A 79-Year-Old Woman With Advanced Lung Carcinoma and Bilateral Infiltrates.

Area of Science:

• Oncology
• Pulmonology
• Internal Medicine

Background:

• A 79-year-old female patient with a history of lung adenocarcinoma (EGFR exon 19 deletion) and metastatic disease to bone and brain.
• Patient was on osimertinib for 14 months and rivaroxaban for pulmonary embolism.
• No recent medication changes, antibiotic use, or exposure to toxins.

Observation:

• Presented with progressive dyspnea and severe hypoxemia over 3-4 weeks.
• Required oxygen supplementation.
• No significant changes in medical history or recent exposures noted.

Findings:

• The patient's symptoms suggest a potential complication related to her underlying condition or treatment.
• Differential diagnosis for hypoxemia in this context includes pulmonary embolism, infection, or treatment-related lung toxicity.
• Further investigation is needed to determine the exact cause of respiratory distress.

Implications:

• This case underscores the importance of considering diverse causes of respiratory symptoms in cancer patients.
• Highlights the need for vigilant monitoring for potential adverse events associated with targeted cancer therapies like osimertinib.
• Emphasizes the complexity of managing comorbid conditions, such as pulmonary embolism, in patients with advanced lung cancer.