UE
Muscular Dystrophy
Limb length and congenital conditions
100

What is Little League shoulder?

Widening of proximal humeral physis in young pitcher.

100

What is Duchenne Muscular Dystrophy?

X-linked disorder with absent dystrophin.

100

What is true limb length?

ASIS to medial malleolus measurement.

200

What is AC joint sprain?

Fall onto shoulder causing Grade I–III injury.

200

What lab finding suggests DMD?

Elevated CK 50–100x normal.

200

When is no treatment needed?

Discrepancy 0–2 cm.

300

What is internal impingement?

Repetitive throwing causing labral injury.

300

What is the hallmark of MD?

Progressive proximal muscle weakness.

300

What is Ilizarov limb lengthening?

Distraction at 1 mm/day using external fixator.

400

What are overuse shoulder/elbow injuries?

Excessive pitch counts increase risk of this.

400

What is Becker Muscular Dystrophy?

Dystrophin abnormally low but present.

400

When is prosthetic fitting indicated?

>20 cm discrepancy.

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