Rothmund–Thomson syndrome

Rothmund-Thomson syndrome
Panel showing some clinical features of the RTS syndrome. A) Chronic phase of cheek poikiloderma (4-year-old girl). B) Poikiloderma with alopecia (21-year-old boy). C) Poikiloderma. D) Poikiloderma sparing the trunk (courtesy of Professor M. Paradisi, Rome). E) Photo distributed poikiloderma and valgism of the knees. F) Thumb aplasia (patient B). G) Bone defect seen by X-Rays: cystic-like destructive lesion of the humerus (distal epiphysis) without apparent solution of continuity of the cortical bone (patient E).
Classification and external resources
Specialty	medical genetics
ICD-10	Q82.8 (ILDS Q82.852)
ICD-9-CM	757.33
OMIM	268400
DiseasesDB	29891
eMedicine	derm/379
MeSH	D011038
GeneReviews	Rothmund-Thomson Syndrome
Orphanet	2909

Rothmund–Thomson syndrome (RTS), also known as poikiloderma atrophicans with cataract or poikiloderma congenitale,^[1]^[2] is a rare autosomal recessive^[3]^[4] skin condition originally described by August von Rothmund (1830–1906) in 1868. Matthew Sydney Thomson (1894–1969) published further descriptions in 1936.^[5]

There have been several reported cases associated with osteosarcoma. A hereditary genetic basis, mutations in the DNA Helicase RECQL4 gene, causing problems during initiation of DNA replication has been implicated in the syndrome ^[1]^[6]^[7]^[8]

Characteristics

Sun-sensitive rash with prominent poikiloderma and telangiectasias
Juvenile cataracts
Saddle nose
Congenital bone defects, including short stature and radial ray anomalies such as absent thumbs
Hair growth problems (absent eyelashes, eyebrows and/or hair)
Hypogonadism has not been well documented
Hypodontia
Calcium problems (not documented in journals)
Ear problems (not documented in journals but identified by patients in support groups)
Produces Osteosarcoma^[9]

The skin is normal at birth. Between 3 to 6 months of age, the affected carrier develops poikiloderma on the cheeks. This characteristic “rash” that all RTS carriers have can develop on the arms, legs and buttocks. “Poikiloderma consists of areas of increased and decreased pigmentation, prominent blood vessels, and thinning of the skin”^[10]

Cause and Genetics

Rothmund–Thomson syndrome has an autosomal recessive pattern of inheritance.

RTS is caused by a mutation of the RECQL4 gene, located at chromosome 8q24.3.^[6]^[11] The disorder is inherited in an autosomal recessive manner.^[3] This means the defective gene responsible for the disorder is located on an autosome (chromosome 8 is an autosome), and two copies of the defective gene (one inherited from each parent) are required in order to be born with the disorder. The parents of an individual with an autosomal recessive disorder both carry one copy of the defective gene, but usually do not experience any signs or symptoms of the disorder.

References

1 2 Online 'Mendelian Inheritance in Man' (OMIM) 268400
↑ James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology (10th ed.). Saunders. p. 576. ISBN 0-7216-2921-0.
1 2 Larizza, L.; Roversi, G.; Volpi, L. (Jan 2010). "Rothmund-Thomson syndrome". Orphanet Journal of Rare Diseases (Free full text) 5: 2. doi:10.1186/1750-1172-5-2. PMC 2826297. PMID 20113479.
↑ Raza N, Malik QU, Hussain Z (2007). "Rothmund-Thomson syndrome: more than just a cosmetic concern". J Coll Physicians Surg Pak. 17 (7): 423–424. PMID 17686357.
↑ Thomson, MS. (Mar 1936). "Poikiloderma Congenitale: Two Cases for Diagnosis.". Proc R Soc Med 29 (5): 453–5. PMID 19990626.
1 2 Larizza L, Magnani I, Roversi G (January 2006). "Rothmund–Thomson syndrome and RECQL4 defect: Splitting and lumping". Cancer Letters 232 (1): 107–120. doi:10.1016/j.canlet.2005.07.042. PMID 16271439.
↑ Hicks MJ, Roth JR, Kozinetz CA, Wang LL (2007). "Clinicopathologic features of osteosarcoma in patients with Rothmund-Thomson syndrome". J. Clin. Oncol. 25 (4): 370–5. doi:10.1200/JCO.2006.08.4558. PMID 17264332.
↑ Sangrithi MN, Bernal JA, Madine M, Philpott A, Lee J, Dunphy WG, Venkitaraman AR (Jun 2005). "Initiation of DNA replication requires the RECQL4 protein mutated in Rothmund-Thomson syndrome". Cell 121 (6): 887–98. doi:10.1016/j.cell.2005.05.015. PMID 15960976.
↑ Wang LL, Levy ML, Lewis RA, et al. (2001). "Clinical manifestations in a cohort of 41 Rothmund-Thomson syndrome patients". Am. J. Med. Genet. 102 (1): 11–17. doi:10.1002/1096-8628(20010722)102:1<11::AID-AJMG1413>3.0.CO;2-A. PMID 11471165.
↑ Understanding RTS pamphlet, RTS Team: Lisa L. Wang (Oncologist), Moise L. Levy (dermatologist), Richard A. Lewis (Ophtalmologist), Sharon E. Plon (Geneticist)
↑ Online 'Mendelian Inheritance in Man' (OMIM) 603780

External links

Rothmund-Thomson on PFOND - web-based service to promote the sharing of information about research, treatment and resources for rare genetic disorders.
GeneReviews/NCBI/NIH/UW entry on Rothmund-Thomson Syndrome
Poikiloderma of Rothmund-Thomson at NIH's Office of Rare Diseases
RTSPlace.org

Congenital malformations and deformations of integument / skin disease (Q80–Q82, 757.0–757.3)

Genodermatosis

Congenital ichthyosis/
erythrokeratodermia

AD	Ichthyosis vulgaris

AR	Congenital ichthyosiform erythroderma: Epidermolytic hyperkeratosis Lamellar ichthyosis Harlequin type ichthyosis Netherton syndrome Zunich–Kaye syndrome Sjögren–Larsson syndrome

XR	X-linked ichthyosis

Ungrouped	Ichthyosis bullosa of Siemens Ichthyosis follicularis Ichthyosis prematurity syndrome Ichthyosis–sclerosing cholangitis syndrome Nonbullous congenital ichthyosiform erythroderma Ichthyosis linearis circumflexa Ichthyosis hystrix

EB
and related

EBS
- EBS-K
- EBS-WC
- EBS-DM
- EBS-OG
- EBS-MD
- EBS-MP

DEB
- DDEB
- RDEB

Ectodermal dysplasia

Elastic/Connective

Hyperkeratosis/
keratinopathy

PPK	diffuse: Diffuse epidermolytic palmoplantar keratoderma Diffuse nonepidermolytic palmoplantar keratoderma Palmoplantar keratoderma of Sybert Mal de Meleda syndromic connexin Bart–Pumphrey syndrome Clouston's hidrotic ectodermal dysplasia Vohwinkel syndrome Corneodermatoosseous syndrome plakoglobin Naxos syndrome Scleroatrophic syndrome of Huriez Olmsted syndrome Cathepsin C Papillon–Lefèvre syndrome Haim–Munk syndrome Camisa disease focal: Focal palmoplantar keratoderma with oral mucosal hyperkeratosis Focal palmoplantar and gingival keratosis Howel–Evans syndrome Pachyonychia congenita Pachyonychia congenita type I Pachyonychia congenita type II Striate palmoplantar keratoderma Tyrosinemia type II punctate: Acrokeratoelastoidosis of Costa Focal acral hyperkeratosis Keratosis punctata palmaris et plantaris Keratosis punctata of the palmar creases Schöpf–Schulz–Passarge syndrome Porokeratosis plantaris discreta Spiny keratoderma ungrouped: Palmoplantar keratoderma and spastic paraplegia desmoplakin Carvajal syndrome connexin Erythrokeratodermia variabilis HID/KID

Other	Meleda disease Keratosis pilaris ATP2A2 Darier's disease Dyskeratosis congenita Lelis syndrome Dyskeratosis congenita Keratolytic winter erythema Keratosis follicularis spinulosa decalvans Keratosis linearis with ichthyosis congenital and sclerosing keratoderma syndrome Keratosis pilaris atrophicans faciei Keratosis pilaris

Other

see also Template:Congenital malformations and deformations of skin appendages, Template:Phakomatoses, Template:Pigmentation disorders, Template:DNA replication and repair-deficiency disorder

Developmental
anomalies

Midline	Dermoid cyst Encephalocele Nasal glioma PHACE association Sinus pericranii

Nevus	Capillary hemangioma Port-wine stain Nevus flammeus nuchae

Other/ungrouped	Aplasia cutis congenita Amniotic band syndrome Branchial cyst Cavernous venous malformation Accessory nail of the fifth toe Bronchogenic cyst Congenital cartilaginous rest of the neck Congenital hypertrophy of the lateral fold of the hallux Congenital lip pit Congenital malformations of the dermatoglyphs Congenital preauricular fistula Congenital smooth muscle hamartoma Cystic lymphatic malformation Median raphe cyst Melanotic neuroectodermal tumor of infancy Mongolian spot Nasolacrimal duct cyst Omphalomesenteric duct cyst Poland anomaly Rapidly involuting congenital hemangioma Rosenthal–Kloepfer syndrome Skin dimple Superficial lymphatic malformation Thyroglossal duct cyst Verrucous vascular malformation Birthmark

Metabolic disease: DNA replication and DNA repair-deficiency disorder

DNA replication

Separation/initiation: RNASEH2A
- Aicardi–Goutières syndrome 4

Termination/telomerase: DKC1
- Dyskeratosis congenita

DNA repair

Nucleotide excision repair	Cockayne syndrome/DeSanctis–Cacchione syndrome Thymine dimer Xeroderma pigmentosum IBIDS syndrome

MSI/DNA mismatch repair	Hereditary nonpolyposis colorectal cancer Muir–Torre syndrome Mismatch repair cancer syndrome

MRN complex	Ataxia telangiectasia Nijmegen breakage syndrome

Other	RecQ helicase Bloom syndrome Werner syndrome Rothmund–Thomson syndrome/Rapadilino syndrome Fanconi anemia Li-Fraumeni syndrome Severe combined immunodeficiency

Progeroid syndromes

DNA repair

RecQ-associated	Werner syndrome Bloom syndrome Rothmund–Thomson syndrome

NER protein-associated	Cockayne syndrome Xeroderma pigmentosum Trichothiodystrophy

Lamin A/C

Other/Related disorders

See also: DNA replication and repair-deficiency disorder

This article is issued from Wikipedia - version of the Monday, February 15, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.