Liver metastases from unknown primary site: demonstration on MR images.

To demonstrate the MR imaging features of liver metastases in patients with the clinical and histologic diagnosis of tumors of unknown primary tumors, a retrospective 7-year study was performed that included a total of 14 consecutive patients (7 men and 7 women; age range, 39-82 years; mean age, 60.6 years) with liver metastases from unknown primary site who had undergone MR imaging. The following lesion features were evaluated: a) number, b) diameter, c) signal intensity on T1 and T(2)-weighted images, and d) pattern of enhancement on immediate, 45 s and 90 s post gadolinium images.

Spectrum of MRI appearances of untreated metastases of the liver.

Objective: The purpose of our study was to identify the spectrum of MRI appearances of untreated liver metastases from different primary origins.

Materials And Methods: Over a period of 52 months, we used our clinical information system to retrospectively identify the first MRIs obtained in 165 consecutive patients who had untreated liver metastases. All patients had histologic confirmation of the primary tumor.

Liver metastases from pancreatic adenocarcinoma: MR imaging characteristics.

Purpose: To describe the magnetic resonance imaging spectrum of appearances of liver metastases from pancreatic ductal adenocarcinoma.

Materials And Methods: We retrospectively evaluated the MRI exams performed between July 1996 and August 2001 in all patients who had liver metastases from pancreatic adenocarcinoma and histopathologic diagnosis from either the primary pancreatic tumor, liver metastases, or both. Sixteen patients were included in the study.

Giant hemangioma of the liver: MR imaging characteristics in 24 patients.

We retrospectively reviewed the magnetic resonance imaging (MRI) of giant hemangiomas in 24 patients. MRI studies comprised T1-weighted, T2-weighted and serial gadolinium-enhanced spoiled gradient echo (SGE) images. Morphologic features, signal characteristics and enhancement patterns were assessed.

MR imaging of diffuse liver disease.

MR imaging is able to demonstrate and distinguish the full variety of benign and malignant diffuse liver diseases.