Flashcards in Imaging the Adrenals Deck (12)
3 arteries that supply the adrenal glands
Superior, middle and inferior suprarenal arteries
3 zones of the adrenal cortex and what they make
Zona glomerulosa (aldosterone)
Zona fasiculata (cortisol)
Zona reticularis (androgens)
What does the adrenal medulla make?
Epinephrine and NOR
2 modalities mainly used for structural imaging of the adrenal glands?
CT and MRI (occasionally US)
Is radiography useful in adrenal imaging?
Not visible unless they are very large, calcified or contain a large amount of fat
What is the workhorse for adrenal imaging?
Imaging the NOR reuptake mechanism
Label with I-123 (imaging) or I-131 (therapy)
Imaging SS receptors
Positive in a wide variety of tumors (including pheochromocytomas)
F-18 FDG PET Imaging
FDG is a glucose analog
Actively transported into cells by glucose transport proteins
Effectively a marker or glucose metabolism
DDx for Adrenal incidentaloma
Cortex: adenoma, nodular hyperplasia, carcinoma
Other: myelolipoma, cyst, hemorrhage
Most common benign tumor of the adrenal gland
Often contains increased intracellular lipid
Increased washout of contrast compared to malignant nodes