Questions:

Question 1

T/F? Sexual precocity is rare in females

Answer 1

False 30% of females with FD suffer from Albrights syndrome. Sexual precocity is rare in males

Question 2

T/F? Expanding focal rib lesions are characteristic of FD

Answer 2

True. FD is the commonest cause of such lesions.

Question 3

T/F? Re enchondroma of bone: Typically calcifies.

Answer 3

True

Question 4

Re enchondroma of bone: Are found in Maffucci syndrome

Answer 4

True Maffucci syndrome is enchondroma with soft tissue haemangioma

Question 5

Fluid fluid level on CT

Answer 5

GCT ABC and solitary bone cyst and telangiectatic osteosarcoma.

Question 6

Lytic lesion in distall femur, does not reach the articular surface and has a fluid fluid level

Answer 6

ABC GCT abuts the articular surface

Question 7

? Diagnosis Multiple NOF, cafe au lait spots , mental retardation, hypogonadism and cardiac malformation

Answer 7

Jaffe Campanacci Syndrome

Question 8

Location of baker’s cyst

Answer 8

between semimembraneous and MEDIAL head of gastric

Question 9

Discoid meniscus is a normal varian of the …… meniscus

Answer 9

lateral meniscus and is prone to tear.

Question 10

Double PCL sign and intact ACL

Answer 10

Bucket handle tear

Question 11

? diagnosis T2/STIR: celery stalk appearance T1: Drumstick

Answer 11

ACL mucoid degeneration Predisposes to ACL ganglion cyst

Question 12

5 distinct manifestations of Psoriatic arthropathy:

Answer 12

1. Oligoarthritis 2. Polyarthritis (usually DIP) 3. Symmetric type 4. Arthritis mutilans 5. Spondyloarthropathy

Question 13

Pencil in cup deformity and telescoping of the joints

Answer 13

Psoriatic arthropathy that

Question 14

Diagnosis? Wide bones with thick trabecula

Answer 14

Pagets

Question 15

The typical radiographic appearance of this lesion is circumferential calcification with a lucent centre and a radiolucent cleft (string sign) that separates the lesion from the cortex of the adjacent bone.

Usually post traumatic

Answer 15

myositis ossificans

fluid fluid level due to previous haemorrhage.

Question 16

Exess and deficiency of Vit D causes?

Answer 16

hypervitaminosis D is rare and leads to hypercalcaemia:

• Facilitating calcium deposition in soft tissues, such as the arteries and kidneys.

hypovitaminosis D:

• paediatric: rickets
• adult: osteomalacia

Question 17

This has a typical appearance on plain radiographs with amorphous and multilobulated (“cloud-like”) calcification located in a periarticular distribution.

Answer 17

Tumoral calcinosis

Juxta-articular cystic lesions filled with calcium fluid

Defect in Phosphate met - Ca is normal

Question 18

There is focal areas of symptomatic perineural fibrosis around a plantar digital nerve of the foot. The condition is thought to be due to chronic entrapment of the nerve by the intermetatarsal ligament.

Answer 18

Morton Neuroma

The 3rd web-space (between 3rd and 4th metatarsal heads) is the most commonly affected site.

10% bilateral

Question 19

MRI findings of morton neuroma

sign associated with this condition

Answer 19

Dumbbell/ovoid-shaped lesion at a similar position to that described on ultrasound:

• T1: typically low-to-iso signal
• T2: typically low signal but can sometimes be intermediate in signal
• T1 C+ (Gd): tends to show intense enhancement

A sonographic Mulder sign may be elicited with the probe.

_{T1 +Gd FS}

Question 20

Diagnosis?

• bone within a bone appearance
• Erlenmeyer flask type deformity of the tubular bones
• sandwich vertebrae: diffuse end plate sclerosis (peripheral bony sclerosis) and lucency of the centre of vertebral body
• alternating radiolucent metaphyseal bands

Answer 20

Osteopetrosis

Question 21

Diagnosis? What are the typical findings?

Answer 21

Osteopetrosis

1. bone within a bone appearance
2. Erlenmeyer flask type deformity of the tubular bones
3. sandwich vertebrae: diffuse end plate sclerosis (peripheral bony sclerosis) and lucency of the centre of vertebral body
4. alternating radiolucent metaphyseal bands

Question 22

PVNS findings

Answer 22

• Joint effusion
• Ca is rare- Ca excludes PVNS
• Low signal on all MR seq and BLOOMING

Question 23

The usual mechanism of this injury is falling onto outstretched hand in ulnar deviation

Or…

Direct blow to dorsum of the hand

Answer 23

Triquetrel fracture.

Scaphoid Fracture is more common in FOOSH and radial deviation

Question 24

35F. Pain in the hands and wrists. History of Rheumatic fever and SLE

Answer 24

Jaccoud arthropathy

• non-erosive arthropathy
• ulnar deviation of the 2-5th fingers with metacarpophalangeal (MCP) joint subluxation.
• post-rheumatic fever.
• in association with
  
  • systemic lupus erythematosus (SLE)
  • psoriatic arthritis,
  • inflammatory bowel disease and
  • malignancy.

It is thought to be related to ligamentous laxity.

Question 25

What features would be suggestive of Fe deficiency anaemia 1. Narrowing of deploe 2. Hair on end skull 3. osteopenia of zygoma 4. osteosclerosis of sphenoid 5. biconcave vertebra

Answer 25

Hair on end skull ## Footnote widening of diploe OP in long bones

Question 26

45F foot pain and difficulty walking and swelling along the medial malleolus and arch of foot. What tendon is most likely to have been injured?

Answer 26

Tibialis posterior

Question 27

Assualt to face: unable to open his mouth. Severe bruising and flattening of the contour of his cheek. Diagnosis? 1. Zygomatic arch fracture 2. Le Fort I 3. Le Fort III 4. Coronoid process 5. Orbital blowout fracture

Answer 27

Zygomatic arch fracture

Question 28

X ray shows loss of lamina dura of majority of teeth. What is the possible cause? 1. osteopetrois 2. hypoPTH 3. Scleroderma 4. Sickle cell 5. Myeloma

Answer 28

Scleroderma Other causes include: * Cushing * pagets * hyperPTH * OP * osteomalacia * leukaemia * mets * LCH

Question 29

Which of the following lesions would appear as HOT on bone scan? 1. Osteopoikilosis 2. FCD 3. Acute fracture 4. FD 5. Haemangioma

Answer 29

Fibrous dysplasia Other causes: * Pagets * Brown tumour * ABC * Chondroblastoma * Ostoid osteoma