A 54-year- old, female nonsmoker was referred for evaluation of a chest mass. The mass was discovered on radiographic evaluation for flu symptoms during an emergency department visit. The patient reported a 1-year anterior left rib discomfort, which was believed to be musculoskeletal. The patient denied dyspnea, cough, wheezing, sputum production, hemoptysis, fever, or weight loss. A review of other systems revealed cold-related hand pain and insomnia. Her medical and surgical history included anxiety, oophorectomy for ovarian cysts, and ganglion cyst excision. There was no relevant occupational history. Her physical examination, pulmonary function test, and basic laboratory results were unremarkable.