43-Year-Old Man Presents With a Skin Lesion & Lung Mass

A 43-year-old man presents with a dark, irregular lesion on his back. Further work up reveals the presence of a mass in the right upper lobe in his lung. Sections of the skin and lung lesions are shown, respectively. What is your diagnosis?

A 43-year-old man presents with a dark, irregular lesion on his back.  Further work up reveals the presence of a mass in the right upper lobe in his lung.  Sections of the skin and lung lesions are shown below, respectively.

What is your diagnosis?