Curious Case of Unexplained Dyspnea With Malignancy.

A 48-year-old female never smoker with hypothyroidism and no significant prior respiratory complaints presented with 1 month of gradually worsening dyspnea on exertion. She denied any associated fevers, chills, weight loss, chest pain, productive cough, hemoptysis, or sick contacts. She was recently diagnosed with stage IV triple negative adenocarcinoma of the breast and was yet to receive chemotherapy.