Many types of lesions present as a mass within or near the sella turcica (Table 16-1). The majority of sellar masses are pituitary adenomas, even those that are not obviously associated with clinical syndromes. The majority of these clinically nonfunctioning pituitary adenomas are gonadotroph adenomas, but some are relatively silent lactotroph, somatotroph, corticotroph, and thyrotroph adenomas. Determining whether …