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Difficulty: MediumPreventive Care and Screening

During a comprehensive health evaluation, a 54-year-old man establishes care with a new physician. He reports no acute complaints and notes that he exercises moderately three times a week. His medical history includes diet-controlled type 2 diabetes mellitus. He smoked one and a half packs of cigarettes daily for 20 years, equating to a 30 pack-year smoking history, but completely ceased smoking 12 years ago. A review of his previous medical records reveals a structurally normal colon on a screening colonoscopy performed at age 48 and a negative hepatitis C antibody test three years ago. His vital signs are within normal limits, and his physical examination is unremarkable. In addition to reviewing his vaccinations, which of the following preventive interventions is most strongly indicated for this patient?

  1. A
    Routine resting electrocardiography
  2. B
    One-time ultrasound of the abdominal aorta
  3. Annual low-dose computed tomography of the chestAnswer
  4. D
    Repeat screening colonoscopy
  5. E
    Carotid duplex ultrasonography

Answer

Annual low-dose computed tomography of the chest
The correct answer accurately identifies that the patient meets the established criteria for lung cancer screening. Major guidelines recommend annual screening for lung cancer using low-dose computed tomography (LDCT) in adults aged 50 to 80 years who have a 20 pack-year smoking history and either currently smoke or have quit within the past 15 years. This 54-year-old patient has a 30 pack-year history and quit 12 years ago, making LDCT the most strongly indicated preventive intervention for him today.

Step-by-Step Solution

1
Analyze the patient's demographic and risk factor profile.
The patient is a 54-year-old man with a 30 pack-year smoking history who quit 12 years ago, and had a normal screening colonoscopy 6 years ago.
Accurate assessment of age, prior testing dates, and specific behavioral risk factors dictates the currently indicated preventive screening.
2
Determine eligibility for lung cancer screening.
The patient is between 50 and 80 years old, has at least a 20 pack-year smoking history, and quit within the last 15 years.
Current USPSTF guidelines recommend annual low-dose CT for this specific demographic to reduce lung cancer mortality.
3
Evaluate the indications for the alternative screening modalities presented.
The patient does not meet age criteria for AAA screening, is not yet due for a repeat colonoscopy, and asymptomatic cardiovascular screening is not recommended.
Applying age limits and appropriate screening intervals prevents overtesting, unnecessary radiation exposure, and harmful downstream invasive procedures.

Key Concept

Evidence-based preventive screening guidelines for adults, specifically focusing on lung cancer screening criteria and appropriate intervals for colon cancer screening.
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Topics

Preventive Care and Screening

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