Quiz Case #4
A 16-year-old male was seen in consultation for a painful lesion of the proximal humerus.
Plain film showing a
in the proximal humeral
Biopsy specimen, low magnification
Q1. What is your diagnosis?
Osteosarcoma, high grade
Osteosarcoma, well-differentiated (low-grade)
Q2. What is the distinguishing and diagnostic feature of this tumor?
Highly pleomorphic mesenchymal cells
Characteristic chromosomal abnormality
Q3. Prognosis depends on
Tumor response to pre-operative chemotherapy
Skeletal site of involvement
All of the above
This is a self-assessment test. The results are neither collected nor stored.