Tom is a seven year old boy who attends with his mother after noticing a lump on his right leg. Neither can recall any trauma history and Tom is normally fit and well. He denies any pain or altered sensation and is not aware of any other lumps/symptoms except for mild fatigue.
Examination reveals a bony swelling at the distal end of his right femur with no overlying skin changes. The swelling is firm and fixed to underlying structures. There is no palpable regional lymphadenopathy.
What is the next most appropriate course of action?