Situation: A 64-year-old man who has smoked 1 pack of cigarettes a day for 40 years is admitted with newly diagnosed small cell lung cancer. Chemotherapy with cisplatin and etoposide is planned. Two weeks later, the nurse notes these findings: Face, neck, and both arms: swollen; neck and upper chest veins distended Breathing: short of breath, worse when lying flat Back and legs: no back pain; leg strength and sensation normal Serum potassium: 4.2 mEq/L (3.5–5.0); serum calcium: 9.4 mg/dL (8.6–10.2) Which action should the nurse take?

Each option is the first action for a different oncologic emergency, so the findings must be matched first. Swelling of the face, neck, and arms with distended upper chest veins and orthopnea indicates superior vena cava syndrome; the normal back and leg examination, calcium, and potassium rule out the other emergencies. The nurse raises the head of the bed, gives oxygen, avoids arm lines where possible, and notifies the provider.

Clinical picture and first priority
This patient’s findings point to superior vena cava syndrome (SVCS). The swollen face, neck, and both arms, distended neck and upper chest veins, and shortness of breath that worsens when lying flat are classic signs of impaired venous return through the superior vena cava. In a man with newly diagnosed small cell lung cancer, the most likely cause is tumor compression or occlusion of the SVC ^[1][2]. The normal back and leg examination makes spinal cord compression unlikely, and the normal potassium and calcium levels rule out tumor lysis syndrome and hypercalcemia as the immediate problem. The first nursing action is to reduce venous congestion and support oxygenation: raise the head of the bed and give oxygen as ordered.

Why the other options do not fit
Each option is the first action for a different oncologic emergency. Watch out! Matching the findings to the correct emergency is the key to choosing the right first action.

Finding in this patient	Oncologic emergency it suggests	Correct first action
Face, neck, arm swelling; distended upper chest veins; orthopnea	Superior vena cava syndrome	Elevate head of bed, give oxygen, notify provider
Back pain, leg weakness, sensory loss	Spinal cord compression	Keep flat, log-roll, urgent spine imaging
Hyperkalemia, hyperphosphatemia, hypocalcemia, rising creatinine	Tumor lysis syndrome	Cardiac monitoring, IV fluids, hold potassium
Hypercalcemia with confusion, constipation, polyuria	Hypercalcemia of malignancy	IV saline, bisphosphonate

This patient has no back pain and normal leg strength and sensation, so spinal cord compression is not supported. The potassium is 4.2 mEq/L and calcium is 9.4 mg/dL, both within normal limits, so tumor lysis syndrome and hypercalcemia are not the current problem. Therefore, cardiac monitoring with potassium restriction, flat positioning with log-rolling, and IV saline with bisphosphonate are not the priority actions here.

Pathophysiology of SVCS
The superior vena cava is a thin-walled, low-pressure vessel that returns blood from the head, neck, upper extremities, and upper thorax to the right atrium. When a tumor compresses or invades the SVC, venous return is obstructed. This raises venous pressure upstream, producing edema of the face, neck, and arms, distended veins in the upper chest and neck, and respiratory symptoms. Lying flat worsens the obstruction because gravity no longer assists venous drainage, which explains the orthopnea ^[1]. Elevating the head of the bed uses gravity to reduce venous congestion and ease breathing. Oxygen helps correct any hypoxemia from impaired gas exchange or airway edema.

Nursing management priorities
SVCS is considered a relative medical emergency because severe obstruction can progress to laryngeal or cerebral edema ^[1][2]. Nursing care focuses on supporting breathing and reducing pressure in the upper body. Key point! Elevate the head of the bed, administer oxygen as ordered, and notify the provider promptly. Additional measures include avoiding venipuncture or IV lines in the arms when possible, because impaired venous return makes arm veins poor access sites and increases the risk of complications ^[1]. Fluid management may include diuretics or corticosteroids as part of the medical plan, but the nurse’s immediate independent and ordered actions center on positioning and oxygenation ^[2].

Why small cell lung cancer matters
SVCS is primarily associated with small cell lung cancer ^[1]. Small cell carcinoma often arises centrally in the chest, near the SVC, and grows rapidly. This anatomic location explains why SVCS can appear early in the disease course, sometimes even before the cancer diagnosis is confirmed. Because small cell lung cancer is generally chemosensitive, chemotherapy with cisplatin and etoposide may help shrink the tumor and relieve the obstruction over time, but the immediate nursing priority remains supportive care for respiratory and venous congestion ^[1][2].