The Evolving Context of Driver Mutations: ROS1 Rearrangement in Metastatic Non-Small Cell Lung Cancer

Area of Science:

• Oncology
• Cardiology
• Pulmonology

Background:

• A 30-year-old Filipino woman with no significant past medical history presented with dyspnea and cough.
• She denied constitutional symptoms but had bilateral pleural and pericardial effusions on investigation.

Observation:

• Pericardial fluid drainage revealed atypical carcinoma cells.
• Imaging showed no obvious lung lesions or masses, suggesting a non-pulmonary primary source or early-stage disease.

Findings:

• The patient was a young, non-smoker with no family history of cancer.
• Past medical history included an embryonic pregnancy and a benign breast cyst.

Implications:

• This case underscores the importance of considering malignancy in young patients presenting with unexplained effusions, even without typical risk factors.
• Further investigation is crucial to determine the primary tumor site and guide appropriate treatment strategies.