Huntington Disease Predictive Testing When the Mother Objects
Lena, 26, requests predictive testing for Huntington disease. Her maternal aunt died at 58 with HD, and her mother, now 50, is asymptomatic and has repeatedly said she does not want testing because 'what I don't know won't hurt me.' Lena's mother also asked the clinic not to test Lena because a positive result would tell the mother she carries the expansion. Lena insists: she is planning a pregnancy within a year and wants to know before deciding about prenatal testing. She says if positive she will tell her mother immediately because 'she deserves to know.' The counselor confirms Lena has capacity, no depression on screening, and a partner who supports her. The clinic's policy requires counseling about family implications but does not require family consent. Lena's mother is not a patient at this clinic.
1. May the clinic proceed with predictive testing over the mother's objection?
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Yes, if Lena meets usual predictive-testing criteria. The mother's objection is relevant to counseling but is not a veto over a competent adult's access to her own genetic information. The mother is not the patient, and the clinic does not need her consent to test Lena. However, the counselor should not treat the mother's request as irrelevant. Explore Lena's reasons, timing, and support, and confirm she understands that a positive result would imply her mother almost certainly carries the expansion, while a negative result would substantially reduce but not eliminate her mother's risk. Discuss that the mother has chosen not to know and that Lena's disclosure could disrupt that choice. Confirm Lena has considered alternatives, such as waiting until after pregnancy planning or testing without immediate disclosure. Document the counseling. If the clinic has a policy requiring family involvement, apply it as counseling, not as a mandatory consent requirement. Proceed with pretest counseling, neurological and psychological assessment, and explicit discussion of result disclosure.
2. What should pretest counseling cover about disclosure to the mother?
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Explain the information implications clearly. If Lena's father is unaffected and paternity is as stated, a positive HD result means Lena inherited the expansion from her mother, so her mother's prior 50% risk becomes effectively certain. A negative result reduces the mother's risk substantially but does not prove the mother is unaffected, because Lena could have inherited the unaffected allele while her mother carries the expansion. Discuss that the mother has expressed a preference not to know and that Lena cannot control how her mother reacts. Ask Lena to consider whether immediate disclosure is necessary, what she would say, and whether a joint session with a counselor could help. Do not require Lena to keep the result secret or to tell her mother. Clarify that the clinic will not contact the mother without Lena's authorization. Offer to rehearse disclosure and to provide resources for the mother if she later wants testing. Document Lena's plan and her understanding of the possible family consequences.
3. Lena tests positive and asks the counselor to inform her mother. What should the counselor do?
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Do not contact the mother without authorization. The result belongs to Lena; the mother is not a patient, and unsolicited disclosure would breach Lena's confidentiality and may also impose information the mother has said she does not want. Explain that the counselor can help Lena disclose, but cannot make the call for her unless Lena provides written authorization for a specific communication. Offer options: a joint counseling session, a letter drafted with Lena, or a conversation coached in advance. If the mother later contacts the clinic, the counselor can listen, explain the limits of what can be confirmed without the mother's own testing, and offer an appointment. If Lena is in crisis or at risk, address immediate safety, but that does not automatically justify disclosure to the mother. Document the request, the refusal, and the alternatives offered. The ethical priority is Lena's autonomy and confidentiality while supporting her in managing the family information.