Pancoast syndrome vs Superior vena cava syndrome
How to tell Pancoast syndrome and Superior vena cava syndrome apart when a board question makes them look alike.
Pancoast: apical tumor with arm pain and Horner syndrome; SVC syndrome: facial plethora, JVD, and upper-body edema from venous obstruction.
Side by side
Apical superior sulcus tumor invading brachial plexus and sympathetic chain, causing shoulder/medial arm pain, hand weakness, and Horner syndrome.
Obstruction of superior vena cava causing face/neck/upper extremity swelling, venous distention, dyspnea, orthopnea, and chest wall collateral veins.
Local tumor invasion at the thoracic inlet damages lower brachial plexus and cervical sympathetic pathways.
Mediastinal tumor, lymphadenopathy, or thrombosis blocks venous drainage from head, neck, upper limbs, and upper thorax.
Apical mass plus C8-T2 pain/weakness, ptosis, miosis, and anhidrosis points Pancoast syndrome.
Facial plethora, neck vein distention, upper extremity edema, dyspnea worse lying down, and dilated chest wall veins points SVC syndrome.
The trap
Both can come from lung cancer, so do not stop at “thoracic mass”; ask nerve symptoms versus venous congestion.
Watch it explained
The repair move
For apical/mediastinal lung cancer syndromes, separate brachial plexus-Horner findings from face/neck venous swelling.
Try a free question
CoreA patient with an apical lung mass has shoulder pain radiating down the medial arm, hand weakness, ptosis, miosis, and anhidrosis. Which syndrome is most likely?
Show answer and explanation
Answer: A. Pancoast syndrome. Pancoast syndrome comes from a superior sulcus tumor invading brachial plexus and sympathetic chain, causing arm pain/weakness and Horner findings.
Why the other choices are tempting
- B. SVC syndrome causes venous congestion: face/neck/upper extremity swelling and distended veins.
- C. PE causes pleuritic dyspnea and hypoxemia risk.
- D. Carotid dissection can cause Horner syndrome but not an apical lung mass with brachial plexus symptoms.
- E. Chronic bronchitis causes chronic productive cough.
Flashcards
Tap a card to flip it.
What is the fastest separator for Pancoast syndrome vs Superior vena cava syndrome?
Pancoast: apical tumor with arm pain and Horner syndrome; SVC syndrome: facial plethora, JVD, and upper-body edema from venous obstruction.
What clue should make you choose Pancoast syndrome?
Apical superior sulcus tumor invading brachial plexus and sympathetic chain, causing shoulder/medial arm pain, hand weakness, and Horner syndrome.
Quick answers
What is the fastest way to tell Pancoast syndrome from Superior vena cava syndrome?
Pancoast: apical tumor with arm pain and Horner syndrome; SVC syndrome: facial plethora, JVD, and upper-body edema from venous obstruction.
What is the key clue for Pancoast syndrome?
Apical superior sulcus tumor invading brachial plexus and sympathetic chain, causing shoulder/medial arm pain, hand weakness, and Horner syndrome.
What is the key clue for Superior vena cava syndrome?
Obstruction of superior vena cava causing face/neck/upper extremity swelling, venous distention, dyspnea, orthopnea, and chest wall collateral veins.
What is the common trap with Pancoast syndrome vs Superior vena cava syndrome?
Both can come from lung cancer, so do not stop at “thoracic mass”; ask nerve symptoms versus venous congestion.