Question

Difficulty: HardPreventive Care and Screening

During a comprehensive annual evaluation, a 62-year-old man is assessed at the primary care clinic. He has a past medical history of diet-controlled type 2 diabetes mellitus and essential hypertension. His current medications include amlodipine and atorvastatin. He reports feeling well overall, though he notes intermittent, mild lower back pain after heavy yard work; the pain lacks radiation and resolves rapidly with rest and acetaminophen. He denies any bowel or bladder incontinence, saddle anesthesia, or lower extremity weakness.

His substance use history reveals that he began smoking cigarettes at age 20, consuming 1.5 packs daily until he quit on his 50th birthday. He consumes alcohol occasionally but denies illicit drug use. He has been in a monogamous marriage for 35 years.

A review of his preventive health record demonstrates:
- A screening colonoscopy performed 4 years ago at age 58 revealed no polyps or abnormalities.
- Routine screening for HIV, hepatitis B, and hepatitis C conducted at age 55 was negative.
- Following his diabetes diagnosis at age 59, he received a dose of the 20-valent pneumococcal conjugate vaccine (PCV20).
- He completed the two-dose recombinant zoster vaccine series at age 56.
- He received a tetanus, diphtheria, and acellular pertussis (Tdap) booster 3 years ago.
- He received the seasonal influenza vaccine two weeks ago.

Recent laboratory studies from a separate visit two weeks ago show a hemoglobin A1c of 6.2% and an in-range lipid profile. His physical examination today, including a detailed neurologic assessment of the lower extremities, is entirely within normal limits.

Based on current clinical guidelines, which of the following is the most appropriate next step in the management of this patient?

  1. A
    One-time screening abdominal aortic aneurysm ultrasonography
  2. B
    Magnetic resonance imaging of the lumbar spine
  3. Annual low-dose computed tomography of the chestAnswer
  4. D
    Administration of the 23-valent pneumococcal polysaccharide vaccine
  5. E
    Initiation of prostate-specific antigen testing

Answer

Annual low-dose computed tomography of the chest
The United States Preventive Services Task Force (USPSTF) recommends annual lung cancer screening with low-dose computed tomography (LDCT) for 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 patient is 62 years old, has a 45 pack-year smoking history (1.51.5 packs/day ×30\times 30 years), and quit 12 years ago. Therefore, he precisely meets all criteria for annual LDCT screening, which is a strongly indicated Grade B recommendation.

Step-by-Step Solution

1
Calculate the patient's smoking pack-year history and years since quitting.
The patient smoked 1.5 packs per day for 30 years (age 20 to 50), yielding a 45 pack-year history (1.5×30=451.5 \times 30 = 45). He quit 12 years ago.
Lung cancer screening criteria depend precisely on total smoke exposure and the recency of cessation.
2
Evaluate the patient's eligibility for lung cancer screening against current USPSTF guidelines.
The patient meets all criteria: he is within the 50-80 age range (age 62), has ≥20\geq 20 pack-years (45), and quit within the past 15 years (12 years).
Applying the Grade B recommendation for annual low-dose computed tomography (LDCT).
3
Verify if any other preventive services or diagnostic tests take precedence or are co-indicated.
AAA screening is premature (starts at age 65), pneumococcal vaccination is complete (PCV20 is a single-dose regimen), and lumbar MRI is not indicated for mechanical back pain without red flags.
Eliminating distractors based on specific age cutoffs, updated vaccine guidelines, and criteria for resource utilization.

Key Concept

Current clinical guidelines for adult preventive screening and immunizations, focusing on the indication for annual lung cancer screening.
Estimated Time:1m 30s
Rate this question