High-Resolution Diffusion-Weighted Imaging for Evaluation of Extramural Tumor Invasion in Primary Rectal Cancer.

Objective: The aim of this study was to determine the added value of high-resolution diffusion-weighted imaging (DWI) to T2-weighted imaging (T2WI) for evaluation of extramural tumor invasion (EMTI) in patients with primary rectal cancer.

Methods: Seventy-eight patients who had undergone 3.0-T magnetic resonance imaging including DWI (b = 0, 1000 s/mm2, 2 mm iso-voxel) and subsequent surgery were included.

Association between Texture Analysis Parameters and Molecular Biologic KRAS Mutation in Non-Mucinous Rectal Cancer.

Purpose: To evaluate the association between magnetic resonance imaging (MRI)-based texture parameters and Kirsten rat sarcoma viral oncogene homolog (KRAS) mutation in patients with non-mucinous rectal cancer.

Materials And Methods: Seventy-nine patients who had pathologically confirmed rectal non-mucinous adenocarcinoma with or without KRAS-mutation and had undergone rectal MRI were divided into a training ( = 46) and validation dataset ( = 33). A texture analysis was performed on the axial T2-weighted images.

Recurrent Primary Pleomorphic Liposarcoma of the Breast: A Case Report with Imaging Findings.

Primary pleomorphic liposarcoma of the breast is rare, and only a few cases in the literature have reported imaging findings. Herein, we report a rare case of primary pleomorphic liposarcoma of the breast in a 38-year-old woman and describe the imaging findings including mammography, ultrasonography, computed tomography, magnetic resonance imaging, and F-Fluorodeoxyglucose-positron emission tomography. Although most fat-containing breast masses are benign, malignancy can occur.

Association between oncogenic RAS mutation and radiologic-pathologic findings in patients with primary rectal cancer.

Background: To evaluate the association between various radiologic-pathologic findings and oncogenic Kirsten-ras (KRAS) mutation in patients with primary rectal cancer.

Methods: Seventy-five patients with primary rectal cancer who had undergone rectal magnetic resonance imaging (MRI) were included. The rectal MRI consisted of T2-weighted images in three planes, pre- and post-contrast-enhanced T1-weighted images, and axial diffusion-weighted images (b factors, 0, 1,000 s/mm).

Added value of diffusion-weighted imaging for evaluation of extramural venous invasion in patients with primary rectal cancer.

Objective:: To evaluate the added value of diffusion-weighted imaging (DWI) to T weighted imaging (T WI) for detection of extramural venous invasion (EMVI) in patients with primary rectal cancer.

Methods:: 79 patients (50 men, 29 females, mean age 67.4 years, range 37-87 years) who had undergone rectal MRI and subsequently received surgical resection were included.