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The medical information on this site is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes. This information is not intended to be patient education, does not create any patient-physician relationship, and should not be used as a substitute for professional diagnosis and treatment.
Familial avascular necrosis of the femoral head
Overview
Avascular necrosis of the femoral head (ANFH) is a degenerative condition which causes the upper ends of the thigh bones (femurs) to break down due to an inadequate blood supply and deficient bone repair. It can lead to pain and limping and cause the legs to be of unequal length. The prevalence of ANFH is unknown but around 15,000 cases are reported each year in the United States, with most cases being associated with mechanical disruption (hip trauma or surgery), hypofibrinolysis (a reduced ability to dissolve clots), steroid use, smoking, alcohol intake, hemoglobinopathies and hyperlipidemia (an increase in the amount of fat - such as cholesterol and triglycerides - in the blood). Familial forms of ANFH appear to be very rare, with only a few families reported in the medical literature. Age of onset in these familial cases ranges from 15-48 years (as opposed to between 3rd to 5th decade of life for other forms of ANFH). Transmission in familial cases is autosomal dominant and mutations in the type II collagen gene (COL2A1) have been detected in affected family members. Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.
Trusted Medical Sites
Mayo Clinic
A website that provides disease symptoms and treatment information.
Genetic & Rare Diseases Information Center (GARD)
GARD provides the public with access to current, reliable, and easy-to-understand information about rare or genetic diseases in English or Spanish.
Support Organizations
Support organizations can provide help and guidance in areas such as peer matching, education and training, and therapy and counseling.
Disease Resources
Resources can help guide your quest for factual and reliable information.
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The Progeria Handbook; A Guide for Families and Health Care Providers of Children with Progeria.
This 100-page handbook helps answer many questions for children with Progeria about how to optimize quality of life through daily care and medical treatment. Contains basic health facts,daily care recommendations and extensive treatment guidelines.
AAMDSIF Online Academy (webinars)
200+ FREE webinars for patients, families and caregivers about rare blood cancers and bone marrow failure diseases.
Educational Resources
Publications, links to patient conferences and webinars
Disease Information
Descriptions of various rare blood cancers and bone marrow failure diseases.