List To Memorise

Question 1

Monoarthritis

Answer 1

1. Septic arthritis
2. Trauma
3. OA
4. CPPD
5. Gout
6. Neuropathic/Charcot arthropathy
   - 7 D’s: degeneration, destruction, dislocation, deformity, debris, distension, increased density
7. AVN
8. Viral
9. PVNS pigmented villonodular synovitis
10. Synovial osteochondromatosis
11. Monoarticular presentation of a usually polyarticular arthritis

Question 2

Arthritis with osteopenia

Answer 2

1. RA
2. Septic arthritis
3. SLE
4. Systemic sclerosis (acroosteolysis)
5. Reactive arthritis
6. Juvenile idiopathic arthritis
7. Haemophilic arthropathy

Question 3

Arthritis with preservation of bone density

Answer 3

1. OA
2. CPPD
3. Gout
4. Seronegative spondyloarthropathies
5. Neuropathic arthropathy

Question 4

Arthritis with periosteal reaction

Answer 4

1. Seronegative spondyloarthropathies (fluffy appearance)
2. Septic arthritis
3. Juvenile idiopathic arthritis (most often seen around metacarpal/metatarsal)
4. HIV-associated arthritis

Question 5

Arthritis with preserved or widened joint space

Answer 5

1. Any early arthritis
2. Gout
3. Acromegaly
4. SLE
5. PVNS and primary synovial osteochondromatosis
6. Multi centric reticulohistiocytosis

Question 6

Arthritis with soft tissue nodules

Answer 6

1. RA
2. Gout
3. PVNS (synovial nodule)
4. Synovial chondromatosis
5. Sarcoidosis (periarticular granuloma = ‘lace like lytic lesion)
6. Amyloidosis (=
7. Multicentric reticulohistiocytosis

Question 7

Arthritis mutilans (destructive arthritis)

Answer 7

1. RA
2. Psoriatic arthritis
3. Neuropathic arthropathy
4. Juvenile idiopathic arthritis
5. Chronic reactive arthritis
6. Gout
7. Mixed connective tissue disease
8. Multicentric reticulohistiocytosis

Question 8

Acroosteosclerosis

Answer 8

1. Normal variant
2. psoriatic arthritis
3. Rheumatoid arthritis
4. Systemic sclerosis
5. Any cause of sclerotic bone lesion affecting terminal phalanx

Question 9

Intraarticular loose body

Answer 9

1. Trauma
2. Synovial osteochondromatosis (secondary to OA with chondral bodies)
3. Osteochondromatosis dissecan
4. Neuropathic arthropathy

Question 10

Condrocalcinosis

Answer 10

1. OA
2. CPPD
3. Hyperparathyroidism
4. Gout
5. Haemachromatosis
6. Acromegaly
7. Wilson’s disease
8. Alkaptonuria

Question 11

Sacroilitis

Answer 11

Bilateral symmetrical: AS, OA, enteropatic arthritis, hyperparathyroidism, osteitis condensans ilii, late bilateral asymmetrical disease

Bilateral asymmetric: psoriatic arthritis, chronic reactive arthritis, gout, early manifestation of bilateral symmetric disease

Unilateral: septic arthritis, early manifestation of bilateral disease

Question 12

Widening of pubic symphysis

Answer 12

1. Pregnancy
2. Trauma
3. Osteitis pubis (athletic, subchondral sclerosis/irregularity)
4. Septic arthritis
5. Inflammatory arthritis
6. hyperparathyroidism
7. Neoplasia (bladder cancer, lytic met)
8. Osteonecorsis (radiotherapy)

Question 13

Protrusio acetabuli

> 3 mm or > 6mm in M/F

Answer 13

1. Idiopathic
2. Trauma
3. RA
4. Bone softening eg: Paget’s osteomalacia, fibrous dysplasia
5. Chronic septic arthritis
6. Marfa/Ehlers-Danilo’s syndrome
7. Osteogenesis imperfacta

Question 14

Abnormal proximal femoral morphology

Answer 14

Coxa magna: DDH, SCFE, Perthes, Juvenile idiopathic arthritis, previous trauma/septic arthritis
Coxa plana: any cause of AVN
Coxa valga: neuromuscular disorder, prev femoral neck fracture, juvenile idiopathic arthritis, hereditary multiple exostoses, skeletal dysplasia
Coxa vara: DDH, SCFE, Perthes, prev fem neck fracture/septic arthritis, bone softening, idiopathic, skeletal dysplasia, proximal focal femoral deficiency

Question 15

Enlargement of distal femoral intercondylar notch

Answer 15

1. Juvenile idiopathic arthritis
2. Haemophilia
3. RA
4. Psoriatic arthritis
5. Post-op
6. Septic arthritis
7. Gout
8. PVNS
9. Synovial osteochondromatosis
10. Synovial haemangioma