Step-by-step approach to the suprasellar region. The first step is wide opening of the sphenoid sinus with complete posterior ethmoidectomy to identify lateral optic-carotid recess (LOCR), optic canal, paraclinoidal internal carotid artery (ICA) prominence, tuberculum sella, prechiasmatic sulcus, limbus of the sphenoid, and planum sphenoidale. (Image courtesy of JC Fernandez-Miranda)