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NYCC Bone & Joint > Lower Extremity Variants > Flashcards

Lower Extremity Variants Flashcards

1
Q

What are Harris growth arrest lines?

A

transverse radiopaque lines within the long metaphysis, representing points of resumed growth after it stopped

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2
Q

What condition are Harris growth arrest lines associated with?

A

Marfan’s syndrome

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3
Q

What is a bipartite patella?

A

extra ossification center located in the superolateral patella where part of patella does not fully heal along bony edges of patella (uncommon Fx site)

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4
Q

What is the treatment for a bipartite patella?

A

rest and rehab

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5
Q

What is Os fabella?

A

ossicle at posterior capsule of knee joint

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6
Q

What is Os cyamella?

A

ossicle at popliteus tendon insertion

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7
Q

What is Os trigonum?

A

ossification at Achilles tendon (junction of tibia, talus, & calcaneus)

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8
Q

What actions cause symptomatic cases of Os trigonum?

A

frequent plantarflexion which traps ossicle between calcaneus & tibia
(eg. sprinters, ballet dancers)

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9
Q

What is the clinical significance of an Os trigonum?

A

possible fatigue Fx

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10
Q

What is Os supranaviculare?

A

ossicle above the navicular bone

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11
Q

What is Os tibialis externum?

A

ossicle medial to navicular on tibial side of foot

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12
Q

What is Os peroneum?

A

ossicle on lateral side of foot, near the cuboid

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13
Q

What is Ludloff spot/triangle?

A

area of lucency in distal femur between medial and lateral femoral condyles
(can’t see on frontal view due to patella)

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14
Q

What is tarsal coalition?

A

congenital fusion within the tarsus

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15
Q

What are the 2 types of tarsal coalition?

A

bony or fibrous

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16
Q

What is the clinical presentation of tarsal coalition?

A

Sx related to pes planus or high arch

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17
Q

What are the most common forms of tarsal coalition?

A
  • calcaneonavicular
  • talocalcaneal
    (on lab exam just say tarsal coalition)
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18
Q

What radiographic sign is associated with calcaneonavicular tarsal coalition?

A

anteater sign

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19
Q

What radiographic sign is associated with talocalcaneal tarsal coalition?

A

C sign

20
Q

What is a talar beak?

A

developmental variant (not to be confused w/ hypertrophic spurring) adjacent to talonavicular joint

21
Q

What other diagnosis is likely if a talar beak is observed?

A

tarsal coalition

22
Q

What is hallux valgus?

A

proximal phalanx deviated laterally and first metatarsal head deviates medially

23
Q

What is the appearance of hallux valgus?

A

looks like a bunion

24
Q

What is the diagnosis?

A

Harris growth arrest lines

25
Q

What is the diagnosis?

A

Bipartite patella

26
Q

What is the diagnosis?

A

Bipartite patella

27
Q

What is the diagnosis?

A

Os fabella

28
Q

What is the diagnosis?

A

Os cyamella

29
Q

What is the diagnosis?

A

Os cyamella

30
Q

What is the diagnosis?

A

Os trigonum

31
Q

What is the diagnosis?

A

Os trigonum

32
Q

What is the diagnosis?

A

Os tibialis externum

33
Q

What is the diagnosis?

A

Os supranaviculare

34
Q

What is the diagnosis?

A

Os supranaviculare

35
Q

What is the diagnosis?

A

Os peroneum

36
Q

What is the diagnosis?

A

Os peroneum

37
Q

What is the diagnosis?

A

Os peroneum

38
Q

What is the diagnosis?

A

Ludloff triangle

39
Q

What radiographic sign would be present on a lateral view of this condition?

A

Anteater sign
(Calcaneonavicular Tarsal coalition)

40
Q

What is the diagnosis?

A

Tarsal coalition

41
Q

What is the diagnosis?

A

Tarsal coalition

42
Q

What radiographic sign is seen here?

A

C sign
(Talocalcaneal tarsal coalition)

43
Q

What is the diagnosis?

A

Talar beak

44
Q

What is the diagnosis?

A

Hallux valgus

45
Q

What is the diagnosis?

A

Brachymetatarsy

46
Q

What is the diagnosis?

A

Symphalangism

NYCC Bone & Joint (20 decks)

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