Question

a 62-year-old female patient presents with chief complaint of right shoulder pain. you note swelling overlying the right shoulder which the patient says has been enlarging for \a few months\. radiographic examination of the region reveals a grossly destructive permeative osteolytic lesion with arcs and rings pattern of calcification extending from the bone and into the soft tissues. what is the diagnosis? a) fibrosarcoma b) multiple myeloma c) osteosarcoma d) chondrosarcoma

Explanation:

The key radiological finding here is a destructive osteolytic lesion with arcs and rings calcification (chondroid matrix calcification) extending into soft tissues, along with a slow-growing swelling. Fibrosarcoma typically lacks this specific calcification pattern. Multiple myeloma presents with multiple punched-out lytic lesions, not this chondroid calcification. Osteosarcoma is more commonly associated with sunburst periosteal reaction and osteoid matrix, not arcs/rings calcification. Chondrosarcoma, a cartilage-forming sarcoma often seen in older adults, characteristically shows this arcs and rings pattern of calcification from chondroid differentiation, along with destructive bone lesions and soft tissue extension.

Answer:

D) chondrosarcoma