Which symptom is associated with Klumpke's palsy?

In the context of Klumpke's palsy, Horner's syndrome is indeed a symptom associated with this condition. Klumpke's palsy results from an injury to the lower trunk of the brachial plexus, typically occurring during childbirth or traumatic incidents. This injury can also affect the sympathetic nerves that supply the eye, leading to Horner's syndrome.

Horner's syndrome is characterized by a triad of symptoms: ptosis (drooping of the upper eyelid), miosis (constricted pupil), and anhidrosis (lack of sweating) on the affected side of the face. In patients with Klumpke's palsy, the involvement of sympathetic fibers in conjunction with the injury to the brachial plexus can lead to these symptoms, hence establishing the connection between Klumpke's palsy and Horner's syndrome.

Other symptoms of Klumpke's palsy typically include hand weakness and atrophy, particularly affecting the intrinsic muscles of the hand, which can lead to a loss of finger abduction or weakness of wrist flexion. However, the defining association with Horner's syndrome specifically highlights the broader neuroanatomical implications of this type of brachial plexus injury.