Aase syndrome

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Aase syndrome Classification and external resources
OMIM	147800
DiseasesDB	29332

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Aase syndrome or Aase-Smith syndrome is a rare inherited disorder characterized by anemia with some joint and skeletal deformities. Aase syndrome is thought to be an autosomal dominant inherited disorder. The genetic basis of the disease is not known. The anemia is caused by underdevelopment of the bone marrow, which is where blood cells are formed. It is named after the American paediatricians Jon Morton Aase and David Weyhe Smith.

Symptoms

• Mildly slowed growth
• Pale skin
• Delayed closure of fontanelles (soft spots)
• Narrow shoulders
• Triple jointed thumbs, absent or small knuckles, decreased skin creases at finger joints
• Inability to fully extend the joints from birth (congenital contractures)
• Cleft palate
• Deformed ears
• Droopy eye lids

Signs and tests

• A CBC (complete blood count) will show anemia and a decrease in the white blood cell count.
• An echocardiogram may reveal heart defects (ventricular septal defect is most common).
• X-rays will show skeletal abnormalities as described above.
• A bone marrow biopsy may be performed.

Treatment

Frequent blood transfusions are given in the first year of life to treat anemia. Prednisone may be given, although this should be avoided in infancy because of side effects on growth and brain development. A bone marrow transplant may be necessary if other treatment fails.

Prognosis

Anemia usually resolves over the years.

Complications

• Complications related to anemia include weakness, fatigue, and decreased oxygenation of the blood.
• Decreased white blood cells alter the body's ability to fight infection.
• If a heart defect exists, it may cause multiple complications (depending on the specific defect).
• Severe cases have been associated with still birth or early death.

Prevention

As with most genetic diseases there is no way to prevent the entire disease. With prompt recognition and treatment of infections in childhood, the complications of low white blood cell counts may be limited.

References

• Aase JM, Smith DW (1968). "Dysmorphogenesis of joints, brain, and palate: a new dominantly inherited syndrome". J Pediatr 73 (4): 606-9. PMID 5678002fr:Syndrome d'Aase

id:Sindrom Aase

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .