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.

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.

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.