What happened, in summary

A 54-year-old Malaysian woman who had never smoked developed a 3-week history of cough, low-grade fever, and shortness of breath. She was initially treated for pneumonia, but her symptoms did not improve as expected. Further imaging found blood clots in the lung, fluid around both lungs, and a large amount of fluid around the heart.

An emergency heart ultrasound showed that the fluid was compressing the heart. Doctors drained the fluid, removing 600 milliliters. Testing of that fluid unexpectedly found malignant adenocarcinoma cells. A later PET-CT scan showed a mass in the right upper lung that was strongly suggestive of a primary lung adenocarcinoma. It also showed widespread areas concerning for metastatic disease, including the pleura, pericardium, bones, adrenal glands, and tissue under the skin. The malignant pericardial fluid provided direct evidence that the cancer had spread.

She was referred for respiratory and oncology assessment, with a tissue biopsy planned to confirm the primary tumor and guide treatment. Before this could be completed, she developed hospital-acquired pneumonia followed by septic shock.

She died before cancer-directed treatment could begin.