This case illustrates the presentation of melanoma as large bilateral lung masses. It is interesting to note the rounded appearances of the lung masses, which are also large and have central necrotic areas. Also, the absence of mediastinal nodal disease and the isolated left pelvic sidewall metastasis would be atypical for a lung primary. 

The diagnostic was confirmed with a CT-guided lung biopsy of the left lower lobe lesion. The patient had a previous history of melanoma treated years ago.