Imaging of trauma: Part 1, Pseudotrauma of the spine--osseous variants that may simulate injury.

Objective: Anatomic variants and incomplete ossification and fusion of the developing spine may result in an erroneous diagnosis of injury or disease. This article reviews some of the more common imaging findings that may present as pseudotrauma. Normal development of the spine is reviewed, including synchondroses and ossification centers.

Childhood subdural hemorrhage, macrocephaly, and coagulopathy associated with Prader-Willi syndrome: case report and review of the literature.

A 16-month-old girl with a history of Prader-Willi syndrome and progressive macrocephaly manifested large, bilateral, subdural hemorrhages of differing ages on magnetic resonance imaging. Subsequent evaluation revealed a deficiency of von Willebrand factor, but after repeated evaluations, no conclusive evidence of nonaccidental trauma became apparent. Subdural hemorrhages of varying ages are frequently associated with nonaccidental trauma during early childhood.

Comparison of 3 Tesla proton MR spectroscopy, MR perfusion and MR diffusion for distinguishing glioma recurrence from posttreatment effects.

Purpose: To compare 3 Tesla (3T) multi-voxel and single-voxel proton MR spectroscopy (MRS), dynamic susceptibility contrast perfusion MRI (DSC), and diffusion-weighted MRI (DWI) for distinguishing recurrent glioma from postradiation injury.

Materials And Methods: We reviewed all 3T MRS, DSC and DWI studies performed for suspicion of malignant glioma recurrence between October 2006 and December 2008. Maximum Cho/NAA and Cho/Cr peak-area and peak-height ratios were recorded for both multi-voxel and single-voxel MRS.

Verification bias an underrecognized source of error in assessing the efficacy of medical imaging.

Rationale And Objectives: Diagnostic tests are validated by comparison against a "gold standard" reference test. When the reference test is invasive or expensive, it may not be applied to all patients. This can result in biased estimates of the sensitivity and specificity of the diagnostic test.

Extrapleural hematomas: imaging appearance, classification, and clinical significance.

Purpose: We sought to identify radiologic and clinical findings associated with extrapleural hematomas (EPHs), to formulate an imaging-based classification system for EPHs, and to identify any radiologic or clinical factors associated with surgical intervention.

Materials And Methods: Thirteen cases of EPH were gathered during the clinical review. An EPH was diagnosed on computed tomography (CT) if there was inward displacement of extrapleural fat by an intrathoracic peripheral fluid collection.