What is the recommended workup and initial management for a 60‑year‑old patient presenting with left‑sided subcostal pain that began two weeks ago without any trauma?

Left-Sided Subcostal Pain in a 60-Year-Old: Workup and Management

For a 60-year-old with two weeks of left subcostal pain without trauma, obtain CT abdomen and pelvis with IV contrast as the initial imaging study 1.

Initial Clinical Assessment

Focus your history and physical examination on these specific elements:

• Red flag symptoms: Fever (suggests abscess or infection), weight loss (malignancy), early satiety (splenomegaly), or constitutional symptoms
• Past medical history: Hematologic disorders, liver disease, recent viral illness (mononucleosis), sickle cell disease, malignancy, or immunocompromised state
• Physical examination: Palpate for splenomegaly, assess for left upper quadrant tenderness, check for referred pain patterns from cardiac, pulmonary, or renal sources
• Associated symptoms: Dyspepsia (peptic ulcer disease), radiation to back (pancreatitis), pleuritic component (pneumonia), or positional changes (musculoskeletal)

The 2025 ACR Appropriateness Criteria emphasize that left upper quadrant pain is challenging because it has the lowest physical examination interrater agreement and delays in diagnosis lead to worse outcomes, especially in elderly patients 1.

Differential Diagnosis Framework

Most common causes (referred pain):

• Peptic ulcer disease, gastritis, esophagitis
• Pancreatitis
• Renal colic
• Cardiac angina or pericarditis
• Pneumonia (pleuritic)

Left upper quadrant-specific pathology:

• Splenic pathology: infarction, rupture, hematoma, abscess, splenomegaly
• Gastric pathology: outlet obstruction, neoplasm
• Colonic pathology: diverticulitis, ischemic colitis
• Adrenal hemorrhage
• Diaphragmatic hernia 2, 3

Recommended Imaging Algorithm

First-Line Imaging: CT Abdomen and Pelvis with IV Contrast

This is the workhorse modality for nonspecific left upper quadrant pain 1. The 2025 ACR guidelines demonstrate that CT:

• Changes the leading diagnosis in 51% of patients with abdominal pain
• Confirms or excludes >95% of alternative diagnoses
• Leads to changes in admission decisions for 25% of patients
• Achieves 69% sensitivity and excellent specificity for acute abdominal abnormalities in left upper quadrant pain 1

Technical considerations:

• IV contrast enhances soft tissue characterization and vascular evaluation
• Oral contrast is NOT routinely required unless suspecting leak, fistula, or postoperative complication
• Neutral oral contrast (water) is preferred if gastric evaluation needed

Alternative Imaging Scenarios

Ultrasound abdomen is appropriate if:

• Screening for splenomegaly or perisplenic collections
• Evaluating portal/splenic vein thrombosis with Doppler
• Patient cannot receive CT contrast
• Serial monitoring needed
• However, ultrasound has only 18% sensitivity for splenic infarcts compared to CT 1

MRI abdomen (with or without contrast) consider if:

• Pregnant patient
• Contraindication to CT
• Need superior soft tissue characterization of splenic parenchyma
• MRI achieves 99% diagnostic accuracy for acute abdominal pain in recent studies 1

Clinical Pitfalls and Caveats

Critical Considerations in 60-Year-Olds

1. Don't anchor on musculoskeletal causes: Even without trauma, serious pathology is common in this age group 1

2. Cardiac evaluation may be needed first: If any suggestion of cardiac symptoms (exertional component, dyspnea, diaphoresis), obtain ECG and troponin before imaging 4, 5

3. Splenomegaly increases rupture risk: Any history of hematologic disorder, liver disease, or recent viral illness warrants urgent evaluation for splenic complications 1

4. Fever mandates urgent workup: Left upper quadrant pain with fever requires immediate CT with contrast to rule out abscess, which needs source control to prevent rupture and peritonitis 1

5. Two-week duration doesn't exclude serious pathology: Malignancy, chronic splenic infarction, or indolent infections can present subacutely

Initial Management Approach

While awaiting imaging:

• NPO status if surgical pathology suspected
• IV access and fluid resuscitation if hemodynamically unstable
• Analgesia appropriate for age (careful opioid dosing in elderly) 6
• Avoid NSAIDs until peptic ulcer disease and renal pathology excluded

After CT results:

• Positive findings: Proceed with diagnosis-specific management
• Negative CT: Consider cardiac workup, endoscopy for peptic disease, or pulmonary evaluation based on clinical suspicion
• If CT negative but high clinical suspicion persists: Consider MRI or specialty consultation

The key principle is that CT abdomen/pelvis with IV contrast provides the highest yield for diagnosis and directly impacts management decisions in this clinical scenario 1.