Spectrum of Sellar Lesions

      The sella is a seat for many a lesion. In this short summary, we would like to highlight the lesions in the sella and suprasellar region that we have encountered in the past few months.

      The most common lesion is an adenoma. Depending on the size, a lesion more than 10mm in diameter is a macroadenoma, and one smaller than that is a microadenoma. The most common microadenoma is a prolactinoma. 75% of all adenomas are hormonally active and 50% of all microadenomas are prolactinomas causing symptoms of amenorrhoea, galactorrhoea, and infertility.

Hypointense nodule, left side of gland, not enhancing with the rest of the gland - microadenoma

Large lesion with cystic areas, expanding sella and enhancing uniformly - macroadenoma

      The epidermoid of the pituitary is a rare lesion. It is usually hypointense on T1W and hyperintense on T2W sequences. However as shown here it can have a hyperintense signal on T1W.