“…Multiple mechanisms have been proposed for pituitary adenomas causing CH-like attacks, including tumor invasion into adjacent areas, 3, 7 –9,15–17 mass effect/tumor size, 3,7,10,11,15,16 hormonal secretion, 3,15 –17 and inflammation or irritation of pain-sensitive structures, such as the meninges. 3,16,17 In our case and one other, 12 CH-like attacks were initially associated with normal imaging that later revealed a macroadenoma. Unlike our case, the other report was of a single type of headache with typical features of CH.…”