Lateral X-ray of left knee of an adolescent male is given below. What is the most probable diagnosis for this patient ?

Chondromyxoid fibroma The above knee x-ray shows sclerotic lesion around the coex in the tibia. Most of the chondromyxoid fibromas are located in the metaphyseal region of long bones, and may extend into the epiphyseal line and even rarely abut the aicular surface. Disease of adolescent. On X-ray - Small eccentric lytic lesion which lie parallel to the long axis of the bone. The tumor often erupts out through the coex. Bone cyst with fracture will show a larger lesion and is mostly unilateral.Osteitis Fibrosis cystica will present with multiple lesions and also has a history of abdominal groans, psychic moans and renal stones.Osteosarcoma is a malignant lesion usually occurs above the joint.