A 55yearold woman with thyroid cancer is referred for genetic counseling. Her medical history includes surgical excision of a growth on her neck and excision of colon polyps at age 50. She was adopted, and her family history is not available. Which of the following would be the MOST compelling additional information to support testing for mutations in the PTEN gene?
A. Her first son was born at 36 weeks gestation.
B. The growth excised from her neck was a sarcoma.
C. Her head circumference is above the 98th percentile.
D. The polyps were hamartomas.