A 75-year-old woman with left breast cancer (2014), status post left modified radical mastectomy and chemoradiotherapy under follow-up. PET-CT showed a hypermetabolic pulmonary nodule with 13.8 SUV in the left lung, then referred to our department.

A solitary pulmonary nodule in the left lung without evidence of adenopathy. The nodule exhibited pleural indentation along the adjacent fissure. The lesion was suspected to be either primary lung cancer or pulmonary metastasis. A percutaneous lung biopsy showed that the nodule was metastatic (from breast cancer), the patient received systemic chemotherapy and is currently alive with good response and under follow up.

On CT, 46% of the solitary pulmonary nodules detected in patients with extrapulmonary malignancies were proved to be a metastasis at histopathological examination.