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Lethal congenital contracture syndrome 8(LCCS8)

MedGen UID:
896058
Concept ID:
C4225385
Disease or Syndrome
Synonym: LCCS8
 
Gene (location): ADCY6 (12q13.12)
 
Monarch Initiative: MONDO:0014570
OMIM®: 616287

Definition

Lethal congenital contracture syndrome-8 (LCCS8), an axoglial form of arthrogryposis multiplex congenita, is characterized by congenital distal joint contractures, reduced fetal movements, and severe motor paralysis leading to death early in the neonatal period (Laquerriere et al., 2014). For a general phenotypic description and a discussion of genetic heterogeneity of lethal congenital contracture syndrome, see LCCS1 (253310). [from OMIM]

Clinical features

From HPO
Pes cavus
MedGen UID:
675590
Concept ID:
C0728829
Congenital Abnormality
An increase in height of the medial longitudinal arch of the foot that does not flatten on weight bearing (i.e., a distinctly hollow form of the sole of the foot when it is bearing weight).
Hammertoe
MedGen UID:
209712
Concept ID:
C1136179
Anatomical Abnormality
Hyperextension of the metatarsal-phalangeal joint with hyperflexion of the proximal interphalangeal (PIP) joint.
Feeding difficulties
MedGen UID:
65429
Concept ID:
C0232466
Finding
Impaired ability to eat related to problems gathering food and getting ready to suck, chew, or swallow it.
Oral-pharyngeal dysphagia
MedGen UID:
120596
Concept ID:
C0267071
Disease or Syndrome
Difficulty in swallowing due to an abnormality in the mouth or throat.
Areflexia
MedGen UID:
115943
Concept ID:
C0234146
Finding
Absence of neurologic reflexes such as the knee-jerk reaction.
Distal sensory impairment
MedGen UID:
335722
Concept ID:
C1847584
Finding
An abnormal reduction in sensation in the distal portions of the extremities.
Peripheral hypomyelination
MedGen UID:
870480
Concept ID:
C4024927
Finding
Reduced amount of myelin in the nervous system resulting from defective myelinogenesis in the peripheral nervous system.
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.
Distal arthrogryposis
MedGen UID:
120512
Concept ID:
C0265213
Disease or Syndrome
An inherited primary limb malformation disorder characterized by congenital contractures of two or more different body areas and without primary neurologic and/or muscle disease that affects limb function.
Flexion contracture
MedGen UID:
83069
Concept ID:
C0333068
Anatomical Abnormality
A flexion contracture is a bent (flexed) joint that cannot be straightened actively or passively. It is thus a chronic loss of joint motion due to structural changes in muscle, tendons, ligaments, or skin that prevents normal movement of joints.
Facial diplegia
MedGen UID:
322796
Concept ID:
C1836003
Finding
Facial diplegia refers to bilateral facial palsy (bilateral facial palsy is much rarer than unilateral facial palsy).
Distal amyotrophy
MedGen UID:
338530
Concept ID:
C1848736
Disease or Syndrome
Muscular atrophy affecting muscles in the distal portions of the extremities.
Vocal cord paralysis
MedGen UID:
53047
Concept ID:
C0042928
Disease or Syndrome
A loss of the ability to move the vocal folds.
Polyhydramnios
MedGen UID:
6936
Concept ID:
C0020224
Pathologic Function
The presence of excess amniotic fluid in the uterus during pregnancy.
Decreased fetal movement
MedGen UID:
68618
Concept ID:
C0235659
Finding
An abnormal reduction in quantity or strength of fetal movements.

Recent clinical studies

Etiology

Conant A, Curiel J, Pizzino A, Sabetrasekh P, Murphy J, Bloom M, Evans SH, Helman G, Taft RJ, Simons C, Whitehead MT, Moore SA, Vanderver A
J Child Neurol 2018 Sep;33(10):642-650. Epub 2018 Jun 8 doi: 10.1177/0883073818776157. PMID: 29882456Free PMC Article
Narkis G, Ofir R, Landau D, Manor E, Volokita M, Hershkowitz R, Elbedour K, Birk OS
Am J Hum Genet 2007 Sep;81(3):530-9. Epub 2007 Jul 24 doi: 10.1086/520771. PMID: 17701898Free PMC Article

Diagnosis

Cerino M, Di Meglio C, Albertini F, Audic F, Riccardi F, Boulay C, Philip N, Bartoli M, Lévy N, Krahn M, Chabrol B
Mol Genet Genomic Med 2020 Aug;8(8):e1277. Epub 2020 Jun 14 doi: 10.1002/mgg3.1277. PMID: 32537934Free PMC Article
Ekhilevitch N, Kurolap A, Oz-Levi D, Mory A, Hershkovitz T, Ast G, Mandel H, Baris HN
Clin Genet 2016 Jul;90(1):84-9. Epub 2016 Jan 20 doi: 10.1111/cge.12707. PMID: 26661508
Navarro CL, Esteves-Vieira V, Courrier S, Boyer A, Duong Nguyen T, Huong le TT, Meinke P, Schröder W, Cormier-Daire V, Sznajer Y, Amor DJ, Lagerstedt K, Biervliet M, van den Akker PC, Cau P, Roll P, Lévy N, Badens C, Wehnert M, De Sandre-Giovannoli A
Eur J Hum Genet 2014 Aug;22(8):1002-11. Epub 2013 Oct 30 doi: 10.1038/ejhg.2013.258. PMID: 24169522Free PMC Article

Prognosis

Agolini E, Cherchi C, Bellacchio E, Martinelli D, Cocciadiferro D, Cutrera R, Chiarini Testa MB, Barone C, Bianca S, Novelli A
Clin Genet 2020 Apr;97(4):649-654. Epub 2020 Feb 20 doi: 10.1111/cge.13691. PMID: 31846058
Bidier M, Salz M, Meyburg J, Elbe-Bürger A, Lasitzschka F, Hausser I, Schäkel K
Acta Derm Venereol 2018 Aug 29;98(8):807-808. doi: 10.2340/00015555-2970. PMID: 29774364
Stevens CA, Lachman RS
Am J Med Genet A 2010 Aug;152A(8):1915-8. doi: 10.1002/ajmg.a.33488. PMID: 20602491Free PMC Article

Clinical prediction guides

Agolini E, Cherchi C, Bellacchio E, Martinelli D, Cocciadiferro D, Cutrera R, Chiarini Testa MB, Barone C, Bianca S, Novelli A
Clin Genet 2020 Apr;97(4):649-654. Epub 2020 Feb 20 doi: 10.1111/cge.13691. PMID: 31846058
Ekhilevitch N, Kurolap A, Oz-Levi D, Mory A, Hershkovitz T, Ast G, Mandel H, Baris HN
Clin Genet 2016 Jul;90(1):84-9. Epub 2016 Jan 20 doi: 10.1111/cge.12707. PMID: 26661508

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