aetiology

Definition

Injury to ulnar collateral ligament of thumb MCPJ

Interferes with pinch grip and grasp and thumb is ineffective as a post

Femoral Neck Stress Fractures

Aetiology

Athletes with increase activity / distance

Women with eating disorders /  amenorrhea

Types

Compression / inferior neck

- < 50% protective weight bear

- > 50% emergent ORIF

Tension side / superior neck

- emergent ORIF

Epidemiology

Middle age men

Steroids / Growth Hormone

Aetiology

Usually occurs in gym

Bench Press

Clinical

Significant bruising in the acute phase

In chronic setting, ask patient to adduct against hip / resistance

Epidemiology

Ranges

- up to 4%

Clinical

Focal pain

- typically anterolateral thigh

- often tender

- corresponds to tip of stem

Aetiology

1.  Instability

Types

- early

- late / failed bony ingrowth

Cause

- micromotion at distal stem

Epidemiology

Uncommon

- dancers

- athletes

Aetiology

Hyperdorsiflexion of the MTPJ

Pathology

MT head dislocates plantar

- may buttonhole through capsule

- can prevent closed reduction

Blocks to Reduction

1.  Sesamoids

2.  Conjoint tendon

3.  Intersesamoid Ligament

Definition

Chronic, non metabolic bone disorder

Characterised by increased bone resorption, bone formation and remodelling

Epidemiology

Rare < 40

1 – 3 % population over 60

M > F

Aetiology

Unknown

Paramyxovirus implicated

- measles

- RSV

- canine distemper virus

Electron Microscope

Definition

Radius rotates externally in relation to the ulna

- posterior displacement of the radial head relative to the capitellum

- in flexion

Anatomy LCL

Aetiology

Throwing injury

- seen in the throwing athlete

- repetitive microtrauma / valgus stress

- develop laxity

History

Initially

- lose velocity / accuracy

Develop medial pain

40% ulna nerve symptoms