No signal drop-off on CSI Haemorrhage Variable - PET-negative depends on age of haematoma Acute-[up arrow]-T1 Subacute - haemosiderin
rim Chronic-T1 [down arrow] T2 [up arrow] GRE-'blooming' Adrenal cyst [up arrow]T2 PET-positive [down arrow]-T1 Infection Intermediate signal Variable; active intensity infection can be PET positive Adrenal lesion Comment Adrenocortical 30% of adenomas are lipid adenoma poor Metastases Non-FDG avid primary tumours have PET-negative metastases Fatty metastases: <10 HU Adrenocortical Evaluate tumour extension carcinoma into IVC, renal veins.
At the same time, retention in ferritin falls, so releasing more iron into the circulation, with reduced storage of redundant amounts both in this protein and as haemosiderin
Iron from haemoglobin is deposited as haemosiderin
and causes a brown staining in the leg.
An electron microscopical study on the genesis of lipofuscin, melanin and haemosiderin
in the haemopoitic tissues of fish.
Successful reduction of hepatocellular haemosiderin
content in toco toucans (Ramphastos toco) with haemochromatosis by dietary modification.
Iron is stored as ferritin or haemosiderin
, with the principal sites of storage being the liver, bone marrow and spleen.
This finding may be due to the deposition of haemosiderin
laden macrophages in relation to small vessels and bronchioles (15).