A case series on the role of F-FDG PET/CT-guided biopsy of osseous metastases.

Purpose: This case series explores the utility of positron emission tomography (PET)/computed tomography (CT) guidance for biopsy of F-fludeoxyglucose (FDG)-avid osseous lesions that are inconspicuous on CT.

Methods: PET/CT-guided core biopsies were performed in four patients with suspected malignancies given F-FDG-avid osseous lesions that were inconspicuous on CT alone. The final diagnosis for each patient was determined by histopathological and molecular testing.

Findings from Structural MR Imaging in Military Traumatic Brain Injury.

Purpose: To describe the initial neuroradiology findings in a cohort of military service members with primarily chronic mild traumatic brain injury (TBI) from blast by using an integrated magnetic resonance (MR) imaging protocol.

Materials And Methods: This study was approved by the Walter Reed National Military Medical Center institutional review board and is compliant with HIPAA guidelines. All participants were military service members or dependents recruited between August 2009 and August 2014.

Restricted diffusion of the splenium in acute Wernicke's encephalopathy.

Acute Wernicke's encephalopathy (WE) is caused by profound vitamin B1 (thiamine) deficiency and commonly presents with the classic clinical triad of mental confusion, ataxia, and ophthalmoplegia. This characteristic presentation results from the propensity of acute thiamine deficiency to preferentially injure specific brain regions: the dorsomedial thalamus, periaqueductal gray, and mamillary bodies. In these regions, abnormal magnetic resonance signaling on conventional sequences has been well described; however, diffusion restriction has only recently been reported.