Should a 22-year-old woman with recent 13% weight loss, post‑prandial nausea, irregular periods, a new sexual partner, and recent initiation of the contraceptive injection (depot medroxyprogesterone acetate) undergo an urgent transvaginal ultrasound and be screened with a cervical smear?

Urgent Transvaginal Ultrasound is NOT Appropriate; Cervical Smear is NOT Indicated

An urgent transvaginal ultrasound is not appropriate for this clinical presentation, and cervical screening (smear) should not be performed as she is under 21 years of age. 1

Cervical Screening

The first Pap test should be performed at 21 years of age, regardless of sexual activity or new partners 1. The only exceptions are:

• HIV infection
• Immune suppression
• Previously documented CIN 2/3 or carcinoma

Cervical cancer develops several decades after HPV exposure and is rare in women under 21 years. Although sexually active adolescents are commonly exposed to HPV and may develop abnormal cervical cells, these changes resolve without intervention in the vast majority of cases. Furthermore, interventions for abnormal cervical cytology in this age group cause unnecessary anxiety and may contribute to future pregnancy complications 1.

Pelvic/Transvaginal Ultrasound

Screening pelvic examination and transvaginal ultrasound are not indicated in asymptomatic women 2. The American College of Physicians strongly recommends against performing screening pelvic examination in asymptomatic, nonpregnant adult women because harms outweigh any demonstrated benefits 2.

Specific Indications for Pelvic Examination in Young Women

A pelvic examination (including transvaginal ultrasound) IS indicated for 1:

• Lower abdominal pain
• Persistent vaginal discharge
• Abnormal vaginal bleeding unrelated to contraception
• Suspected pregnancy complications
• Suspected/reported sexual abuse

This Patient's Presentation

Her symptoms—13% weight loss, post-prandial nausea, and irregular periods—are:

1. Expected side effects of depot medroxyprogesterone acetate (DMPA):

   • Weight changes are common (average gain of 5.4 lb at 1 year, though weight loss can occur) 3
   • Menstrual irregularities occur in the vast majority of users, with 55% experiencing amenorrhea by month 12 3
   • Nausea is a recognized side effect 3

2. Not indications for urgent pelvic imaging: These symptoms do not suggest acute pelvic pathology requiring urgent transvaginal ultrasound 1, 2, 4

What Should Be Done Instead

Immediate Assessment:

• Pregnancy test (urine-based)—essential given new sexual partner and irregular bleeding 5
• STI screening using urine-based nucleic acid amplification tests or self-collected vaginal swabs—no speculum examination required 1
• Evaluation of weight loss and nausea: Consider gastrointestinal causes, eating disorders, thyroid dysfunction, or other systemic illness unrelated to gynecologic pathology

Contraception Counseling:

• No pelvic examination was required before initiating DMPA 1, 5, 3
• Counsel that irregular bleeding and menstrual changes are expected and typically improve with continued use 3, 6, 7
• If symptoms are intolerable, consider alternative contraceptive methods 6

When to Consider Pelvic Examination:

Only if she develops 1:

• Lower abdominal pain
• Persistent abnormal vaginal discharge
• Bleeding that persists beyond 3 months or becomes heavy/continuous despite reassurance about DMPA effects

Common Pitfalls to Avoid

1. Performing unnecessary pelvic examinations in young women: This causes fear, anxiety, embarrassment, pain, and may lead to false-positive findings requiring unnecessary procedures 2

2. Screening for cervical cancer before age 21: This leads to overtreatment of transient HPV infections and cervical changes that would resolve spontaneously 1

3. Attributing all symptoms to gynecologic pathology: Her weight loss and nausea warrant evaluation for non-gynecologic causes

4. Not recognizing expected DMPA side effects: Irregular bleeding and menstrual changes are the norm, not an indication for imaging 3, 6, 7