The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 9 year old boy presenting with lytic lesion on midshaft tibia. On HPE, there are grooved nuclei, giant cells eosinophilic cytoplasm and fibroblastic proliferation. Xray is as shown below. What is the likely diagnosis?   (A) Langerhans cell histiocytosis   (B) Giant cell tumor   (C) Chondroblastoma   (D) Osteoid osteoma
['(A) Langerhans cell histiocytosis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Langerhans cell histiocytosis \n (B) Giant cell tumor \n (C) Chondroblastoma \n (D) Osteoid osteoma <> possible answers', '  A 9 year old boy presenting with lytic lesion on midshaft tibia. On HPE, there are grooved nuclei, giant cells eosinophilic cytoplasm and fibroblastic proliferation. Xray is as shown below. What is the likely diagnosis? <> context@']