Willem J. R. van Ouwerkerk

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An historical cohort study was conducted to investigate the rate and extent of neurological recovery in obstetric brachial plexus injury (OBPI) and to identify possible prognostic factors in a cohort of children with OBPI from birth to 7 years. All children (n=56; 31 females, 25 males) with OBPI were evaluated at fixed time intervals by one examiner. They(More)
The purpose of this study was to review the epidemiology and the clinical, radiological, pathological, and follow-up data of all surgically treated pediatric meningiomas during the last 35 years in The Netherlands. Patients were identified in the Pathological and Anatomical Nationwide Computerized Archive database, the nationwide network and registry of(More)
The primary aim of this study is to perform an internal quality control of pediatric brain tumor surgery in the neurosurgical department of the VU University Medical Center Amsterdam (The Netherlands). Secondly, this study aims to contribute to the accumulating data concerning outcome in pediatric neurosurgery, in order to establish institutional practice(More)
To identify MRI characteristics that may predict the functional effect of selective dorsal rhizotomy (SDR) in children with bilateral spastic paresis. We performed SDR in a group of 36 patients. The gross motor functioning measure-66 (GMFM-66) was applied before and after SDR. Available cerebral MRIs were retrospectively classified into three diagnostic(More)
Three previously healthy children, two girls aged 2 and almost 5 years and a boy aged 20 months, developed a progressively stumbling gait within days. In two this occurred after a period of weeks during which they complained of, or seemed to have back pain. In all three cases acute spinal cord compression by a malignant tumour was diagnosed. Histological(More)
A 7.5-month-old girl was admitted with the clinical signs and symptoms of raised intracranial pressure. This was caused by an obstructive hydrocephalus, due to cerebellar abscesses induced by an infected contiguous complete occipital dermal sinus. Staphylococcus aureus was cultured. The patient was treated by radical excision of the dermal sinus and the(More)
In this prospective study of 19 consecutive children, the operative treatment of internal rotation contracture of the shoulder in obstetric brachial plexus lesions by subscapular tendon lengthening and open reduction of the humeral head is evaluated. The average age of the children was 3.7 years and average follow-up was 20 months. Active shoulder function,(More)
OBJECT The authors performed a prospective study in which magnetic resonance (MR) imaging was conducted in 26 consecutive infants (mean age 5.6 months, range 2.7-14.5 months) in whom recovery from an obstetric lesion of the brachial plexus had been inadequate in the first 3 months of life. The purpose was to identify early secondary deformations of the(More)
OBJECTIVE Preoperative, reliable detection by ancillary investigations of spinal nerve root avulsions in infants with severe obstetric brachial plexus lesions to avoid ineffective operative repair from deceivingly intact but actually avulsed nerve roots. METHODS Ten infants were selected with an infrequent, severe dominant C7 lesion, primarily because of(More)
We undertook a prospective MRI study to measure the retroversion of the humeral head in 33 consecutive infants with a mean age of 1 year 10 months (3 months to 7 years 4 months) who had an obstetric brachial plexus lesion (OBPL). According to a standardised MRI protocol both shoulders and humeral condyles were examined and the shape of the glenoid and(More)