor (summary by Hamalainen et al., 2006). [from OMIM]

Clinical features

From HPO
Nephroblastoma
MedGen UID:
10221
Concept ID:
C0027708
Neoplastic Process
The presence of a nephroblastoma, which is a neoplasm of the kidney that primarily affects children.
Single transverse palmar crease
MedGen UID:
96108
Concept ID:
C0424731
Finding
The distal and proximal transverse palmar creases are merged into a single transverse palmar crease.
Cardiomegaly
MedGen UID:
5459
Concept ID:
C0018800
Finding
Increased size of the heart, clinically defined as an increased transverse diameter of the cardiac silhouette that is greater than or equal to 50% of the transverse diameter of the chest (increased cardiothoracic ratio) on a posterior-anterior projection of a chest radiograph or a computed tomography.
Congestive heart failure
MedGen UID:
9169
Concept ID:
C0018802
Disease or Syndrome
The presence of an abnormality of cardiac function that is responsible for the failure of the heart to pump blood at a rate that is commensurate with the needs of the tissues or a state in which abnormally elevated filling pressures are required for the heart to do so. Heart failure is frequently related to a defect in myocardial contraction.
Myocardial fibrosis
MedGen UID:
56239
Concept ID:
C0151654
Pathologic Function
Myocardial fibrosis is characterized by dysregulated collagen turnover (increased synthesis predominates over unchanged or decreased degradation) and excessive diffuse collagen accumulation in the interstitial and perivascular spaces as well as by phenotypically transformed fibroblasts, termed myofibroblasts.
Pericardial constriction
MedGen UID:
116108
Concept ID:
C0240709
Finding
Compression of the heart caused by rigid, thickened, or fused pericardial membranes.
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.
Short stature
MedGen UID:
87607
Concept ID:
C0349588
Finding
A height below that which is expected according to age and gender norms. Although there is no universally accepted definition of short stature, many refer to "short stature" as height more than 2 standard deviations below the mean for age and gender (or below the 3rd percentile for age and gender dependent norms).
Growth delay
MedGen UID:
99124
Concept ID:
C0456070
Pathologic Function
A deficiency or slowing down of growth pre- and postnatally.
Ascites
MedGen UID:
416
Concept ID:
C0003962
Disease or Syndrome
Accumulation of fluid in the peritoneal cavity.
Hepatomegaly
MedGen UID:
42428
Concept ID:
C0019209
Finding
Abnormally increased size of the liver.
Dysarthria
MedGen UID:
8510
Concept ID:
C0013362
Mental or Behavioral Dysfunction
Dysarthric speech is a general description referring to a neurological speech disorder characterized by poor articulation. Depending on the involved neurological structures, dysarthria may be further classified as spastic, flaccid, ataxic, hyperkinetic and hypokinetic, or mixed.
Intellectual disability, mild
MedGen UID:
10044
Concept ID:
C0026106
Mental or Behavioral Dysfunction
Mild intellectual disability is defined as an intelligence quotient (IQ) in the range of 50-69.
Ventriculomegaly
MedGen UID:
480553
Concept ID:
C3278923
Finding
An increase in size of the ventricular system of the brain.
Hypotonia
MedGen UID:
10133
Concept ID:
C0026827
Finding
Hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle). Even when relaxed, muscles have a continuous and passive partial contraction which provides some resistance to passive stretching. Hypotonia thus manifests as diminished resistance to passive stretching. Hypotonia is not the same as muscle weakness, although the two conditions can co-exist.
Frontal bossing
MedGen UID:
67453
Concept ID:
C0221354
Congenital Abnormality
Bilateral bulging of the lateral frontal bone prominences with relative sparing of the midline.
Dolichocephaly
MedGen UID:
65142
Concept ID:
C0221358
Congenital Abnormality
An abnormality of skull shape characterized by a increased anterior-posterior diameter, i.e., an increased antero-posterior dimension of the skull. Cephalic index less than 76%. Alternatively, an apparently increased antero-posterior length of the head compared to width. Often due to premature closure of the sagittal suture.
Thickened cortex of long bones
MedGen UID:
333557
Concept ID:
C1840418
Finding
Abnormal thickening of the cortex of long bones.
J-shaped sella turcica
MedGen UID:
381480
Concept ID:
C1854718
Finding
A deformity of the sella turcica whereby the sella extends further anterior than normal such that the anterior clinoid process appears to overhang it, giving the appearance of the letter J on imaging of the skull.
Absent frontal sinuses
MedGen UID:
343405
Concept ID:
C1855669
Finding
Aplasia of frontal sinus.
Hypoplastic frontal sinuses
MedGen UID:
349225
Concept ID:
C1859682
Finding
Underdevelopment of frontal sinus.
Recurrent lower respiratory tract infections
MedGen UID:
756211
Concept ID:
C3163798
Disease or Syndrome
An increased susceptibility to lower respiratory tract infections as manifested by a history of recurrent lower respiratory tract infections.
Weak voice
MedGen UID:
66033
Concept ID:
C0241700
Finding
Reduced intensity (volume) of speech.
High pitched voice
MedGen UID:
66836
Concept ID:
C0241703
Finding
An abnormal increase in the pitch (frequency) of the voice.
Enamel hypoplasia
MedGen UID:
3730
Concept ID:
C0011351
Disease or Syndrome
Developmental hypoplasia of the dental enamel.
Partial congenital absence of teeth
MedGen UID:
43794
Concept ID:
C0020608
Congenital Abnormality
Tooth agenesis in some form is a common human anomaly that affects approximately 20% of the population. Although tooth agenesis is associated with numerous syndromes, several case reports describe nonsyndromic forms that are either sporadic or familial in nature, as reviewed by Gorlin et al. (1990). The incidence of familial tooth agenesis varies with each class of teeth. Most commonly affected are third molars (wisdom teeth), followed by either upper lateral incisors or lower second premolars; agenesis involving first and second molars is very rare. Also see 114600 and 302400. Selective tooth agenesis without associated systemic disorders has sometimes been divided into 2 types: oligodontia, defined as agenesis of 6 or more permanent teeth, and hypodontia, defined as agenesis of less than 6 teeth. The number in both cases does not include absence of third molars (wisdom teeth). Faulty use of the terms, however, have confounded their use. The term 'partial anodontia' is obsolete (Salinas, 1978). Genetic Heterogeneity of Selective Tooth Agenesis Other forms of selective tooth agenesis include STHAG2 (602639), mapped to chromosome 16q12; STHAG3 (604625), caused by mutation in the PAX9 gene (167416) on chromosome 14q12; STHAG4 (150400), caused by mutation in the WNT10A gene (606268) on chromosome 2q35; STHAG5 (610926), mapped to chromosome 10q11; STHAG7 (616724), caused by mutation in the LRP6 gene (603507) on chromosome 12p13; STHAG8 (617073), caused by mutation in the WNT10B gene (601906) on chromosome 12q13; STHAG9 (617275), caused by mutation in the GREM2 gene (608832) on chromosome 1q43; and STHAGX1 (313500), caused by mutation in the EDA gene (300451) on chromosome Xq13. A type of selective tooth agenesis that was formerly designated STHAG6 has been incorporated into the dental anomalies and short stature syndrome (DASS; 601216). Of 34 unrelated patients with nonsyndromic tooth agenesis, van den Boogaard et al. (2012) found that 56% (19 patients) had mutations in the WNT10A gene (STHAG4), whereas only 3% and 9% had mutations in the MSX1 (STHAG1) and PAX9 (STHAG3) genes, respectively. The authors concluded that WNT10A is a major gene in the etiology of isolated hypodontia. Genotype-Phenotype Correlations Yu et al. (2016) observed that the most frequently missing permanent teeth in WNT10B-associated oligodontia were the lateral incisors (83.3%), whereas premolars were missing only 51.4% of the time, which they noted was a pattern 'clearly different' from the oligodontia patterns resulting from WNT10A mutations. They also stated that the selective pattern in WNT10B mutants was different from that associated with mutations in other genes, such as MSX1, in which second premolars are missing, and PAX9, in which there is agenesis of molars.
Dental malocclusion
MedGen UID:
9869
Concept ID:
C0024636
Anatomical Abnormality
Dental malocclusion refers to an abnormality of the occlusion, or alignment, of the teeth and the way the upper and lower teeth fit together, resulting in overcrowding of teeth or in abnormal bite patterns.
Microglossia
MedGen UID:
10029
Concept ID:
C0025988
Congenital Abnormality
Decreased length and width of the tongue.
Dental crowding
MedGen UID:
11850
Concept ID:
C0040433
Finding
Changes in alignment of teeth in the dental arch
Wide nose
MedGen UID:
140869
Concept ID:
C0426421
Finding
Interalar distance more than two standard deviations above the mean for age, i.e., an apparently increased width of the nasal base and alae.
Triangular face
MedGen UID:
324383
Concept ID:
C1835884
Finding
Facial contour, as viewed from the front, triangular in shape, with breadth at the temples and tapering to a narrow chin.
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).
Nevus flammeus
MedGen UID:
65911
Concept ID:
C0235752
Congenital Abnormality
A congenital vascular malformation consisting of superficial and deep dilated capillaries in the skin which produce a reddish to purplish discolouration of the skin.
Hydrops fetalis
MedGen UID:
6947
Concept ID:
C0020305
Disease or Syndrome
The abnormal accumulation of fluid in two or more fetal compartments, including ascites, pleural effusion, pericardial effusion, and skin edema.
Astigmatism
MedGen UID:
2473
Concept ID:
C0004106
Disease or Syndrome
Astigmatism (from the Greek 'a' meaning absence and 'stigma' meaning point) is a condition in which the parallel rays of light entering the eye through the refractive media are not focused on a single point. Both corneal and noncorneal factors contribute to refractive astigmatism. Corneal astigmatism is mainly the result of an aspheric anterior surface of the cornea, which can be measured readily by means of a keratometer; in a small fraction of cases (approximately 1 in 10) the effect is neutralized by the back surface. The curvature of the back surface of the cornea is not considered in most studies, because it is more difficult to measure; moreover, in the case of severe corneal astigmatism, there is evidence that both surfaces have the same configuration. Noncorneal factors are errors in the curvature of the 2 surfaces of the crystalline lens, irregularity in the refractive index of the lens, and an eccentric lens position. Since the cornea is the dominant component of the eye's refracting system, a highly astigmatic cornea is likely to result in a similarly astigmatic ocular refraction (summary by Clementi et al., 1998).
Corneal dystrophy
MedGen UID:
3619
Concept ID:
C0010036
Disease or Syndrome
The term corneal dystrophy embraces a heterogenous group of bilateral genetically determined non-inflammatory corneal diseases that are restricted to the cornea.
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 (145410), Greig cephalopolysyndactyly (175700), and Noonan syndrome (163950) (summary by Cohen et al., 1995).
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.
Iris coloboma
MedGen UID:
116097
Concept ID:
C0240063
Anatomical Abnormality
A coloboma of the iris.
Pigmentary retinopathy
MedGen UID:
1643295
Concept ID:
C4551715
Disease or Syndrome
An abnormality of the retina characterized by pigment deposition. It is typically associated with migration and proliferation of macrophages or retinal pigment epithelial cells into the retina; melanin from these cells causes the pigmentary changes. Pigmentary retinopathy is a common final pathway of many retinal conditions and is often associated with visual loss.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVMulibrey nanism syndrome
Follow this link to review classifications for Mulibrey nanism syndrome in Orphanet.

Recent clinical studies

Etiology

Anwer M, Bin Mahmood SU, Stawiarski K, Elder R, Ali A, Jacoby D
Ann Thorac Surg 2020 Feb;109(2):e115-e117. Epub 2019 Jun 28 doi: 10.1016/j.athoracsur.2019.05.021. PMID: 31260650

Diagnosis

Anwer M, Bin Mahmood SU, Stawiarski K, Elder R, Ali A, Jacoby D
Ann Thorac Surg 2020 Feb;109(2):e115-e117. Epub 2019 Jun 28 doi: 10.1016/j.athoracsur.2019.05.021. PMID: 31260650

Therapy

Cordova Sanchez A, Vasigh M, Carhart R
J Investig Med High Impact Case Rep 2022 Jan-Dec;10:23247096221077816. doi: 10.1177/23247096221077816. PMID: 35257621Free PMC Article

Prognosis

Anwer M, Bin Mahmood SU, Stawiarski K, Elder R, Ali A, Jacoby D
Ann Thorac Surg 2020 Feb;109(2):e115-e117. Epub 2019 Jun 28 doi: 10.1016/j.athoracsur.2019.05.021. PMID: 31260650

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