CRITICAL ELEMENTS OF GENETIC EVALUATION AND GENETIC COUNSELING

 

Individual with TRISOMY 21 DOWN SYNDROME -or individual with chromosomes pending

Date: 7-12-96*

 

Disclaimer

The "Critical Element of Genetic Evaluation and Genetic Counseling" was written and approved by genetic professionals and perinatologists within the state of Washington. The document is to act as an aid to medical geneticists, genetic counselors, and perinatologists who practice within our state. This Critical Element of Genetic Evaluation and Genetic Counseling does not define the applicable standard of care, nor is it intended to dictate an exclusive course for the diagnosis, counseling, treatment or management of genetic conditions or birth defects. The authors acknowledge that appropriate clinical practices may vary depending upon a number of factors including, among others, the needs and choices of the individual patient, the resources available, and limitations unique to the particular institution or type of practice.

 

Information obtained from patient/family

1. Review patient/family questions; reason for referral; knowledge base; perception of disease status and/or risk; what diagnoses have been considered; perceived notion about causation; assess need for professional interpreter:

2a. Using standard symbols, obtain family history (1st and 2nd degree relatives to consultand, and further removed as appropriate). Note ethnic background, consanguinity, ongoing pregnancies, and other significant family history.

b. Additional directed family history: miscarriages, neonatal death, known or suspected chromosome abnormalities, Down Syndrome, individuals with multiple anomalies/MR.

c. Obtain relevant medical records on patient, including records of 1).appropriate tests/evaluations: karyotype, genetic evaluations 2). records bearing on management: thyroid, CBC, echocardiogram and 3). on other family members as needed: karyotype

3. Obtain prenatal and perinatal history of patient, including prenatal exposures, pregnancy complications and prenatal testing, when appropriate.

4. Obtain past medical history (including environmental/occupational exposures) focusing on: congenital heart disease, GI, hematology, development, vision, hearing/ear infections.

5. Obtain information on growth and development, including school placement. For adult, also obtain information on education, employment and social functioning.

6. Assess family functioning and use of community resources. Assess personal, social, religious, ethnocultural issues.

7. Assess possible ethical concerns, such as confidentiality, non-paternity, insurability, discrimination, prenatal diagnosis:

8 Perform general physical examination of patient and/or other family members present if indicated, with attention to: physical stigmata of Down Syndrome, heart, growth (ht, wt, OFC), informal developmental assessment.

9. Other issues to consider:

 

Information to be provided or discussed with the patient/family

(this may occur in a series of multiple patient visits)

1. Summarize information obtained and discuss with patient/family the (possible) diagnosis and the degree of certainty of the diagnosis based on available information.

2. a). Recommend relevant tests/evaluations on patient and/or on other relatives which may include:

patient:

diagnostic:

karyotype
  management: age dependent

other relatives:

diagnostic:

 

b). Discuss sensitivity/specificity of test(s)/evaluation(s):

3. Discuss the following issues related to natural history: prognosis, developmental outcome/intellectual functioning, anticipated possible medical complications, including pregnancy related risks for affected women if indicated, and preventive measures: reproductive issues.

4. Review inheritance pattern (including penetrance and expressivity): sporadic chromosomal

5. Assess and discuss recurrence risk for future pregnancies, for affected and at risk individuals. Discuss general background risk for birth defects and recommendations for preconceptional and prenatal use of 0.4 mg folate per day. Including any additional risk based on family history/ethnicity/maternal age/maternal disease/maternal exposure/others; discuss recommendations for preconceptional folic acid supplementation:

6a. Discuss reproductive options (e.g. assisted reproductive technologies, adoption, taking risk and no additional pregnancies) when appropriate: pregnancy with or without prenatal diagnosis.

b. Discuss prenatal diagnostic options/issues: refer to prenatal CE.

(or referral for discussion of)

7. Review management recommendations/options including screening protocols: As outlined in the American Academy of Pediatrics Health Supervision for Child with Down Syndrome.

8. Consider referral to: (medical specialties) cardiology, ophthalmology, developmental pediatrician, audiologist, PT/OT

9. Address psychosocial issues including anticipatory guidance, patient and family reaction to diagnosis, need for community support services.

a. available local/national resources:

 

Infant Stimulation Program; Infant-Toddler Early Intervention Program
Family Resources Project
(360) 586-2810 (to identify local contact)

Association for Children with Down Syndrome, Inc. (ACDS)
2616 Martin Avenue, Bellmore, NY 11710-3169
(516) 221-4700
Fax: (516) 221-4311

National Down Syndrome Congress (NDSC)
1605 Chantilly Drive, Suite 250
Atlanta, GA 30324-3269
(404) 633-1555 1-800-232-6372
Fax: (404) 633-2817

National Down Syndrome Society (NDSS)
666 Broadway
New York, NY 10012
(212) 460-9330 1-800-221-4602
Fax: (212) 979-2873

Parent Assistance Committee on Down Syndrome (PACDS)
208 Lafayette Avenue, Peekskill, NY 10566
(914) 739-4085

b. available written resources for families:

 

Pueschel, S A Parents Guide to Down Syndrome Brookes Publishing Co.,
Baltimore, 1990

Stray-Gunderson (eds) Babies with Down Syndrome: A New Parent's Guide .

Woodine House, Rockville, MD., 1986

 

10. Address follow-up issues, such as genetic counseling for extended family members, including a plan for relaying test results:

11. Document clinic visit, including persons present, and subsequent substantive contacts (e.g. clinic note, +/- letter to referral source, +/- letter to family; other). Contact referring health care provider as appropriate.

12. Other issues to consider:

13. References and/or other protocols:

"Health Supervision for Children with Down Syndrome"(Committee on Genetics)Pediatrics 93(5): May 1994.

"Atlantoaxial Instability in Down Syndrome: Subject Review" (Committee on Sports Medicine and Fitness) Pediatrics 96(1): July 1995.

Lott, I.T., McCoy, E.E. (eds) Down Syndrome Advances in Medical Care.Wiley-Liss, New York, 1993.

 

* This Critical Element of Genetic Evaluation and Genetic Counseling was unanimously approved at a state genetics practitioners meeting on 7/12/96.


 

CRITICAL ELEMENTS OF GENETIC EVALUATION AND GENETIC COUNSELING

 

Pregnant woman with a family history of Trisomy 21 or "Down syndrome"

Date: 7-12-96*

 

Disclaimer

The "Critical Element of Genetic Evaluation and Genetic Counseling" was written and approved by genetic professionals and perinatologists within the state of Washington. The document is to act as an aid to medical geneticists, genetic counselors, and perinatologists who practice within our state. This Critical Element of Genetic Evaluation and Genetic Counseling does not define the applicable standard of care, nor is it intended to dictate an exclusive course for the diagnosis, counseling, treatment or management of genetic conditions or birth defects. The authors acknowledge that appropriate clinical practices may vary depending upon a number of factors including, among others, the needs and choices of the individual patient, the resources available, and limitations unique to the particular institution or type of practice.

 

Information to be obtained from patients/family

1. Review patient/family questions; reason for referral; knowledge base; perception of disease status and/or risk; what diagnoses have been considered; perceived notion of causation; assess need for professional interpreter:

2a. Using standard symbols, obtain family history (1st and 2nd degree relatives to consultand, and further removed as appropriate). Note ethnic background, consanguinity, ongoing pregnancies, and other significant family history.

b. Additional directed family history: miscarriages, neonatal death, known or suspected chromosome abnormalities, Down Syndrome, individuals with multiple anomalies/MR.

c. Obtain relevant medical records on patient/affected family member(s), including records on appropriate diagnostic testing/evaluation: karyotype and genetic evaluations and on other family members as needed:

3. Obtain patient's past and current pregnancy history; documenting gestational age, Rh, prenatal exposures, pregnancy complications and pertinent prenatal testing to date.

4. Obtain patient's past medical history.

5. Obtain information on education, employment and social functioning as appropriate.

6. Assess family functioning and use of community resources, as appropriate. Assess personal (e.g. social, ethnocultural, religious) issues, including feelings about prenatal testing and consequences.

7. Assess ethical issues, such as confidentiality, insurability, discrimination and non-paternity.

8. Other issues to consider:

 

Information to be provided or discussed with patient/family

(this may occur in a series of multiple patient visits)

1a). Discuss risk of specific condition occurring in current pregnancy based on information available. Arrange for additional tests/evaluations on consultand and/or father of the baby if indicated: increased recurrence risk for trisomies is identified for couple with a child with Trisomy 21; all other family members have the maternal age related risk for chromosome abnormalities.

b). Discuss sensitivity/specificity of test(s)/evaluation(s):

c). Discuss referral of other family members for genetic testing/evaluation if inheritable disease is suspected and confirmation is necessary.

2a). Discuss general background risk for birth defects, including any additional risk based on family history/ethnicity/maternal age/maternal disease/maternal exposure/others:

b). Discuss inheritance pattern of disorder, including risk for future pregnancies:

3. Discuss the following issues related to natural history: prognosis, developmental outcome/intellectual functioning, anticipated possible medical complications, including pregnancy related risks for affected women if indicated, and preventive measures:

4a).Review prenatal testing options as indicated:

a). techniques

CVS (10-12 weeks)
early amniocentesis (<15 weeks)
amniocentesis (>15 weeks)

b). laboratory tests

karyotype

 

b). Discuss risks and limitations of prenatal testing options, including sensitivity/specificity of test method(s):

5. Explore psychosocial impact of testing vs. non-testing, ethical issues, and discuss the decision making process. Refer to outside resources as appropriate to help with decision making. (Process includes the discussion of outcomes/results; additional testing; option of termination of pregnancy; grief and supportive counseling; pediatric follow up; and support groups).

6. Document status of decision making by patient/family.

7. Make arrangements for testing if desired and plan for relaying results and for follow-up.

8. Consider referral to specific community resources and support groups.

9. Document the clinic visit, including persons present, and subsequent substantive contacts (e.g. clinic note, +/- letter to referring source, +/- letter to family, other). Contact referring health care provider as appropriate.

10. Other issues to consider: Maternal Serum Screening

11. References and/or other protocols:

 

 

* This Critical Element of Genetic Evaluation and Genetic Counseling was unanimously approved at a state genetics practitioners meeting on 7/12/96.

 

For more information, contact:
Debra Lochner Doyle, MS, CGC
Washington State Department of Health
Genetics Services Section
MS:K17-8
20435 72nd Ave. S Ste. 200
Kent, WA 98032
Phone: (253) 395-6742
Fax: (253) 395-6737
debra.lochnerdoyle@doh.wa.gov