A 72-year-old man presented to the office complaining of left shoulder pain. The patient has been feeling weakness in the left arm for the last month. Physical examination shows left-sided ptosis. The left pupil is smaller in diameter than the right, but both pupils are reactive. Extraocular movements are intact. This patient's symptoms are most likely due to disruption of which of the following structures?

Question

Quizplus · Accepted Answer

Eductional Objective: Horner syndrome results from the disruption of the cervical parasympathetic ganglia. Horner syndrome's manifestations include ptosis, miosis, and anhydrosis). It could result from compression of the Pancoast tumor. Which is a non-small lung cancer arising close to the superior sulcus.

A 72-Year-Old Man Presented to the Office Complaining of Left