O: Benign MSK Swellings

Question 1

what are the 5 types of benign swellings found in MSK system?

Answer 1

Baker’s cyst, bursitis, sebaceous cysts, myositis ossificans, abscess

Question 2

what is Baker’s cyst

Answer 2

fluid filled cyst in popliteal fossa

Question 3

aetiology of Baker’s?

Answer 3

Osteoarthritis association

Question 4

s/s of Baker’s?

Answer 4

can appear as general fullness of popliteal fossa, non-tender

Question 5

mx of Baker’s

Answer 5

leave alone or rupture

Question 6

what is Bursitis?

Answer 6

inflammation of synovial lined sacs that protect bony prominences and joints

Question 7

commonest sites of bursitis?

Answer 7

knee and trochanter

Question 8

mx of bursitis

Answer 8

NSAIDs, rest, bursal resection in chronic cases

Question 9

main complication of bursitis?

Answer 9

infection and abscess formation- mx is drainage/ abx

Question 10

what is a sebaceous cyst?

Answer 10

cyst found in hair follicle areas

Question 11

histology of sebaceous cyst?

Answer 11

caseous material

Question 12

s/s of sebaceous cyst?

Answer 12

mobile discreet swelling

Question 13

what is myositis ossificans?

Answer 13

abnormal calcification within muscle

Question 14

histology of myositis ossificans?

Answer 14

fibroblasts, cartilage, bone

Question 15

epi for myositis ossificans?

Answer 15

common in young active males

Question 16

aetiology of myositis ossificans?

Answer 16

direct trauma, intramuscular haematoma

Question 17

s/s of myositis ossificans?

Answer 17

hardiness developing over sight of injury couple days after trauma- swelling, dec ROM, tenderness

Question 18

x-ray findings of myositis ossificans?

Answer 18

peripheral bone formation with central Lucent area

Question 19

mx for myositis ossificans

Answer 19

observe, rest, exercises. can only intervene surgically once ossification is complete

Question 20

what is an abscess?

Answer 20

collection of pus

Question 21

mx of abscess

Answer 21

surgically drain