Nail–patella syndrome

Nail–patella syndrome
Nail–patella syndrome
Classification and external resources

Nail of a patient with nail-patella syndrome
ICD-10 Q87.2 (ILDS Q87.230)
ICD-9 756.89
OMIM 161200
DiseasesDB 8773
eMedicine ped/1546 derm/813
MeSH C05.550.629

Nail–patella syndrome (NPS) is a genetic disorder that results in small, poorly developed nails and kneecaps, but can also affect many other areas of the body, such as the elbows, chest, and hips. The name "nail-patella" can be very misleading because the syndrome often affects many other areas of the body, including even the production of certain proteins.[1]:666 It is also referred to as iliac horn syndrome, hereditary onychoostedysplasia, Fong disease or Turner–Kiser syndrome.[2]

Contents

Genetics

Nail-patella syndrome is inherited in an autosomal dominant pattern.

The Nail-patella syndrome is inherited via autosomal dominancy linked to aberrancy on human chromosome 9's q arm (the longer arm), 9q34. This autosomal dominancy means that only a single copy, instead of both, is sufficient for the disorder to be expressed in the offspring, meaning the chance of getting the disorder from an affected heterozygous parent is 50%. The frequency of the occurrence is 1/50,000.[citation needed] The disorder is linked to the ABO blood group locus.

It is associated with LMX1B.[3][4]

Symptoms

The skeletal structures of individuals who have this disorder may have pronounced deformities. As reported by several medical doctors, the following features are commonly found in people who suffer from nail–patella syndrome:[5]

Bones and joints

  • Patellar involvement is present in approximately 90% of patients; however, patellar aplasia occurs in only 20%.
  • In instances in which the patellae are smaller or luxated, the knees may be unstable.
  • The elbows may have limited motion (e.g., limited pronation, supination, extension).
  • Subluxation of the radial head may occur.
  • Arthrodysplasia of the elbows is reported in approximately 90% of patients.
  • General hyperextension of the joints can be present.
  • Exostoses arising from the posterior aspect of the iliac bones ("iliac horns") are present in as many as 80% of patients; this finding is considered pathognomonic for the syndrome.
  • Other reported bone changes include scoliosis, scapular hypoplasia, and the presence of cervical ribs.

Presentation

The hallmark features of this syndrome are poorly developed fingernails, toenails, and patellae (kneecaps). Sometimes, this disease causes the affected person to have either no thumbnails or a small piece of a thumbnail on the edge of the thumb. Other common abnormalities include elbow deformities, abnormally shaped pelvic (hip) bones, and kidney (renal) disease. Also, some research shows people with NPS are more prone to glaucoma and scoliosis, due to poorly developed spines. People with nail-patella syndrome may display only a few or many of the recognized signs of this disease. Symptoms vary widely from person to person. Signs even vary within a single family with multiple affected members.

References

  1. ^ Freedberg, et. al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. ISBN 0071380760.
  2. ^ James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. Page 786-7. ISBN 0721629210.
  3. ^ Towers AL, Clay CA, Sereika SM, McIntosh I, Greenspan SL (April 2005). "Skeletal integrity in patients with nail patella syndrome". J. Clin. Endocrinol. Metab. 90 (4): 1961–5. doi:10.1210/jc.2004-0997. PMID 15623820. http://jcem.endojournals.org/cgi/pmidlookup?view=long&pmid=15623820. 
  4. ^ Romero P, Sanhueza F, Lopez P, Reyes L, Herrera L (2011) c.194 A>C (Q65P) mutation in the LMX1B gene in patients with nail-patella syndrome associated with glaucoma. Mol Vis 17:1929-1939
  5. ^ Choczaj-Kukula, A., & Janniger, C. K. (2009). Nail-patella syndrome. In emedicine: WebMD. Retrieved October 11, 2009, from WebMD database.

See Also

  • List of cutaneous conditions

External links



Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Nail-Patella Syndrome — Le Nail Patella syndrome est une maladie génétique qui se caractérise par l atteinte des ongles, des genoux, des coudes et des ailes iliaques. Onycho ostéo dysplasie L atteinte de l ongle est la plus constante : ongle absent, hypoplasie ou… …   Wikipédia en Français

  • Nail-patella syndrome — Le Nail Patella syndrome est une maladie génétique qui se caractérise par l atteinte des ongles, des genoux, des coudes et des ailes iliaques. Onycho ostéo dysplasie L atteinte de l ongle est la plus constante : ongle absent, hypoplasie ou… …   Wikipédia en Français

  • Nail-patella syndrome — Infobox Disease Name = Nail patella syndrome Caption = Nail of a patient the nail patella syndrome DiseasesDB = 8773 ICD10 = ICD10|Q|87|2|q|80 ICD9 = ICD9|756.89 ICDO = OMIM = 161200 MedlinePlus = eMedicineSubj = ped eMedicineTopic = 1546… …   Wikipedia

  • Nail-patella syndrome — An hereditary condition characterized by abnormally formed or absent nails and underdeveloped or absent kneecaps (patellae). Other features include: {{}}Iliac horns Abnormality of the elbows interfering with full range of motion (pronation and… …   Medical dictionary

  • Nail-Patella syndrome — Le Nail Patella syndrome est une maladie génétique qui se caractérise par l atteinte des ongles, des genoux, des coudes et des ailes iliaques. Onycho ostéo dysplasie L atteinte de l ongle est la plus constante : ongle absent, hypoplasie ou… …   Wikipédia en Français

  • nail-patella syndrome — ▪ pathology       rare hereditary (autosomal dominant) disorder characterized by small fingernails and toenails that show a tendency to split; small or absent kneecaps (patellae); underdevelopment of parts of the knee, elbow joint, and shoulder… …   Universalium

  • Nail disease — or disorder Classification and external resources Onychia without granuloma ICD 10 L …   Wikipedia

  • Nail clubbing — Clubbing Clubbing of the fingernail. The red line shows the outline of a clubbed nail. ICD 10 R68.3 ICD 9 …   Wikipedia

  • Patella (os) — Rotule (os) Pour les articles homonymes, voir Rotule (homonymie). Une rotule humaine gauche …   Wikipédia en Français

  • syndrome — The aggregate of symptoms and signs associated with any morbid process, and constituting together the picture of the disease. SEE ALSO: disease. [G. s., a running together, tumultuous concourse; (in med.) a concurrence of symptoms, fr. syn,… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”