Soft tissue mass in the chest with rib erosion in X-ray is seen in all except -
Multiple myeloma, Ewing's sarcoma and parosteal osteosarcoma can cause rib lesion with adjacent soft tissue mass.
Leukemia does not cause rib lesion with adjacent soft tissue mass.
Leukemia
Ewing's sarcoma
Multiple myeloma
Osteosarcoma