Subpleural Mass in 46-Year-Old Patient

July 7, 2016

A 46-year-old man presents with a cough and chest pain. Chest imaging shows a subpleural mass in his left upper lobe, and a biopsy is performed. What is your diagnosis?

A 46-year-old man presents with a cough and chest pain. Chest imaging shows a subpleural mass in his left upper lobe, and a biopsy is performed.

Based on the image shown, what is your diagnosis?