Solitary lung cavities: CT findings in malignant and non-malignant disease.

•CT of solitary lung cavities can aid in the diagnosis of malignant conditions.•Malignant lesions tend to display thicker walls.•Non-malignant diseases exhibit more consolidations and centrilobular nodules.•Maximum wall thicknesses of 7 mm or 24 mm are indicative of non-malignant and malignant diseases, respectively.