Imaging the Adrenals Flashcards Preview

Week 27: Adrenal Dysfunction > Imaging the Adrenals > Flashcards

Flashcards in Imaging the Adrenals Deck (12)
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1

3 arteries that supply the adrenal glands

Superior, middle and inferior suprarenal arteries

2

3 zones of the adrenal cortex and what they make

Zona glomerulosa (aldosterone)
Zona fasiculata (cortisol)
Zona reticularis (androgens)

3

What does the adrenal medulla make?

Epinephrine and NOR

4

2 modalities mainly used for structural imaging of the adrenal glands?

CT and MRI (occasionally US)

5

Is radiography useful in adrenal imaging?

Nope
Not visible unless they are very large, calcified or contain a large amount of fat

6

What is the workhorse for adrenal imaging?

CT

7

MIBG

NOR analog
Imaging the NOR reuptake mechanism
Label with I-123 (imaging) or I-131 (therapy)

8

In-111 Octreotide

Somatostatin analog
Imaging SS receptors
Positive in a wide variety of tumors (including pheochromocytomas)

9

F-18 FDG PET Imaging

FDG is a glucose analog
Actively transported into cells by glucose transport proteins
Effectively a marker or glucose metabolism

10

DDx for Adrenal incidentaloma

Cortex: adenoma, nodular hyperplasia, carcinoma
Medulla: pheochromocytoma
Metastases: lung
Other: myelolipoma, cyst, hemorrhage

11

Adrenal adenomas

Most common benign tumor of the adrenal gland
Often contains increased intracellular lipid
Increased washout of contrast compared to malignant nodes

12

Adrenal metastases most often come from what 3 places

Lung
Breast
Melanoma (skin)