Clinodactyly

Definition

 

Clinodactyly is a fixed abnormal deviation of the finger

- in the coronal or radioulnar plane

 

Typically affects the middle phalanx of the fifth finger

- produces a radial angulation of the distal interphalangeal joint.

 

Normal if < 10-20°

 

Types

 

Primary

 

Usually little finger

- common

- AD & sporadic forms

 

80% syndromic

- Down's

- fetal alcolohol syndrome

 

M > F

 

Secondary / Delta Phalanx 

 

Commonest cause

- trapezoid shaped P2

- cosmetic problem only

 

Management

 

Primary clinodactyly 

 

Indication

- when fingers overlap 

 

Management

- closing wedge osteotomy of P1

 

Secondary / Delta Phalanx

- see additional notes