Endocrine Radiology

Question 1

What are symptoms of Pineal tumors?

Answer 1

compression of tectal plate

• deficiency of upward gaze
• pupils accommodate to near vision but no reaction to light

AKA Parinaud syndrome

Question 2

What is a gelastic seizure (laughing fits) pathognomonic for?

Answer 2

Hypothalamic lesions

Question 3

how does the anterior lobe differ from the posterior lobe on an MRI?

Answer 3

Anterior - intermediate signal intensity

posterior - fat content = hyperintense on T1

Question 4

Which type of imaging is best for evaluating the pituitary?

Answer 4

MRI

Question 5

What is the pituitary/sellar mass DDX? (SATCHMOE)

Answer 5

Sellar pituitary adenoma
Aneurysm
Teratoma
Craniopharygioma
Hypothalamic glioma
Metastasis, meningioma
Optic Nerve Glioma
Epidermoid / Eosinophilic Granuloma

Question 6

What is contained in Meckels cave? what affects this area?

Answer 6

Carotid, 3rd-6th CN

macroadenomas affect this area (SATCHMOE)

Question 7

how do you image a hypothalamic lesion?

Answer 7

MRI WITHOUT contrast

Question 8

How are thyroids usually imaged?

Answer 8

ultrasound

dopplar ultrasound

Question 9

When should a thyroid ultrasound be alarming?

Answer 9

Poor definition of margins
Hypervascularity
Inhomogeneity
Internal calcification
Irregular cystic change
Cystic area with internal debris or nodularity

Question 10

What radionucleotide is used to evaluate the parathyroid?

Answer 10

Tc99m Seastamibi

Question 11

What are S/Sx of Pancreatic Adenocarcinoma?

Answer 11

1. Weightloss
2. Unrelenting night pain
3. painless jaundice
4. COURVOISIER - palpable gallbladder (nontender w/ jaundice unlikely to be stone disease)
5. Trousseau sign (migratory superficial thrombophlebitis)

Question 12

What is a good first line exam to image a fatty adrenal lesion?

Answer 12

unenhanced CT