74 year old female with a history of emphysema and tobacco abuse presented to the hospital with complaints of increasing shortness of breath and chest discomfort. The patient also noted some redness and swelling around her right breast. A mass could be palpated under her right breast.

CT of the chest was performed and revealed large mass in the right chest. The mass was eroding through the ribs and partially compressing the lung causing post-obstructive pneumonitis. The differential diagnosis included breast cancer or cancer originating from the lung.

CT guided needle biopsy was performed. Pathology report indicated that the patient had squamous cell carcinoma of lung origin.

Treatment options were discussed with the patient. The patient opted for hospice and palliative care.