A 65-year-old male presents with dull, aching pain in his hip for several months. X-rays show a large, destructive lesion in the proximal femur with a 'popcorn' or 'rings and arcs' calcification pattern. Which of the following is the most likely diagnosis?

Explanation

Chondrosarcoma is a malignant tumor of cartilage, typically affecting older adults (over 40-50 years old), often found in the pelvis, proximal femur, or shoulder girdle. The characteristic radiographic feature is the presence of chondroid matrix calcification, described as 'popcorn' or 'rings and arcs' pattern. Osteosarcoma is more common in adolescents and young adults. Metastatic carcinoma can be lytic or blastic but usually lacks specific chondroid calcifications. Multiple myeloma presents as 'punched-out' lytic lesions without periosteal reaction or specific calcification patterns.