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Sharp Right Upper Back Pain with Breathing and Sneezing: Differential Diagnosis

Sharp right upper back pain provoked by deep breathing or sneezing suggests involvement of structures moving with respiration: thoracic wall, pleura, or referred visceral pain.

Musculoskeletal Causes (Most Common)

  • Intercostal muscle strain: Sudden contraction during sneeze/cough → tear. Sharp, localized, reproducible with palpation/movement.
  • Costochondritis / costovertebral joint dysfunction: Rib articulation inflammation/restriction. Pain with deep inspiration, twisting.
  • Thoracic facet joint irritation: Facet capsular strain with extension/rotation.
  • Serratus anterior / rhomboid strain: Scapulothoracic mechanics disrupted.

Pulmonary/Pleural Causes

  • Pleuritis (pleurisy): Viral, bacterial, autoimmune, PE. Sharp, inspiratory pain. Friction rub on auscultation.
  • Pneumothorax: Sudden pleuritic pain + dyspnea. Primary (tall thin males) or secondary (COPD). Tension = emergency.
  • Pneumonia (lower lobe): Can refer pain to back. Fever, cough, consolidation signs.
  • Pulmonary embolism: Pleuritic pain + tachycardia, hypoxia, DVT risk factors. Wells/PE rule-out criteria.

Cardiac Causes (Less Likely but Critical)

  • Pericarditis: Sharp, positional (better leaning forward), friction rub. Diffuse ST elevation.
  • Aortic dissection: Tearing, radiating to back. Pulse deficits, BP differential. CTA required.
  • Ischemia: Atypical presentation (especially women, diabetics).

Other Considerations

  • Herpes zoster (shingles): Dermatomal pain precedes rash by days.
  • Neoplasm: Pancoast tumor, metastasis to ribs/spine.
  • Visceral referral: Gallbladder (RUQ → right scapula), liver capsule distension.

Evaluation Priorities

  1. History: onset, character, radiation, associated symptoms, risk factors.
  2. Vitals: SpO₂, BP bilateral, HR, temp.
  3. Exam: chest wall palpation, lung/heart auscultation, neurovascular.
  4. EKG, CXR, D-dimer (if PE suspected), troponin.
  5. CT chest/PE protocol if high suspicion.

Any acute pleuritic pain + dyspnea/hypoxia/hemodynamic instability → ER immediately.

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