Suspicion of Recurrent Osteosarcoma in a Patient with Pseudotumour Adjacent To the Endoprosthesis.

Purpose: Pseudotumor is a rare complication after arthroplasty, most often of the hip joint, in response to metal particles present in the implant. There are merely sporadic reports of pseudotumor in patients with bone sarcoma after sparing surgery with endoprosthesis implant. The aim of this study is to present the characteristic imaging features of pseudotumor.

Arterial spin labeling in neonatal magnetic resonance imaging - first experience and new observations.

Purpose: Arterial spin labeling (ASL) is a noninvasive non-contrast technique of perfusion imaging that uses endogenous water from the blood as the perfusion tracer, with very scant data on its use in neonates. The authors present the added value of ASL in the examined babies in their own material and discuss it in the light of the existing literature.

Material And Methods: During the first 10 months after the purchase of a new magnetic resonance imaging (MRI) scanner, 123 neonates were examined using it in an MR-compatible incubator, 117 of them had brain MRI, and in 104 ASL was incorporated in the routine protocol, which resulted in prolongation of the study time by approximately 4 minutes.

Neonatal brain and body imaging in the MR-compatible incubator.

Background: The use of a specialized MR-compatible incubator (INC) is very poorly described in the literature and only with regard to brain imaging.

Objectives: To present our own experience with brain and body magnetic resonance imaging (MRI) in the INC in a large cohort of neonates.

Material And Methods: A total of 555 examinations were performed in 530 newborns with the use of a 1.

Seventeen years of prenatal magnetic resonance imaging at the Institute of Mother and Child in Warsaw.

Purpose: The purpose of this paper is to summarise and to present the experience of the main Polish centre for prenatal magnetic resonance imaging (MRI) and to discuss the place and role of MRI in antenatal diagnosis, management, and counselling.

Material And Methods: Retrospective analysis of the examinations performed in the years 2001-2017.

Results: In total, 1221 medical records and/or image files were collected.

Neuroimaging results, short-term assessment of psychomotor development and the risk of autism spectrum disorder in extremely premature infants (≤28 GA) - a prospective cohort study (preliminary report).

Objective: Infants ≤28 GA are at particular risk of psychomotor and neurological developmental disorder. They also remain at a higher risk of developing autism spectrum disorder (ASD), characterized by persistent deficits in communication/social interactions and restricted, repetitive behaviors, activities and interests. Monitoring their development by a team of specialists (a neurologist, psychologist, psychiatrist) allows us to make an early diagnosis and to implement appropriate therapy.

Imaging of Complications After Limb Prostheses Implantation in Children with Bone Tumors.

Background: Tumors of the developmental age are an important problem in clinical practice. Primary bone tumors constitute 1-1.5% of all tumors, and 7% of all tumors diagnosed in the developmental age.

CNS Metastases from Bone and Soft Tissue Sarcomas in Children, Adolescents, and Young Adults: Are They Really So Rare?

. To check whether primary involvement of brain/spinal cord by bone/soft tissue sarcomas' metastases in children is as rare as described and to present various morphological forms of bone/soft tissue sarcomas' CNS metastases. .

Diffusion restriction in the corticospinal tracts and the corpus callosum in neonates after cerebral insult.

Background: In neonatal brains diffusion restriction, which is not limited to the region of insult, but is also found in distant locations from it seems to be a frequent finding, called pre-Wallerian degeneration.

Objectives: The purpose of this study was to describe these findings and to estimate the frequency of their occurrence with an attempt to determine their clinical significance.

Methods: 125 brain MRI examinations of neonates with confirmed brain damage performed or consulted in our Institute were retrospectively reviewed, focusing on the presence of restricted diffusion in corticospinal tracts (CST) and corpus callosum (CC).

Fetal MRI versus postnatal imaging in the MR-compatible incubator.

Introduction: One of the aims of fetal magnetic resonance imaging (MRI) is to avoid postnatal scanning. However, clinicians sometimes wish to have postnatal confirmation of prenatal findings. This study's purpose was to check whether there was indeed the added value of neonatal MRI performed in the MR-compatible incubator (INC) after fetal examination.

Circle of Willis abnormalities in children with neurofibromatosis type 1.

Background And Purpose: The aim of the study was to assess anatomical variants and abnormalities in cerebral arteries on magnetic resonance angiography in 67 children with neurofibromatosis type 1 (NF1).

Materials And Methods: The study included 67 children aged 9 months to 18 years (mean 6.6 years).

Rhombencephalosynapsis - isolated anomaly or complex malformation?

Background: Rhombencephalosynapsis (RES) is a rare malformation of the posterior cranial fossa, characterized by fusion of the cerebellar hemispheres, medial cerebellar peduncles and dentate nuclei. Over the period of 7 years 8 cases of this anomaly have been diagnosed in two pediatric centers in Warsaw including one on the prenatal magnetic resonance imaging (MRI).

Material/methods: Material consists of involves one fetus examined at the gestational age of 27 and 33 weeks and 7 children (5 girls and 2 boys) aged 8 months - 16 years.

MR images of bone lesions in children treated due to leukemia.

Leukemia is the most frequent malignancy in children (30-40%); acute lymphoblastic leukemia (ALL) accounts for 85% of cases of this leukemia. Apart from bone marrow infiltration, MR imaging reveals other lesions in the bones of these children, that may be a complication of the disease or of its therapy and do not require referral to the oncologist unless they are misinterpreted. These lesions include osteonecrosis, stress fractures due to osteopenia, osteomyelitis - often resulting from administration of corticosteroids.

[Sonography of small bowel, colon and appendix in children with cystic fibrosis].

Aim: To assess the utility of sonographic examination in estimation of the incidence and character of pathological changes in different parts of the intestine and other abdominal organs in children with cystic fibrosis (CF).

Material And Method: The study group consisted of 182 children (94 girls, 88 boys), aged from 2 months up to 22 yrs, with diagnosed cystic fibrosis or its suspicion, confirmed later. The control group consisted of 20 children with mean age 8 yrs.

Brain development of the human fetus in magnetic resonance imaging.

Introduction: Ultrasonography is the first step in the in vivo evaluation of fetal central nervous system. However, it is not always easy--or even possible--to carry out this examination because of maternal obesity, oligo- or ahydramnios or fetal position. Magnetic resonance imaging becomes then the only method of assessment.

Postradiotherapeutic changes and their evolution in MRI in children with aggressive soft tissue tumors.

Background: Magnetic resonance imaging is a commonly used method of monitoring of soft tissue tumours. The aim of the work was to describe precisely the typical changes within soft tissues and bones occurring after radiotherapy in children treated for sarcomas and other soft tissue tumours. With time, the changes undergo evolution and their characteristics and comparison with previous examinations help in a difficult differentiation between tumour lesions and posttherapeutic changes.