Tumors

Question 1

Massive osteolysis

Answer 1

Gorham’s disease

Question 2

Most common long bone affected by intraosseous lipoma

Answer 2

Fibula

Question 3

Rugger-Jersey Vertebra

Answer 3

Renal osteodystrophy

Question 4

Picture-frame vertebra

Answer 4

Paget’s disease

Question 5

Arrange the following in order of frequency for bone metastasis:

Kidney, breast, lung, thyroid, prostate

Answer 5

PBKLT

Prostate > breast > kidney > lung > thyroid

Question 6

Common site for osseous metastasis in bronchogenic carcinoma

Answer 6

Terminal phalanges and metacarpal bones in hands

Question 7

This pattern of osseous metastasis is seen frequently in RCCA

Answer 7

Osteolytic

Question 8

2nd to plasma cell myeloma as primary malignant bone neoplasm

Answer 8

Osteosarcoma

Question 9

Juxtacortical Osteosarcoma in posterior distal femur (metaphyseal)

Answer 9

PAROSTEAL Osteosarcoma

Question 10

Juxtacortical Osteosarcoma anterior, medial or lateral of distal femur (diaphyseal)

Answer 10

PERIOSTEAL Osteosarcoma

Question 11

Most common benign tumor of the hand

Answer 11

ENCHONDROMA

Question 12

ENCHONDROMA leading to osseous expansion

Answer 12

ENCHONDROMA PROTRUBERANS

Question 13

Only site of enchondroma with no matrix

Answer 13

PHALANGES

Question 14

Enchondroma + vascular lesions

Answer 14

MAFUCCI SYNDROME

Question 15

Giant cell Tumor Criteria

Answer 15

Eccentric,

closed epiphysis,

abutting epiphysis,

well-defined with no sclerotic margins

Question 16

Worst type of chondrosarcoma with biomorphic features

Answer 16

DEDIFFERENTIATED CHONDROSARCOMA

Question 17

Nonossifying fibroma + extraskeletal congenital anomalies

rare and consists of multiple nonossifying fibromas (at least three) and extraskeletal congenital anomalies, including café au lait spots, mental retardation, hypogonadism or cryptorchidism, ocular abnormalities, and cardiovascular malformations.

Answer 17

JAFFE-CAMPANACCI SYNDROME

Question 18

Benign connective tissue tumor with trabeculated, soap bubble or honeycomb pattern

This rare benign neoplasm of bone is characterized by abundant collagen formation and the absence of both significant cellularity and pleomorphism.

Answer 18

DESMOPLASTIC FIBROMA

Question 19

Presentations of Neurilemoma (Nerve Sheath Tumor) (3)

Answer 19

Central cystic focus with sclerotic margin,

Dumbbell lesion,

Periosteal erosion or excavation