Denise Grady

A man whose penis was removed because of cancer has received the first penis transplant in the United States, at Massachusetts General Hospital in Boston.

Fewer men are being screened for prostate cancer, and fewer early-stage cases are being detected, according to two studies published Tuesday in the Journal of the American Medical Association.

Uterine transplantation is a new frontier, one that pairs specialists from two fields known for innovation and for pushing limits, medically and ethically: reproductive medicine and transplant surgery.

The American Cancer Society says women should start having mammograms at 45 and continue yearly until 54; it previously recommended mammograms and clinical breast exams every year, starting at 40.