A healthy 24-year-old woman comes for a routine health maintenance examination. Menses occur at regular 28-day intervals and last 5 to 6 days. Her last menstrual period was 3 weeks ago. She takes no medications. Bimanual examination shows a 5-cm, mildly tender left adnexa. A pregnancy test is negative. Which of the following is the most appropriate next step in management?
A) Repeat examination in 2 weeks
B) Measurement of serum CA 125 level
C) Measurement of serum α-fetoprotein level
D) CT scan of the pelvis
E) Diagnostic laparoscopy
A) Repeat examination in 2 weeks
B) Measurement of serum CA 125 level
C) Measurement of serum α-fetoprotein level
D) CT scan of the pelvis
E) Diagnostic laparoscopy