A 12 year old girl complains of pain persisting in his left leg. For several weeks

A 12 year old girl complains of pain persisting in his left leg. For several weeks with a low grade fever. A radiograph reveals a mass in the diaphyseal region of the left femur with overlying cortical erosion and soft tissue extension. A biopsy of the lesion shows numerous small round cells, rich in PAS positive diastase sensitive granules. The most likely histological diagnosis is 

1. Osteogenic sarcoma.


2. Osteoblastoma.


3. Ewing's sarcoma.


4. Chondroblastoma.


Ans 3 


(PAS positive diastase resistant granules seen in Hereditary haemocromatosis in Liver biopsy)