Bone tumors

Question 1

MC benign bone lesion

humerus and femur

< 20 yo

+ fallen leaf sign

Answer 1

UBC, unicameral bone cyst

Question 2

Blood filled cyst in bone

benign but aggressive

MC spine and extremities

Answer 2

aneurysmal bone cyst

Question 3

benign lesion

metaphyseal, eccentric, sclerotic borders

asymptomatic

Answer 3

Non-ossifying fibroma

Question 4

aggressive, benign tumor

develops in early adult hood

local pain

metaphysis and epiphysis

Answer 4

Giant cell tumor

Question 5

benign and small

dull achy pain

severe pain at night relieved c nsaids

nidus center

Answer 5

osteoid osteoma

Question 6

MC benign bone tumor

appears pedunculated on x ray

fixed, non-mobile near the joint

pain w/ activity

Answer 6

osteochondroma

Question 7

MC bone tumor in children

malignant

often asymptomatic

Answer 7

osteosarcoma, ewing sarcoma

Question 8

located at the epiphysis of hips shoulder pelvis

> 40 yo males

malignant

pelvic tumor radiates to hip/knee

Answer 8

chondrosarcoma

Question 9

MC primary bone tumor

involves entire skeleton

MC c males > 40, african american

assoc. c. radiation, pesticides, HIV

+ fatigue, night sweats

+ punched out appearance

+ bence jones proteins

Answer 9

multiple myeloma