Uncommon hepatic tumors: iconographic essay - Part 1.
Most malignant liver tumors are represented by hepatocellular carcinoma and cholangiocarcinoma; however a variety of other uncommon hepatic lesions might also be found. Common lesions such as hemangioma, focal nodular hyperplasia and metastases are well known and have already been extensively documented in the literature. The diagnosis of typical hepatic lesions may be done with some reliability by means of several imaging methods; on the other hand, uncommon lesions normally represent a diagnostic challenge for the radiologist. In this first part of the study, the authors will approach five uncommon liver tumors - angiosarcoma, angiomyolipoma, cystadenoma/biliary carcinoma, epithelioid hemangioendothelioma, and fibrolamellar hepatocellular carcinoma -, describing their main characteristics and image findings with focus on computed tomography and magnetic resonance imaging.
MDs, Radiologists, Trainees at the Unit of Abdomen, Department of Imaging Diagnosis - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil.
Bruno Cheregati
BC
Pedrassa
MDs, Radiologists, Trainees at the Unit of Abdomen, Department of Imaging Diagnosis - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil.
Eduardo Lima
EL
da Rocha
MDs, Radiologists, Trainees at the Unit of Abdomen, Department of Imaging Diagnosis - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil.
Marcelo Longo
ML
Kierszenbaum
MDs, Radiologists, Trainees at the Unit of Abdomen, Department of Imaging Diagnosis - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil.
Renata Lilian
RL
Bormann
Master, Fellow PhD degree, Department of Imaging Diagnosis - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), MD, Radiologist, Hospital São Luiz, São Paulo, SP, Brazil.
Lucas Rios
LR
Torres
Private Docent, Professor, Department of Imaging Diagnosis - Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil.
Giuseppe
G
D'Ippolito
Atypical; Computed tomography; Liver; Magnetic resonance imaging; Neoplasms