(n¼2) had a median OS of 20m vs 4.8 in patients who did not

receive adrenal RFA (p¼0. 65). Extra-hepatic mets were present

before 1st DEB TACE in 81% of pts vs after 1st DEB TACE in

19%; median OS-Emb 6.7 vs 7.7 m (p¼0.9). Child-Pugh Class A,

B and C stage were present in 62.3%, 29% and 8.7% of the pts

with corresponding median OS-Emb were 10.5m, 5.2m and 1.6m

respectively (po0.001). Okuda stage I, II and III were present in

31.9%, 58% and 10.1% of the pts with corresponding median OS-

Emb were 10.6m, 7.4m and 1.6m respectively (po0.001). 50.7%

of pts had portal vein thrombosis (PVT) with median OS-Emb

was 4.9m vs 12.1m who did not have PVT (p¼0.1). 44.9% of pts

received sorafenib systemic chemotherapy with median OS-Emb

was 10.5 m vs 5.5 m who did not receive the sorafenib (p¼0.1).

The following variables were significant prognostic indicators of

survival on multivariate analysis; site of mets, Child-Pugh class

and Okuda stage.

Conclusion: mHCC patients in Child-Pugh A, isolated mets to

adrenal or lung or portahepatic node and Okuda stage I benefited

most from DEB TACE therapy.

Survivals and Predictive Factors of Metastatic Hepato-cellular Carcinoma (MhCC) Treated with DoxorubicinDrug-Eluting Beads Transcatheter Chemoembolization(DEB TACE)

Survival Analysis

Location of mets Adrenal glandonly

Isolated portalhepatic lympha-denopathy (LN)

% (Number) 8.7 % (6) 20.3% (14)Median OS fromDEB TACE (m)

20 20.3

P value 0.002

Survivals and Predictive Factors of Metastatic Hepato-cellular Carcinoma (MhCC) Treated with DoxorubicinDrug-Eluting Beads Transcatheter Chemoembolization(DEB TACE), continued

Cardio-phrenicor retroperi-toneal orothergroup LN

Lungsonly

Bonesonly

Othersormultiplelocations

27.5% (19) 11.6% (8) 2.9% (2) 29% (20)5.2 30.8 10.5 4.4

Abstract No. 403

Withdrawn

Educational Exhibit Abstract No. 404

Parathyroid venous sampling: a pictorial review ofnormal and variant applied venous anatomyG.N. Babu, J.W. Pinchot, J. Fallucca, P. Dalvie,J.C. McDermott, O. Ozkan; Radiology, University ofWisconsin - Madison, Madison, WI

Learning Objectives: To facilitate widespread utilization of the

parathyroid venous sampling, this pictorial assay reviews normal

anatomy and its variants of considerable clinical importance. We

will also present the problems and challenges they pose for the

interventional radiologist.

Background: Parathyroid venous sampling for para-thyroid

hormone (PTH) is a highly promising method for localization

and diagnosis of parathyroid tumors. Sampling of small veins is

the goal. The reported sensitivity of parathyroid venous sampling

is 70-80%. However, patients with congenital variation in

anatomy and also those with distorted anatomy due to previous

surgery can sometime present significant challenge to successful

completion of bilateral parathyroid venous sampling resulting in

false negative test.

Clinical Findings/Procedure Details: Technical Details: This

pictoral review presents parathyroid venous anatomy along with

the details of catheterization and retrograde venography of the

parathyroid venous bed wherever necessary. In the entire series of

no significant complication has occurred. Normal Anatomy and

Variants: The thyroid venous bed is composed of:

(a) a diffusely anastomosing, valveless plexus of veins arising

from and investing the thyroid gland; and

(b) paired, draining superior, middle and inferior thyroid veins.

- Superior thyroid veins

- Middle thyroid veins

- Inferior thyroid veins

- most common patterns

- Thymic mediastinal veins

- Azygos vein and left superior intercostal veins

- Few confusing veins such as anterior jugular and the vertebral

veins as well as mediastinal veins.

- Interesting cases

Conclusion and/or Teaching Points: The roentgenographic

anatomy of parathyroid veins is presented. As usual with venous

anatomy, variations from the preceding standard description are

common. Parathyroid drainage occurs predominantly via the

inferior thyroid vein. Although inferior thyroid drainage is

variable, bilateral samples could be obtained in a high percentage

of cases. Probably least important for parathyroid drainage, the

superior thyroid was the most constant and predictable of the

thyroid veins.

Abstract No. 405

Level of occlusion of a resorbable hydrogel andmicrosphere in a rabbit renal modelL. Weng1, P. Rostamzadeh1, N. Rostambeigi1, M. Bravo2,J. Carey2, J. Golzarian1; 1Radiology, University ofMinnesota, Minneapolis, MN; 2North American ScienceAssociates, Brooklyn Park, MN

Purpose: To compare the level of occlusion for a bioresorbable

hydrogel and microspheres in a renal embolization model.

Materials and Methods: Four adult rabbits (New Zealand, 2.9-

3.3 kg) were used. Bioresorbable hydrogel microspheres (100-300

mm), prepared from carboxymethyl chitosan (CCN) and oxidized

carboxymethyl cellulose (OCMC, 25% theoretical oxidation degree),

JVIR ’ Posters and Exhibits S171

Posters

andExhibits