A 50-year-old patient presents with a lesion in the midline involving the sacrum. It is found to be sclerotic. What is the most probable diagnosis -
Sclerotic lesion involving midline in the sacrum is likely to be chordoma.
It occurs most commonly at either end of notochord(midline) in following locations


Sacrococcygeal region
Clivus
Suprasellar region
Metastatic
Chordoma
Osteosarcoma
Chondrosarcoma