“…6,7) Intrasellar arachnoid cyst is rare, [2][3][4][5][6]8,10,11,13,17,19,20) and it is important, although difficult, to differentiate this type of cyst from other cystic lesions such as Rathke's cleft cyst, pituitary cyst (parenchymal or adenomatous), craniopharyngioma, pars intermedia cyst, and other miscellaneous cysts (epidermoid cyst, cysticercosis cyst) when considering the prognosis. 9,14) Hypothalamic dysfunction due to an intrasellar arachnoid cyst is extremely rare.…”