Transient Horner's Syndrome: An Unusual Complication of Pneumothorax Treatment.

Horner's syndrome is a rare condition that results when there is an interruption of the sympathetic fibers that run from the stellate ganglion to the eye. The classic triad of Horner's syndrome includes unilateral ptosis, miosis, and anhidrosis. Spontaneous pneumothorax is a rare condition that occurs when there is a sudden collapsed lung without any direct cause.