Pituitary hyposignal characteristic of hemochromatosis on MRI.

Pituitary haemochromatosis is an endocrine disorder caused by the accumulation of iron due to a lack of absorption during haemochromatosis. The characteristic appearance on MRI is a T2 and T2* hyposignal of the anterior pituitary gland without enhancement, respecting the pituitary stalk and the posterior pituitary gland.

Retroperitoneal paraganglioma.

Paragangliomas are rare tumors of the neuroendocrine system that form near certain blood vessels (paraaortic and carotid) and nerves, often presenting heterogeneous parenchyma and displaying strong contrast enhancement on computed tomography. Underdiagnosis and misdiagnosis of this tumor are suspected as they can be silent, of small size, or confused with other structures.