Osteoma and Osteoid Osteoma

Which age group is affected by Osteoma?

Children
Old-aged people
Adults (correct)
All age groups

What is the typical location of Osteoma?

Spine
Long bones
Facial bones (skull, jaws, and paranasal sinuses) (correct)
Pelvis

What is the clinical picture of Osteoma?

Fever, fatigue, and weight loss
Swollen lymph nodes and night sweats
Severe pain relieved by aspirin
Local mechanical problems, sinus obstruction, visual defects, and cosmetic deformity (correct)

What is the characteristic radiological feature of Osteoid Osteoma?

Radiolucent center (nidus) surrounded by dense sclerotic bone (D) Signup and view all the answers

What is the cause of severe pain in Osteoid Osteoma?

Tumor cells secreting Prostaglandin E2 (C) Signup and view all the answers

What is the typical size of an osteoblastoma?

Larger than 2 cm (B) Signup and view all the answers

What is a key feature of osteoblastoma on a CT scan?

Highly vascular stroma with osteoid bone and multinucleated giant cells (A) Signup and view all the answers

What is the age range for primary osteosarcoma?

20 years (B) Signup and view all the answers

What is a key difference between osteoblastoma and osteosarcoma?

Presence or absence of sclerosis (B) Signup and view all the answers

What is the most common type of primary malignant tumor of bone?

Osteosarcoma (C) Signup and view all the answers

What is the typical location of an osteoid osteoma in a long bone?

Metaphysis (B) Signup and view all the answers

What is the cause of severe pain in osteoid osteoma?

Prostaglandin E2 (D) Signup and view all the answers

What is the characteristic radiological feature of osteoid osteoma?

Radiolucent center (nidus) surrounded by dense sclerotic bone (D) Signup and view all the answers

What is the microscopic feature of the central nidus in osteoid osteoma?

Vascularized fibroconnective tissue surrounded by interlacing trabeculae of woven bone (A) Signup and view all the answers

What is the characteristic of the periphery of the lesion in osteoid osteoma?

Dense reactive bone (aclerosis) (A) Signup and view all the answers

What is the typical appearance of osteosarcoma on a radiology exam?

Destructive, mixed lytic and sclerotic mass with infiltrative margins (C) Signup and view all the answers

What is the name of the triangular area of new bone formation that is characteristic of osteosarcoma?

Codman triangle (C) Signup and view all the answers

What is the typical histological appearance of osteosarcoma?

Sarcomatous mass with hemorrhage and necrosis (C) Signup and view all the answers

What is the term for the sunray appearance seen in osteosarcoma?

Sunray appearance (D) Signup and view all the answers

What is the shape of the osteosarcoma mass described in the text?

Siform (B) Signup and view all the answers

What is the characteristic pattern of osteoid matrix deposition in osteosarcoma?

In a lace-like pattern (A) Signup and view all the answers

What is the characteristic feature of the tumor cells in osteosarcoma?

Large, hyperchromatic nuclei (A) Signup and view all the answers

What is the characteristic radiological feature of osteosarcoma?

Fusiform mass with hemorrhage and necrosis (C) Signup and view all the answers

What is the characteristic soft tissue involvement in osteosarcoma?

Infiltration of soft tissue around the medullary cavity (A) Signup and view all the answers

What is the category of tumors that includes osteosarcoma?

Cartilage forming tumors (C) Signup and view all the answers