Utility of INR For Prediction of Delayed Intracranial Hemorrhage Among Warfarin Users with Head Injury.

Background: Incidence of delayed intracranial hemorrhage (DICH) in patients on warfarin has been controversial. No previous literature has reported the utility of international normalized ratio (INR) in predicting traumatic DICH.

Objectives: Utilizing INR to risk stratify head trauma patients who may be managed without repeat imaging.

Spinal and paraspinal fungal infections associated with contaminated methylprednisolone injections.

Background: A nationwide outbreak of fungal infections was traced to injection of Exserohilum-contaminated methylprednisolone. We describe our experience with patients who developed spinal or paraspinal infection after injection of contaminated methylprednisolone.

Methods: Data were assembled from the Michigan Department of Community Health, electronic medical records, and magnetic resonance imaging (MRI) reports.

Injuries of the head from backface deformation of ballistic protective helmets under ballistic impact.

Modern ballistic helmets defeat penetrating bullets by energy transfer from the projectile to the helmet, producing helmet deformation. This deformation may cause severe injuries without completely perforating the helmet, termed "behind armor blunt trauma" (BABT). As helmets become lighter, the likelihood of larger helmet backface deformation under ballistic impact increases.

Magnetic resonance imaging screening to identify spinal and paraspinal infections associated with injections of contaminated methylprednisolone acetate.

Importance: Injection of contaminated methylprednisolone has resulted in an unprecedented nationwide outbreak of Exserohilum rostratum fungal infections, manifested initially as meningitis and/or basilar stroke. Insidious onset of spinal or paraspinal infection at the injection site has been increasingly reported and is occurring months after receipt of injection with the contaminated drug. The clinical findings are often subtle and similar to those that led the patient to undergo the methylprednisolone injection.

DWI findings of optic nerve ischemia in the setting of central retinal artery occlusion.

A 67-year-old African-American male with untreated hypertension, hyperlipidemia, and diabetes mellitus presented with sudden, staggering, progressive loss of vision in his left eye over the course of 8 days. Ophthalmologic and fluorescein angiography exams confirmed central retinal artery conclusion, but revealed no embolus. Magnetic resonance imaging of the brain serendipitously revealed restricted diffusion within the distal left optic nerve, illustrating a more proximal occlusion, which matched the fluorescein angiographic findings.

Positron emission tomography/computed tomography potential pitfalls and artifacts.

With the recent use of 18-fluoro-2-deoxyglucose (FDG) positron emission tomography (PET) for tumor staging and treatment response, it is important to recognize many pitfalls, artifacts, and benign uptakes that are commonly encountered. Normal physiology can explain many regions of increased FDG activity, as well as incidental benign tumors and benign metabolic conditions. Recognition of characterization of benign causes and physiologic variants for FDG uptake are discussed to avoid improper characterization as a malignancy.