POMS Reference

Table of contents Recent changes
Contact
Back
This change was made on Mar 28, 2018. See latest version.
Text removed
Text added

DI 23022.360: Ataxia Telangiectasia

changes
← * →
  • Effective Dates: 11/25/2016 - Present
  • Effective Dates: 03/28/2018 - Present
  • TN 3 (02-10)
  • TN 16 (03-18)
  • DI 23022.360 Ataxia Telangiectasia
  • ATAXIA TELANGIECTASIA
  • ALTERNATE NAMES
  • Boder-Sedgwick Syndrome; Louis-Bar Syndrome; Ataxia Telangiectasia syndrome; A-T; Cerebello-oculocutaneous Telangiectasia
  • DESCRIPTION
  • Ataxia Telangiectasia (A-T) is a rare, inherited childhood neurological disorder that causes degeneration in the part of the brain that controls motor movements and speech.
  • The gene responsible for A-T, known as ATM (ataxia-telangiectasia mutated) makes a protein that activates a number of other proteins that control cell cycle, DNA repair, and cell death. Without it, cells are unable to activate the cellular checkpoints that protect against the damage of ionizing radiation and other agents that can harm DNA.
  • The most unusual symptom of A-T is an acute sensitivity to ionizing radiation, such as X-rays or gamma-rays. The first signs of the disease, which include delayed development of motor skills, poor balance, and slurred speech, usually occur during the first decade of life. Telangiectasias (tiny, red "spider" veins), which appear in the corners of the eyes or on the surface of the ears and cheeks, are characteristic of the disease, but are not always present and generally do not appear in the first years of life.
  • About 20% of those with A-T develop cancer, most frequently acute lymphocytic leukemia or lymphoma. Many people with A-T have a weakened immune system, making them susceptible to recurrent respiratory infections.
  • Other features of the disease may include:
  • * mild diabetes mellitus,
  • * premature graying of the hair,
  • * difficulty swallowing, and
  • * delayed physical development.
  • Children with A-T usually have normal or above normal intelligence. A-T affects boys and girls equally.
  • DIAGNOSTIC
  • TESTING, PHYSICAL FINDINGS, AND ICD-9-CM CODING
  • A physical exam revealing symptomology of the disease, laboratory testing including Alpha fetoprotein, B and t cell screen, carcinoembronic antigen, genetic testing for ATM gene, glucose tolerance testing, serum immunoglobulin levels, and x-rays of the thymus gland to determine the size of the gland.
  • ICD-9: 334.8
  • ONSET AND PROGRESSION
  • The prognosis for people with A-T is poor. People with the disease usually die in their teens or early 20s.
  • Complications that can arise from A-T include:
  • * lymphoma (cancerous tumors that are in the lymph nodes),
  • * diabetes,
  • * kyphosis (abnormal curvature of the spine) resulting in a progressive movement disorder that leads to wheelchair use,
  • * scoliosis, and
  • * severe, recurrent lung infections.
  • TREATMENT
  • There is no cure for A-T and, currently, no way to slow the progression of the disease. Treatment is symptomatic and supportive. Physical and occupational therapy may help maintain flexibility. Speech therapy may also be needed. Gamma-globulin injections may be given to help supplement a weakened immune system. High-dose vitamin regimens may also be used.
  • SUGGESTEDPROGRAMMATIC ASSESSMENT*
  • SUGGESTED PROGRAMMATIC ASSESSMENT*
  • Suggested MER for Evaluation: If sequence analysis of the ATM gene has identified mutations in both alleles in the proband, then the diagnosis of A-T is confirmed. If this is unavailable, then a complete review of the clinical course, findings, and the available laboratory studies on which the disorder is suspected will be needed. Once the diagnosis is confirmed, then a review of the current examination will be needed to establish severity as variability in this disorder, although rare, has been reported.
  • Suggested Listings for Evaluation:
  • DETERMINATION
  • LISTING
  • REMARKS
  • Meets Listing
  • 111.17
  • 11.17
  •  
  • Medical Equals
  •  
  •  
  • * Adjudicators may, at their discretion, use the Medical Evidence of Record or Listings suggested to evaluate the claim. However, the decision to allow or deny the claim rests with the adjudicator.
The materials available at this web site are provided free of charge, for informational purposes only, and without warrant by True Link Financial, Inc., and are not legal advice or Social Security benefits advice. You should contact your attorney to obtain advice with respect to any particular issue or problem, or the Social Security Administration with any general inquiries. Click here to view this section of the POMS on the Social Security Administration website.