Lung Imaging Reporting and Data System Category 4X

**Semantic type:** Classification

**Definition:** A Lung Imaging Reporting and Data System (Lung-RADS) category that indicates lung nodule(s) that are very suspicious based on high-risk imaging features, with a greater than 15% chance of malignancy. Management includes chest CT imaging with or without contrast, PET/CT imaging, or tissue sampling.

**Synonyms:** - Lung-RADS 4X - Lung-RADS Category 4X