Condition	Characteristics
Carcinoma	Primary: usually spiculated, not calcified; metastatic: usually round, multiple, not calcified
Fungal granuloma	Round or oval, often multiple nodules; usually calcified; often with calcified hilar nodes
Hamartoma	Lobulated, well circumscribed; 10 to 20 percent have “popcorn” calcification; finding of fat within is pathognomonic
Radiographic artifacts	Physical examination and repeat film to clarify bone and skin lesions; lesion visible on both posterior-anterior and lateral views
Tuberculoma	Central calcification and “satellite” lesions, usually with calcification of hilar lymph nodes