Imaging features of medulloepithelioma: report of four cases and review of the literature.

Background: Intraocular medulloepithelioma is a childhood tumor arising from the nonpigmented primitive ciliary neuroepithelium. Although rarer than retinoblastoma, it remains the second most common primary intraocular neoplasm in children. The rarity of intraocular medulloepithelioma creates the challenge in establishing a clinical diagnosis, and radiologically the tumor is often confused with other intraocular masses.

The effects of propofol on cerebral perfusion MRI in children.

Introduction: The effects of anesthesia are infrequently considered when interpreting pediatric perfusion magnetic resonance imaging (MRI). The objectives of this study were to test for measurable differences in MR measures of cerebral blood flow (CBF) and cerebral blood volume (CBV) between non-sedated and propofol-sedated children, and to identify influential factors.

Methods: Supratentorial cortical CBF and CBV measured by dynamic susceptibility contrast perfusion MRI in 37 children (1.

Unique MRI findings as an early predictor of osteonecrosis in pediatric acute lymphoblastic leukemia.

Objective: Osteonecrosis is a potential complication of glucocorticoid chemotherapy in children surviving leukemia. Early diagnosis may allow effective interventions to minimize or ameliorate joint deterioration and obviate surgical intervention. We investigated the significance of MRI signal changes that precede the currently recognized "double-line" changes, which are considered pathognomic of osteonecrosis.

Topics in perinatal genitourinary system ultrasound evaluation.

Ultrasound is a helpful imaging tool for triaging and in most instances making a definitive diagnosis of abnormalities of the fetal and neonatal genitourinary systems. Ultrasound can define an abnormality found in a fetus or neonate as definitively related to the genitourinary system, guiding further workups. Ultrasound can be used to assuage clinical concern by showing normal anatomic findings or variants that can simulate abnormality.

Outcome of fetuses with cerebral ventriculomegaly and septum pellucidum leaflet abnormalities.

Objective: The objective of this study was to assess the outcomes of the prenatal diagnosis of septal leaflet abnormalities in fetuses referred for prenatal imaging with a finding of ventriculomegaly.

Materials And Methods: This study is a retrospective review of fetuses with a diagnostic code of septal leaflet abnormalities from a larger prospective study. Four hundred twenty-five pregnant women with 433 fetuses referred for ventriculomegaly were imaged with ultrasound and MRI between July 1, 2003, and May 15, 2009.