Oncologic Emergencies: Local Tumor Effects

Local tumor effects from cancer can threaten airway, spinal cord, venous return, bone integrity, and cardiac filling long before a diagnosis is confirmed. In emergency medicine, the key is recognizing the pattern early and choosing the imaging study that actually answers the question.

Local Tumor Effect Emergencies

• Bone metastasis clues: Metastatic bone disease usually hits the axial skeleton and proximal limbs, with localized pain and mixed osteolytic or osteoblastic change as the bedside clue in patients with breast, lung, or prostate cancer.
• Imaging beyond plain films: Plain x-ray misses roughly half of metastatic bone lesions, so CT with IV contrast is the ED workhorse when suspicion for pathologic fracture stays high after a negative film. We get into the imaging logic in the episode.
• Superior vena cava syndrome: SVC syndrome is an upper-body venous obstruction problem, most often from lung tumors in about 70% of cases and lymphoma in about 20%, producing facial swelling, dyspnea, and arm edema.
• Airway obstruction pitfall: Malignant airway obstruction can present with stridor and tachypnea from an oropharyngeal, neck, or mediastinal mass, and direct laryngoscopy is a classic mistake because it can convert partial obstruction into complete obstruction.
• Malignant pericardial effusion: Up to 35% of cancer patients have pericardial involvement, but most malignant effusions are small and silent; electrical alternans or an enlarged cardiac silhouette can be the clue before echo confirms it.
• Spinal cord compression warning: Malignant spinal cord compression is a thoracic-spine disease until proven otherwise, with back pain, radicular symptoms, or bowel and bladder dysfunction demanding MRI with IV contrast of the entire spine.

References:

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