Evolution of Visual Impairment During Pseudoxanthoma Elasticum

This study has been completed.
Sponsor:
Information provided by:
European Georges Pompidou Hospital
ClinicalTrials.gov Identifier:
NCT00555113
First received: November 6, 2007
Last updated: NA
Last verified: November 2007
History: No changes posted
  Purpose

Pseudoxanthoma elasticum is a disease whom frequency is estimated about 1/50000 to 1/100 000. There is a female preponderance with a sex-ratio of 2:1. PXE is transmitted according either to an autosomal dominant mode or to an autosomal recessive one. Mutations in the ABCC6 gene on chromosome 16p13.1 have recently been identified causing PXE. The elastic fibers slowly become mineralized mainly in the skin, the eyes, and the cardiovascular system. PXE is a multisystem disease that includes a spectrum of clinical manifestations affecting the skin, the eye or the cardiovascular system as well as other tissues. It can be responsible for severe and life threatening complications. Skin changes are usually the first manifestations and begin in early childhood. The vital prognosis of PXE depends on the severity of the cardiovascular lesions that could be responsible for sudden death in children and young adults.

Ocular manifestations are quite constant and include chorioretinal scarring, pigmentary changes or angioid streaks. The natural evolution of the angioid streaks leads to their enlargement or to the occurrence of subfoveal choroidal neovascularizations and hemorrhages leaving macular scares. A self-monitoring is recommended since early treatment of subfoveal CNV is the only way to minimize their pejorative consequences. The gold standard treatment of the CNV consists in the photocoagulation. New therapeutics has been developed including photodynamic therapy or intravitreal injection of anti-angiogenic agents and they seems to be effective to reduce the immediate complications of a limited CNV. This evolution explains that 50 to 70 % of the patients have a poor vision or legal blindness of one or both eyes. However, little is known about the age of occurrence of visual impairment in PXE patients. That is the reason why we decided to review the ophthalmologic status and visual history of our population of PXE patients according to their age.


Condition
Pseudoxanthoma Elasticum

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Retrospective
Official Title: Evolution of Visual Impairment During Pseudoxanthoma Elasticum

Resource links provided by NLM:


Further study details as provided by European Georges Pompidou Hospital:

Primary Outcome Measures:
  • Visual acuity according to age [ Time Frame: 7 years ]

Secondary Outcome Measures:
  • Macular aspect and outcoming of choroidal neovascularization [ Time Frame: 7 years ]

Enrollment: 38
Study Start Date: January 2000
Study Completion Date: September 2007
Groups/Cohorts
1
pseudoxanthoma elasticum

Detailed Description:

A retrospective review of all cases of PXE patients referred by the Department of Genetics should be performed. This ophthalmologic examination has been conducted as part of the usual follow up for such PXE patients or for the needs of a treatment of complications of angioid streaks such as CNV complications.

As we studied the age of poor vision occurrence, we propose to take in account the first examination when a best-corrected visual acuity (BCVA) under 20/50 was observed. All past medical events obtains from the data of the patients will be recorded, especially ophthalmologic ones.

  Eligibility

Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population

patients with pseudoxanthoma elasticum confirmed by the Department of Genetics according to the usual clinical, histological or genetic criterion.

Criteria

Inclusion Criteria:

  • pseudoxanthoma elasticum confirmed by the Department of Genetics according to the usual clinical, histological or genetic criterion.

Exclusion Criteria:

  • No pseudoxanthoma elasticum
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00555113

Locations
France
Department of ophthalmology, HEGP
Paris, France, 75015
Sponsors and Collaborators
European Georges Pompidou Hospital
Investigators
Principal Investigator: Christophe ORSSAUD, MD department of ophthalmology, HEGP, AP - HP, France
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00555113     History of Changes
Other Study ID Numbers: 2
Study First Received: November 6, 2007
Last Updated: November 6, 2007
Health Authority: France: Institutional Ethical Committee

Keywords provided by European Georges Pompidou Hospital:
pseudoxanthoma elasticum
Visual acuity
Choroidal neovascularization
angioid streaks

Additional relevant MeSH terms:
Pseudoxanthoma Elasticum
Vision, Low
Vision Disorders
Hemostatic Disorders
Vascular Diseases
Cardiovascular Diseases
Hemorrhagic Disorders
Hematologic Diseases
Skin Abnormalities
Congenital Abnormalities
Skin Diseases, Genetic
Genetic Diseases, Inborn
Connective Tissue Diseases
Skin Diseases
Sensation Disorders
Neurologic Manifestations
Nervous System Diseases
Eye Diseases
Signs and Symptoms

ClinicalTrials.gov processed this record on April 17, 2014