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Zorluk: ZorPreventive Care and Screening

A 59-year-old woman comes to the clinic for a routine health maintenance examination. She has a history of type 2 diabetes mellitus and primary hypertension, which are well-controlled on metformin and lisinopril. She smoked 1.5 packs of cigarettes daily for 20 years but successfully quit at age 43. Her past medical history is otherwise unremarkable. Her last screening colonoscopy was at age 49 and revealed no polyps. She had a normal screening mammogram 1 year ago, and a normal Papanicolaou (Pap) smear with negative human papillomavirus (HPV) co-testing 3 years ago. She has received all age- and risk-appropriate vaccinations, including a Tdap booster 4 years ago and a 20-valent pneumococcal conjugate vaccine (PCV20) at age 55. She currently feels well and has no complaints. Vital signs and physical examination are unremarkable. Which of the following is the most appropriate next step in preventive care for this patient?

  1. A
    Order a low-dose computed tomography (LDCT) of the chest
  2. B
    Order a dual-energy x-ray absorptiometry (DEXA) scan
  3. Recommend a screening colonoscopyCevap
  4. D
    Perform a Papanicolaou (Pap) test with human papillomavirus (HPV) co-testing
  5. E
    Administer the 23-valent pneumococcal polysaccharide vaccine (PPSV23)

Cevap

The most appropriate next step is to recommend a screening colonoscopy.
The correct answer is recommending a screening colonoscopy. The USPSTF recommends screening for colorectal cancer in all adults aged 45 to 75 years. For patients at average risk whose previous screening colonoscopy was normal, the recommended interval for repeat screening is 10 years. Because this patient had a normal colonoscopy at age 49 and is currently 59 years old, exactly 10 years have passed, making her due for her next screening.

Adım Adım Çözüm

1
Calculate the patient's smoking history and duration since cessation.
The patient has a 30 pack-year history (1.5 packs/day * 20 years). She is currently 59 and quit at age 43, meaning she quit 16 years ago.
Lung cancer screening criteria rely heavily on both the total pack-year history and the exact time elapsed since quitting.
2
Evaluate eligibility for low-dose computed tomography (LDCT).
The patient is ineligible. Although she meets the age (50-80) and pack-year (>=20) criteria, the USPSTF guidelines stipulate that screening should be discontinued once a person has not smoked for 15 years.
Recognizing the 15-year cutoff is critical to avoid unnecessary radiation exposure and false-positive workups.
3
Evaluate the timeline of her prior cancer screenings and immunizations.
Colonoscopy: performed 10 years ago (due now). Mammogram: performed 1 year ago (due every 2 years, up to date). Pap/HPV: performed 3 years ago (due every 5 years, up to date). PCV20: received at age 55 (complete series, up to date).
Preventive care requires applying specific intervals to a patient's historical data to identify current needs.
4
Select the single indicated intervention.
Screening colonoscopy is the only indicated intervention at this visit.
The standard interval for colorectal cancer screening in an average-risk patient following a normal colonoscopy is 10 years.

Anahtar Kavram

USPSTF preventive screening intervals and discontinuation criteria, specifically recognizing that lung cancer screening is discontinued 15 years after smoking cessation.
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Preventive Care and Screening

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