HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Yu, J.-S. Articles by Rofsky, N. M. Search for Related Content PubMed PubMed Citation Articles by Yu, J.-S. Articles by Rofsky, N. M. Social Bookmarking                      What's this? Hotlight (NEW!) What's Hotlight?

Hepatic Metastases: Perilesional Enhancement on Dynamic MRI

¹ Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Ave., Boston, MA 02215.
² Present address: Department of Diagnostic Radiology, Yonsei University College of Medicine, Yongdong Severance Hospital, Seoul, Republic of Korea 135-720.

View larger version (15K): [in a new window]   Fig. 1 —Diagram for calculating thickness of peritumoral and tumoral enhancement from rim enhancement of tumor on arterial phase dynamic MR images. Left drawing is schema of tumor on precontrast T1-weighted MR image and right is for rim enhancement of same lesion on arterial phase dynamic MR image. Light gray area on right image represents contour of tumor, not delineated on arterial phase images because of superimposed rim enhancement in inner and outer portion of tumor margin. Horizontal dotted line is imaginary line along longest dimension for lesion, used for reference plane to measure tumor size (a), outer (b), and inner (c) dimension of rim enhancement after synchronization of anatomic level of arterial phase images with nonenhanced images. Outer thickness of rim enhancement was estimated by subtracting a from b, and result was regarded as thickness of circumferential perilesional enhancement. Inner thickness of rim enhancement was estimated by subtracting c from a, and result used to represent tumor vascularity in periphery of each lesion.

View larger version (108K): [in a new window]   Fig. 2A —53-year-old woman with perilesional circumferential enhancement for hypovascular metastases from colon cancer. Transverse spoiled gradient-echo MR image (TR/TE, 192/5.3; flip angle, 80°) shows low-signal-intensity lesion (arrow) in liver.

View larger version (119K): [in a new window]   Fig. 2B —53-year-old woman with perilesional circumferential enhancement for hypovascular metastases from colon cancer. Transverse arterial phase dynamic 3D spoiled gradient-echo MR image (5.7/1.9; flip angle, 12°) shows circumferential perilesional enhancement (arrowheads) without considerable contrast enhancement within lesion itself.

View larger version (16K): [in a new window]   Fig. 2C —53-year-old woman with perilesional circumferential enhancement for hypovascular metastases from colon cancer. Diagram of lesional and perilesional enhancement shows most of rim enhancement for hypovascular metastases is perilesional enhancement (dark gray area) rather than peripheral enhancement of lesion itself (light gray area).

View larger version (106K): [in a new window]   Fig. 3A —65-year-old woman with perilesional circumferential enhancement for hypervascular metastasis from lung cancer. Transverse 3D spoiled gradient-echo MR image (TR/TE, 4.2/1.9; flip angle, 12°) shows low-signal-intensity lesion (arrow) in right lobe of liver adjacent to gallbladder.

View larger version (120K): [in a new window]   Fig. 3B —65-year-old woman with perilesional circumferential enhancement for hypervascular metastasis from lung cancer. Transverse arterial phase dynamic 3D spoiled gradient-echo MR image (4.2/1.9; flip angle, 12°) shows minimal perilesional enhancement with intense contrast enhancement within peripheral portion of lesion (arrowheads).

View larger version (15K): [in a new window]   Fig. 3C —65-year-old woman with perilesional circumferential enhancement for hypervascular metastasis from lung cancer. Diagram of lesional and perilesional enhancement shows most of rim enhancement for hypervascular metastases is peripheral enhancement of lesion itself (light gray area) rather than perilesional enhancement (dark gray area).

View larger version (116K): [in a new window]   Fig. 4A —Wedge-shaped perilesional enhancements around hepatic metastases in three patients. Transverse arterial phase dynamic 3D spoiled gradient-echo MR image (TR/TE, 3.6/1.9; flip angle, 12°) shows hepatic metastasis (arrow) from colon cancer accompanied by distal type wedge-shaped peritumoral enhancement (arrowheads).

View larger version (109K): [in a new window]   Fig. 4B —Wedge-shaped perilesional enhancements around hepatic metastases in three patients. Transverse arterial phase dynamic 3D spoiled gradient-echo MR image (4.0/1.6; flip angle, 12°) shows hypointense hepatic metastasis (arrow) from esophagus cancer accompanied by proximal type wedge-shaped peritumoral enhancement (arrowheads).

View larger version (116K): [in a new window]   Fig. 4C —Wedge-shaped perilesional enhancements around hepatic metastases in three patients. Transverse arterial phase dynamic 3D spoiled gradient-echo MR image (4.5/1.9; flip angle, 12°) shows hepatic metastases (arrow) from colon cancer accompanied by nonsegmental type wedge-shaped peritumoral enhancement (arrowheads) encompassing right hepatic vein. Extent and direction of wedge-shaped enhancement is not corresponded with hepatic segment with gross appearance of metastatic lesions.

CiteULike

Complore

Connotea

Del.icio.us

Digg

Reddit

Technorati