MSK

Question 1

soap bubble appearance at the epiphysis of a bone

Answer 1

Giant cell tumor (aka osteoclastoma)

benign

Question 2

lateral projection of the metaphysis, has a cartilagenous cap

Answer 2

osteochondroma (aka exostosis)

benign

Question 3

Codmans triangle, sunburst pattern

Answer 3

osteosarcoma
bimodal age: young: Retinoblastoma
old: hx of radiation or paget’s diseaes
agressive, malignant

Question 4

onion skinning; 11;22 translocation

Answer 4

Ewing’s sarcoma
young men, likes the diaphysis
small blue cells
malignant

Question 5

glistening mass in the medullary cavity

Answer 5

chondrosarcoma
malignant
middle aged man

Question 6

Rotator Cuff muscles and their function

Answer 6

Supraspinatus: abduction of the arm
Infraspinatus: external rotation
Teres minor: external rotation
Subscapularis: internal rotation

Question 7

McMurrays test: how do you do it? (+) indicates what?

Answer 7

Fully flex the knee, then slowly extend with tibial torsion.

(+): palpable or audible click
indicates meniscal tear

Question 8

(+) Lachman’s test?

Answer 8

ACL tear

pull up on the tibial while stabilizing the femur

Question 9

Osteoporosis defined?

tx?

Answer 9

Osteoporosis: T score (from DEXA scan) more than 2.5 SD below normal

tx: 1. Vit D and Calcium
2. Bisphosphonates (–dronate)

Question 10

What do Bisphosphonates end in?

Answer 10

–dronate

Question 11

Osteoporosis vs. Osteopenia

Answer 11

Osteoporosis: T score (from DEXA scan) more than 2.5 SD below normal
Osteopenia: T score between 1-2.5 SD below average

Question 12

Hypothyroidism is associated with this MSK condition

Answer 12

carpal tunnel syndrome

tends to retain mucopolysaccharides in tissue

Question 13

2 things that make lumbar spinal stenosis worse?

2 mc causes?

Answer 13

caused by hypertrophy of ligamentum flavum or osteophytes at the facet joints

exacerbated by walking and extension