Background: Malignant chest wall mass lesions are consider rare, it represent only 5% of the thoracic neoplasm, they divided into primary and secondary according to their origin, primary masses originates from osseous, soft tissue, cutaneous or nerve sheath, while the secondary mass lesions occur as direct invasion from lung or breast masses, metastasis from distant tumors, it can be part of systemic disease such as lymphoma or as a complication or radiation.

Aim: To evaluate the role of imaging in diagnosis, prognosis and follow up of patients with malignant chest mass lesions, discuss the radiological characteristics of different chest mass lesions and determine if representing malignant or benign lesion.