Brachial Plexus Palsies

Question 1

Erb’s Palsy

Nerve root

Clinical Features

Cause

Answer 1

Erb’s palsy involves the C5-6 nerve roots:

• with corresponding dermatomal sensory loss
• so-called “waiter’s tip” sign with shoulder adduction, elbow extension, forearm pronation and wrist flexion

It is most typically associated with shoulder dystocia and traumatic childbirth.

Question 2

Klumpke’s Palsy

Nerve root

Clinical Features

Answer 2

Klumpke’s palsy involves the C8-T1 nerve roots:

• with corresponding dermatomal sensory loss
• weakness of the intrinsic muscles of the hand.

Uncommonly, T1 involvement may also result in an ipsilateral Horner’s syndrome.

Question 3

Pancoast tumour compression

Nerve root

Clinical Features

Associated with

Answer 3

Associated with squamous cell carcinoma

Nerve root affects C8-T1

Ipsilateral horner’s syndrome