Pleomorphic Carcinoma Arising at Previous Resection Margins of Ground-Glass Opacities.

Pleomorphic carcinoma of the lung is highly malignant and occurs mostly in the upper lobes of smokers; however, no reports exist of new occurrences from the resection margins of the previous ground-glass opacities. In our case, a 73-year-old man underwent an initial partial resection of the left upper lung for ground-glass opacities, with progressive thickening of the resection margin during the following 10 months. Radical resection was performed, resulting in the diagnosis of a newly arising pleomorphic carcinoma from previously resected margins.