Medical-Surgical Nursing 8th Edition by Donna Ignatavicius , Linda Workman

Exercise 1

A 22-year-old man has a maternal grandfather with Huntington disease (HD). His father, mother, and paternal grandfather are all healthy and free of HD manifestations. He wants to know whether he also has the HD gene and arranges to be tested. His mother does not want to know whether she has the gene mutation. The man is tested and is found to be positive for the gene mutation that causes HD.
Why could a positive test affect this man's mother?