A patient with Ewing’s sarcoma. Histology shows small round cells. These cells are filled with which of the following –
Correct Answer: Glycogen
Description: Ewing sarcoma
It is the second most bone sarcoma in children (after osteogenic sarcoma).
It is primary malignant small round cell tumor of bone.
It is derived from primitive neuroectoderm.
Age → 10-15 years, Sex → M > F
Usually arises in the diaphysis
Femur & Tibia → 2/3rd
Flat bones of pelvis → 3/3rd
Important microscopic features
Scant cytoplasm in tumor cells which is clear because it is rich in glycogen.
Homer - Wright rosettes.
Important Radiological features
Onion-skin periosteal reaction.
Sun-rays appearance (more common in osteogenic sarcoma).
Codman's triangle (It is also more common in osteogenic sarcoma).
Category:
Pathology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now