A ring-enhancing lesion with a low-density centre on CT scans could also be suggestive of pituitary apoplexy due to infarction of an adenoma [ 10, 13]. The ischaemic apoplexy of a non secreting adenoma could therefore resemble our case. However, the tumoral syndrome in case of an adenoma responsible of hypopituitarism is usually more prominent and indirect signs may be present (such as lateral deviation of pituitary stalk, enlargement of sella turcica or erosion of the sella floor). In addition, one may expect on MRI a discrete area with different enhancement suggestive of pituitary tissue separated from the adenoma