Bones, Joints, Soft Tissues

Question 1

Symmetric skeletal sclerosis d/t impaired osteoclast function. Absence of medullary canal and Erlenmeyer flask deformity

Answer 1

Osteopetrosis (Marble bone disease/ Albers-Schönberg disease)

Question 2

Type of osteoporosis with thin perforated trabecular plates with loss of interconnections

Answer 2

Postmenoposal osteoporosis

Question 3

Type of osteoporosis with thinned cortez with subperiosteal and endosteal resorption. Widened haversian system

Answer 3

Senile osteoporosis

Question 4

Mosaic pattern of lamellar bone with jigsaw puzzle appearance. Leontiasis ossea, platybasia, and chalkstick-type fractures

Answer 4

Paget bone disease

Question 5

Avascular necrosis of ossification centers in children

Answer 5

Legg-Calvé-Perthes disease

Question 6

Small intraosseous abscess in osteomyelitis

Answer 6

Brodie abscess

Question 7

Common cause of pyogenic osteomyelitis in patients with sickle cell anemia

Answer 7

Salmonella

Question 8

Benign bone-forming tumors that present with nocturnal pain relieved by aspirin

Answer 8

Osteoid osteoma (

Question 9

Most common malignant bone tumor commonly located in the metaphysis of long bones (50% around the knees)

Answer 9

Osteosarcoma

Question 10

Big bulky hemorrhagic tumors that appear as Codman triangles and sunbursts on radiographs. Cells in lace-like patterns.

Answer 10

Osteosarcoma

Question 11

Benign cartilage-capped tumor that is attached to the underlying skeleton by a bony stalk(exostosis)

Answer 11

Osteochondroma

Question 12

Sheets of compact polyhedral chondroblasts with CHICKEN-WIRE PATTERN of mineralization

Answer 12

Chondroblastoma

Question 13

Second most common malignant bone tumor composed of malignant hyaline and myxoid cartilage with anaplastic chondrocytes

Answer 13

Chondrosarcoma

Question 14

Most common form of skeletal malignancy

Answer 14

Metastatic

Question 15

Bamboo spine deformity

Answer 15

Ankylosing spondylitis

Question 16

Sausage-shaped DIP joints. Pencil-in-cup deformity on radiographs

Answer 16

Psoriatic arthritis

Question 17

Arthritis with negatively birefringent monosodium urate crystals

Answer 17

Gouty arthritis

Question 18

Arthritis with positively birefringent calcium pyrophosphate crystals

Answer 18

Pseudogout

Question 19

Most common inherited disorder of connective tissues characterized by blue sclerae, hearing loss and dental imperfection.

Answer 19

Osteogenesis imperfecta (brittle bone disease)