We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Hepatic sarcomatoid carcinoma: magnetic resonance imaging evaluation by using the liver imaging reporting and data system.
- Authors
Seo, Nieun; Kim, Myeong-Jin; Rhee, Hyungjin
- Abstract
<bold>Objectives: </bold>To evaluate how sarcomatoid carcinomas (SCs) would be classified on magnetic resonance imaging (MRI) by using the Liver Imaging Reporting and Data System (LI-RADS) and to assess imaging features of SC compared with other hepatic malignancies.<bold>Methods: </bold>We retrieved 184 patients with pathologically confirmed SC (n = 46), hepatocellular carcinoma (HCC, n = 92), and intrahepatic cholangiocarcinoma (iCCA, n = 46) diagnosed between January 2006 and December 2017. Two readers independently reviewed MRI according to LI-RADS v2017. Classification rate of SC, as probably or definitely malignant but not specific for HCC (LR-M), was calculated. LR-TIV (tumor in vein) was subclassified as either 5V or MV. MRI features were compared between SC, HCC, and iCCA and between SC of LR-M and non-LR-M categories.<bold>Results: </bold>Chronic liver disease was present in 71.7% (33/46) of patients with SC, and LI-RADS was applied for these patients. SC was classified as LR-M in 24 (72.7%) of 33 patients at risk. SCs that had been classified as LR-4/5/5V were significantly smaller (median, 1.9 cm; range, 1.0-4.2 cm) than SCs classified as LR-M/MV (median, 4.3 cm; range, 1.3-20.6 cm) on independent t test (p = 0.012). SCs commonly showed MRI features similar to iCCAs than to HCCs. Targetoid appearance and capsular retraction were more frequent in iCCA than in SC (p ≤ 0.009) on Pearson's chi-squared test or Fisher's exact test.<bold>Conclusion: </bold>Most SCs can be classified as LR-M on MRI, but small lesions may be indistinguishable from HCCs.<bold>Key Points: </bold>• Most sarcomatoid carcinomas (SCs) are classified as LR-M on MRI by using LI-RADS v2017. • SC showed various LR-M features similar to those of intrahepatic cholangiocarcinoma. • Size of LR-4/5/5V SC was significantly smaller than that of LR-M/MV SC.
- Subjects
MAGNETIC resonance imaging; FISHER exact test; CARCINOMA; CHI-squared test; HEPATOCELLULAR carcinoma
- Publication
European Radiology, 2019, Vol 29, Issue 7, p3761
- ISSN
0938-7994
- Publication type
journal article
- DOI
10.1007/s00330-019-06052-8