Decreased aortic growth and middle aortic syndrome in patients with neuroblastoma after radiation therapy.

Background: Long-term CT follow-up studies are required in pediatric patients who have received intraoperative radiation therapy (IORT) and external beam radiation therapy (EBRT) to assess vascular toxicities and to determine the exact complication rate.

Objective: To analyze with CT the effects of radiation therapy (RT) on the growth of the aorta in neuroblastoma patients.

Materials And Methods: Abdominal CT scans of 31 patients with intraabdominal neuroblastoma (stage II-IV), treated with RT (20 IORT+/-EBRT, 11 EBRT alone), were analyzed retrospectively.

Pediatric liver tumors--a pictorial review.

Hepatic masses constitute about 5-6% of all intra-abdominal masses in children. The majority of liver tumors in children are malignant; these malignant liver tumors constitute the third most common intra-abdominal malignancy in the pediatric age group after Wilms' tumor and neuroblastoma. Only about one third of the liver tumors are benign.

Congenital tracheobiliary fistula diagnosed with contrast-enhanced CT and 3-D reformation.

Congenital tracheobiliary fistula (CTBF) is a rare malformation. So far 24 cases have been reported in the English language literature. The imaging techniques used in diagnosis have been bronchography, fistulography, cholangiography, hepatobiliary nuclear imaging and MRI.

Long-term outcome and toxicities of intraoperative radiotherapy for high-risk neuroblastoma.

Purpose: To review a historical cohort of consecutively accrued patients with high-risk neuroblastoma treated with intraoperative radiotherapy (IORT) to determine the therapeutic effect and late complications of this treatment.

Methods And Materials: Between 1986 and 2002, 31 patients with newly diagnosed high-risk neuroblastoma were treated with IORT as part of multimodality therapy. Their medical records were reviewed to determine the outcome and complications.

Comparison of iron oxide labeling properties of hematopoietic progenitor cells from umbilical cord blood and from peripheral blood for subsequent in vivo tracking in a xenotransplant mouse model XXX.

Rationale And Objectives: To compare and optimize ferumoxides labeling of human hematopoietic progenitor cells from umbilical cord blood and from peripheral blood for subsequent in vivo tracking with a clinical 1.5 T MR scanner.

Materials And Methods: Human hematopoietic progenitor cells, derived from umbilical cord blood or peripheral blood, were labeled with Ferumoxides by simple incubation or lipofection.

Seeding of osteosarcoma in the biopsy tract of a patient with multifocal osteosarcoma.

We report a case of multifocal osteosarcoma in a 7-year-old boy who developed iatrogenic seeding of tumor along the biopsy tract. The results of the plain radiograph, CT, and histopathological correlation are presented.

Multiple thoracic vertebral compression fractures caused by non-accidental injury: case report with radiological-pathological correlation.

We report a 21-month-old boy with multiple contiguous thoracic vertebral compression fractures involving eight vertebral bodies, attributable to non-accidental injury. No subluxation was associated, however, there was extensive injury to the upper cervical and lower lumbar regions of the spinal cord. Anterosuperior beaking, thought to represent a previous injury, was evident in a mid-lumbar vertebra.

The "diaphanous" diaphragm: a radiographic sign seen after patch repair of congenital diaphragmatic hernia in neonates.

Objective: The purpose of this study was to describe the radiographic features and etiology of the "diaphanous" (translucent) diaphragm. This sign, which, to our knowledge, has not previously been described, is a transient phenomenon seen on chest radiographs, after surgical patch repair of congenital diaphragmatic hernia.

Conclusion: The diaphanous diaphragm is a consequence of air trapped in the porous polytetrafluoroethylene graft that creates an intragraft radiolucency apparent on postoperative chest radiographs obtained within the first 24 hr.