Osteosarcoma usually presents with pain at night and precedes tumour by weeks or months. Some times there may be only a history of a tired feeling, a slight limp or a history of trauma. Our case did not have any symptoms at all until two weeks before the presentation. The fracture made the tumour extra compartmental and led to metastasis and poor prognosis. We should always aware of this possibility of rare presentation when we see a preadolescent patient with increasing pain following fracture.