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Seckel syndrome 2(SCKL2)

MedGen UID:
338264
Concept ID:
C1847572
Disease or Syndrome
Synonyms: MICROCEPHALIC PRIMORDIAL DWARFISM 2; SCKL2; SECKEL-TYPE DWARFISM 2
 
Gene (location): RBBP8 (18q11.2)
 
Monarch Initiative: MONDO:0011715
OMIM®: 606744

Definition

Seckel syndrome is a rare autosomal recessive disorder characterized by growth retardation, microcephaly with mental retardation, and a characteristic facial appearance (Borglum et al., 2001). For a general phenotypic description and a discussion of genetic heterogeneity of Seckel syndrome, see SCKL1 (210600). [from OMIM]

Clinical features

From HPO
Ectopic kidney
MedGen UID:
68661
Concept ID:
C0238207
Congenital Abnormality
A developmental defect in which a kidney is located in an abnormal anatomic position.
Hypospadias
MedGen UID:
163083
Concept ID:
C0848558
Congenital Abnormality
Abnormal position of urethral meatus on the ventral penile shaft (underside) characterized by displacement of the urethral meatus from the tip of the glans penis to the ventral surface of the penis, scrotum, or perineum.
Clinodactyly of the 5th finger
MedGen UID:
340456
Concept ID:
C1850049
Congenital Abnormality
Clinodactyly refers to a bending or curvature of the fifth finger in the radial direction (i.e., towards the 4th finger).
Heart murmur
MedGen UID:
9171
Concept ID:
C0018808
Finding
An extra or unusual sound heard during a heartbeat caused vibrations resulting from the flow of blood through the heart.
Small for gestational age
MedGen UID:
65920
Concept ID:
C0235991
Finding
Smaller than normal size according to sex and gestational age related norms, defined as a weight below the 10th percentile for the 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.
Abnormally high-pitched voice
MedGen UID:
66836
Concept ID:
C0241703
Finding
A persistent (minutes to hours) abnormal increase in the pitch (frequency) of the voice for the context or social situation or significantly different from baseline of the individual.
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.
Mild global developmental delay
MedGen UID:
861405
Concept ID:
C4012968
Finding
A mild delay in the achievement of motor or mental milestones in the domains of development of a child.
Micrognathia
MedGen UID:
44428
Concept ID:
C0025990
Congenital Abnormality
Developmental hypoplasia of the mandible.
Basal ganglia calcification
MedGen UID:
234651
Concept ID:
C1389280
Pathologic Function
The presence of calcium deposition affecting one or more structures of the basal ganglia.
Cerebellar calcifications
MedGen UID:
338697
Concept ID:
C1851431
Finding
Primary microcephaly
MedGen UID:
383046
Concept ID:
C2677180
Finding
Head circumference below 2 standard deviations below the mean for age and gender at birth.
Microcephaly
MedGen UID:
1644158
Concept ID:
C4551563
Finding
Head circumference below 2 standard deviations below the mean for age and gender.
Microglossia
MedGen UID:
10029
Concept ID:
C0025988
Congenital Abnormality
Decreased length and width of the tongue.
Microdontia
MedGen UID:
66008
Concept ID:
C0240340
Congenital Abnormality
Decreased size of the teeth, which can be defined as a mesiodistal tooth diameter (width) more than 2 SD below mean. Alternatively, an apparently decreased maximum width of tooth.
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.
Narrow forehead
MedGen UID:
326956
Concept ID:
C1839758
Finding
Width of the forehead or distance between the frontotemporales is more than two standard deviations below the mean (objective); or apparently narrow intertemporal region (subjective).
Few cafe-au-lait spots
MedGen UID:
870435
Concept ID:
C4024881
Finding
The presence of two to five cafe-au-lait macules.
Microphthalmia
MedGen UID:
10033
Concept ID:
C0026010
Congenital Abnormality
Microphthalmia is an eye abnormality that arises before birth. In this condition, one or both eyeballs are abnormally small. In some affected individuals, the eyeball may appear to be completely missing; however, even in these cases some remaining eye tissue is generally present. Such severe microphthalmia should be distinguished from another condition called anophthalmia, in which no eyeball forms at all. However, the terms anophthalmia and severe microphthalmia are often used interchangeably. Microphthalmia may or may not result in significant vision loss.\n\nPeople with microphthalmia may also have a condition called coloboma. Colobomas are missing pieces of tissue in structures that form the eye. They may appear as notches or gaps in the colored part of the eye called the iris; the retina, which is the specialized light-sensitive tissue that lines the back of the eye; the blood vessel layer under the retina called the choroid; or in the optic nerves, which carry information from the eyes to the brain. Colobomas may be present in one or both eyes and, depending on their size and location, can affect a person's vision.\n\nPeople with microphthalmia may also have other eye abnormalities, including clouding of the lens of the eye (cataract) and a narrowed opening of the eye (narrowed palpebral fissure). Additionally, affected individuals may have an abnormality called microcornea, in which the clear front covering of the eye (cornea) is small and abnormally curved.\n\nBetween one-third and one-half of affected individuals have microphthalmia as part of a syndrome that affects other organs and tissues in the body. These forms of the condition are described as syndromic. When microphthalmia occurs by itself, it is described as nonsyndromic or isolated.

Recent clinical studies

Etiology

Monteiro A, Cortez GM, Granja MF, Agnoletto GJ, Kranich J, Padilha MVR, Aldana P, Hanel R
J Neurointerv Surg 2021 Feb;13(2):171-176. Epub 2020 Jun 10 doi: 10.1136/neurintsurg-2020-016069. PMID: 32522788
Dinçer T, Yorgancıoğlu-Budak G, Ölmez A, Er İ, Dodurga Y, Özdemir ÖM, Toraman B, Yıldırım A, Sabir N, Akarsu NA, Semerci CN, Kalay E
Eur J Hum Genet 2017 Oct;25(10):1118-1125. Epub 2017 Aug 23 doi: 10.1038/ejhg.2017.120. PMID: 28832566Free PMC Article
Rauch A
Best Pract Res Clin Endocrinol Metab 2011 Feb;25(1):125-30. doi: 10.1016/j.beem.2010.10.015. PMID: 21396579
Willems M, Geneviève D, Borck G, Baumann C, Baujat G, Bieth E, Edery P, Farra C, Gerard M, Héron D, Leheup B, Le Merrer M, Lyonnet S, Martin-Coignard D, Mathieu M, Thauvin-Robinet C, Verloes A, Colleaux L, Munnich A, Cormier-Daire V
J Med Genet 2010 Dec;47(12):797-802. Epub 2009 Jul 29 doi: 10.1136/jmg.2009.067298. PMID: 19643772

Diagnosis

Jung M, Rai A, Wang L, Puttmann K, Kukreja K, Koh CJ
Urology 2018 Oct;120:241-243. Epub 2018 Jun 9 doi: 10.1016/j.urology.2018.05.023. PMID: 29894776
Kumar KV, Aravinda K
Endocr Pract 2012 May-Jun;18(3):427. doi: 10.4158/EP11385VV. PMID: 22592053
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
Willems M, Geneviève D, Borck G, Baumann C, Baujat G, Bieth E, Edery P, Farra C, Gerard M, Héron D, Leheup B, Le Merrer M, Lyonnet S, Martin-Coignard D, Mathieu M, Thauvin-Robinet C, Verloes A, Colleaux L, Munnich A, Cormier-Daire V
J Med Genet 2010 Dec;47(12):797-802. Epub 2009 Jul 29 doi: 10.1136/jmg.2009.067298. PMID: 19643772

Prognosis

Willems M, Geneviève D, Borck G, Baumann C, Baujat G, Bieth E, Edery P, Farra C, Gerard M, Héron D, Leheup B, Le Merrer M, Lyonnet S, Martin-Coignard D, Mathieu M, Thauvin-Robinet C, Verloes A, Colleaux L, Munnich A, Cormier-Daire V
J Med Genet 2010 Dec;47(12):797-802. Epub 2009 Jul 29 doi: 10.1136/jmg.2009.067298. PMID: 19643772

Clinical prediction guides

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
Willems M, Geneviève D, Borck G, Baumann C, Baujat G, Bieth E, Edery P, Farra C, Gerard M, Héron D, Leheup B, Le Merrer M, Lyonnet S, Martin-Coignard D, Mathieu M, Thauvin-Robinet C, Verloes A, Colleaux L, Munnich A, Cormier-Daire V
J Med Genet 2010 Dec;47(12):797-802. Epub 2009 Jul 29 doi: 10.1136/jmg.2009.067298. PMID: 19643772

Recent systematic reviews

Monteiro A, Cortez GM, Granja MF, Agnoletto GJ, Kranich J, Padilha MVR, Aldana P, Hanel R
J Neurointerv Surg 2021 Feb;13(2):171-176. Epub 2020 Jun 10 doi: 10.1136/neurintsurg-2020-016069. PMID: 32522788

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