Term
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Definition
Nodes are not seen unless enlarged
Usually appears as a rounded, echo-poor mass 1-3 cm in size. If larger may displace surrounding structures.
“mantle” sign—group of nodes surrounding the aorta
“sandwich” sign– group of nodes surrounding the mesenteric vessels
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Term
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Definition
Usually an incidental finding
Usually unilateral
May be uni or multi-locular
Cysts may become calcified
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Term
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Definition
Addison’s syndrome
Adrenogenital syndrome
Conn’s syndrome
Cushing’s syndrome
Waterhouse-Friderichsen syndrome
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Term
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Definition
| adrenal hypofunction that may be of adrenal or pituitary origin. May be due to an adrenal tumor or mets. |
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Term
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Definition
| adrenal excretes excess androgens producing abberant sex traits |
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Term
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Definition
| excessive excretion of aldosterone |
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Term
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Definition
| excessive excretion of glucocorticoids—patient develops “fat pads” especially in the upper torso |
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Term
| Waterhouse-Friderichsen syndrome |
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Definition
| hemorrhage into adrenals that causes insufficiency—usually caused by meningococcal infection |
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Term
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Definition
Pheochromocytoma
Secretes epinephrine and norepinephrine in excessive quantities
Patient presents with intermittent hypertension
US findings of a variable appearing mass
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Term
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Definition
Adrenal neuroblastoma
Most common malignancy of the adrenals in childhood
Arises in the medulla
US findings of an echogenic mass
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Term
| Primary Retroperitoneal Tumors |
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Definition
Tumor that original independently in the retroperitoneum
Leiomyosarcoma
Liposarcomas
Fibrosarcomas and rhabdomyosarcomas
Teratomas
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Term
| Retroperitoneal Fluid Collections |
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Definition
Urinoma—walled-off collection of extravasated urine
US findings of a sonolucent mass
Hemorrhage
US findings vary according to age of blood
Abscess-may be due to surgery, trauma, or GI perforation
US findings of a complex mass
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Term
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Definition
Thick sheets of fibrous tissue develops in the retroperitoneum
May occur with abdominal aortic aneurysms
US findings of a discrete mass anterior and lateral to the great vessels
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Term
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Definition
| walled off collection of urine; occurs secondary to trauma, surgery or urinary obstruction |
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Term
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Definition
due to trauma, vasculitis, leaking aortic aneurysm, or bleed neoplasm
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Term
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Definition
May compress the IVC, AO, or ureters
Associated with taking methysergide for migraines and other drugs
Also known as Ormond’s disease
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Term
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Definition
| solid with possible necrosis |
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Term
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Definition
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Term
Fibrosarcomas and rhabdomyosarcomas |
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Definition
| highly reflective with invasion into surrounding tissues |
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Term
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Definition
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