- a superior sulcus tumor is a lung cancer occurring in the lung apex - a **Pancoast tumour** is a type of superior sulcus tumor with involvement of the *sympathetic ganglia* causing a [[pupil exam#Horner Syndrome|Horner syndrome]] with ipsilateral ptosis, miosis, and anhidrosis - can also cause [[Pemberton's sign|SVC obstruction]] ![[Pasted image 20241102173514.png]]