What does it mean when the maximum CT value of a pulmonary nodule is 105 HU?

A lung nodule with a maximum CT value of 105 Hounsfield units (Hu) indicates high density, close to calcification or containing substantial dense components. Such nodules are mostly benign lesions, such as healed tuberculosis, inflammatory scars, or calcified nodules. However, further evaluation is still necessary to rule out rare malignant possibilities. It is recommended to seek prompt consultation at a respiratory medicine or thoracic surgery department.

CT value is a measure of tissue density—higher values indicate greater density. A value of 105 Hu falls within the high-density range and is commonly seen in calcified lesions formed after resolution of prior disease. These nodules are typically stable and carry an extremely low risk of malignancy. However, some mixed-density nodules containing calcified components may still raise concerns and require comprehensive assessment based on features such as size, shape, and margin characteristics.

Maintain a regular lifestyle, avoid smoking and exposure to dust or harmful gases, eat a balanced diet rich in vegetables and fruits to enhance immunity. Avoid excessive anxiety, follow medical advice for regular follow-up imaging or additional tests, and do not self-medicate or neglect scheduled monitoring.