Cranio-orbital correction for massive enlargement of the cranial vault

Case Report: Cranial Vault Reduction Cranioplasty for Severe Hydrocephalus

Extreme hydrocephalic macrocephaly is still encountered in developing countries due to delayed treatment, rapidly progressing hydrocephalus and family socioeconomic problems. Reduction cranioplasty was used with several techniques to address the issue. The study aimed to determine the safety and feasibility of barrel-stave technique for reducing the size of extreme hydrocephalic macrocephaly. Three post-diversion patients underwent surgical reconstruction. Children with head circumference more or equal to two standard deviation above mean on given age, no active wound at the area of surgery, presentation of sufficient “potential removable fluid” that allows dura reduction and no active shunt infection were eligible. The surgical procedure includes modified pi, barrel-stave technique, and diversion of the cerebrospinal fluid and subdural collection. Clinical data were recorded. Three patients with age range of 2 month to 2 years old underwent the surgery. Two patients had shunt implanted at least 1 month before the surgery and 1 patient had an ETV procedure 3 months before the reduction. The frontal-occipital circumference before surgery ranged from 50 to 63 cm. The maximum reduction that could be achieved was 15 cm. One patient (2 months old) died within 24 hour due to failure to cope with excessive blood loss. Two patients were followed up for 3 months and 6 months without complications. Reduction cranioplasty using barrel-stave techniques is an option for children with extreme large head that poses a mechanical or cosmetic problem. Risk and pitfalls should be considered and taken care meticulously, especially the age and blood loss.

Cranial Vault Remodeling in Children With Ventricular Shunts

INTRODUCTION

Cranial vault surgery in children with ventricular shunts is more complex due to the possible interference of shunt location with surgical planning and increased risk of shunt related complications. The study evaluated the management of ventricular shunts during cranial vault remodeling (CVR) and subsequent outcomes and complications following CVR.

METHODS

An IRB-approved retrospective chart review was performed including patients who underwent CVR in presence of a ventricular shunt. Measured outcomes were number of shunt revisions following CVR, 30-day complication rate, 3-month complication rate, and post-CVR Whitaker classification. Finally, a review of the literature was performed, and our results were compared to previous reports.

RESULTS

Eleven patients met the inclusion criteria. Ventricular shunt was not exposed in 18%; exposed and not revised in 54%; exposed and left on a bone peninsula in 18% and simultaneously exposed and revised in 18%. Two patients experienced complications within 30-days. Three additional patients experienced complications within 3-months. An average of 2.2 shunt revisions per patient were performed following CVR. Whitaker classification was I in 7 patients, II in 1 patient and III in 2 patients. Shunt revision rate for patients undergoing CVR for hydrocephalic macrocephaly was on average of 1.2 and 1.9 for shunt-induced craniosynostosis in literature.

CONCLUSIONS

Cranial vault abnormalities in the presence of a ventricular shunt can be effectively treated with CVR. The presence of a shunt does not seem to interfere with final head shape. While leaving the shunt unexposed may appear less morbid, shunt related complications can still occur with this approach.

Reverse Distraction for Treatment of Hydrocephalic Macrocephaly in Late Childhood

Macrocephaly diminishes quality of life for children whose head size inhibits independent mobility and appropriate interaction with caregivers. Cranial reduction is a method of addressing these issues, historically with a high morbidity due most commonly to bleeding and shunt complications. The authors present a 9-year-old girl with holoprosencephaly and severe macrocephaly from progressive hydrocephalus who underwent cranial reduction via reverse distraction osteogenesis, a method to slowly reduce the skull volume. The patient underwent circumferential occipital temporoparietal frontal craniotomy with placement of 4 cranial distractors, followed approximately 1 month later by removal of the distractors and cranioplasty with resorbable fixation devices. The patient demonstrated significant postoperative improvement in head control and interaction in school activities. This is the oldest patient with macrocephaly treated with reverse distraction in the literature to date. The slow contraction of the cranial vault with limited bony surgery at the time of initial reduction provides an additional safety margin, and should be considered in older children presenting with profound macrocephaly.

Early postnatal cranial vault reduction and fixation surgery for severe hydrocephalic macrocephaly

OBJECTIVE Infants with severe hydrocephalus and extreme macrocephaly typically undergo CSF diversion early in life, which can result in significant cranial deformity due to CSF overdrainage. In this scenario, overlap of the cranial plates can precede the development of secondary synostosis and/or severe, permanent cranial deformity. As a result, extensive cranial vault remodeling is sometimes undertaken later in life, which is often challenging and has been associated with mortality and a high morbidity rate. The authors have previously described a technique for early postnatal cranial vault reduction and fixation (CVRF), in which the calvarial bones are stabilized using absorbable fixation plates in the neonatal period, in an attempt to facilitate patient positioning, simplify hydrocephalus management, and improve cosmesis. Here, the authors describe their institutional experience managing patients with extreme neonatal hydrocephalus with CSF diversion, with and without CVRF, over the past 12 years. METHODS The authors retrospectively reviewed the charts of infants with extreme hydrocephalus (head circumference > 49 cm) treated at their children's hospital with ventriculoperitoneal shunting, with or without CVRF, between 2005 and 2017. Data collected included age, sex, etiology of hydrocephalus, type of CVRF performed (anterior, posterior, or combined), follow-up duration, orbitofrontal circumference, craniometric measurements, intraoperative blood loss, operative duration, and postoperative complications. Developmental data were collected using the third edition of the Ages and Stages Questionnaire. Photographic imaging was used to demonstrate esthetic outcomes, and family questionnaires were used to evaluate satisfaction with the esthetic outcome. RESULTS Eleven patients with extreme neonatal hydrocephalus underwent CSF shunting; 5 underwent shunting alone and 6 patients underwent shunting and CVRF. For patients who underwent shunting and CVRF, the median age at CVRF was 6 days and the median interval between shunt placement and CVRF was 2.5 days. The mean extent of calvarial vault volume reduction was 44.5% (± 3.9%). The mean duration of the CVRF procedure was 108 minutes, and 5 of 6 patients required intraoperative transfusion. Of the 5 patients who underwent shunting alone, 3 developed severe cranial deformities. Of 6 patients who underwent shunting and CVRF, 1 had a poor cosmetic outcome. In the shunting-alone group, 2 patients died and 1 required extensive cranial vault correction at 10 years of age. One patient in the shunting and CVRF group also died. CONCLUSIONS CVRF in combination with CSF shunting in the neonatal period can simplify the treatment of the rare case of severe hydrocephalic macrocephaly and leads to cosmetic outcomes that are considered good by their families.

Reduction cranioplasty for macrocephaly caused by giant occipital cystic lesion

Reduction cranioplasty for macrocephaly improves patients' quality of life both functionally and aesthetically. However, it is indicated for only a small number of patients because of the risks of complications. Thus, it is rarely performed, and not many reports have been published. In Dandy-Walker syndrome, there is often a posterior fossa cyst continuous with the fourth ventricle. We report here a case of scaphocephalic macrocephaly because of such a cystic lesion. The patient underwent a single-stage surgery with plication of the cyst wall and posterior reduction cranioplasty. This procedure achieved good results.

Reduction cranioplasty with the aid of simulated computer imaging for the treatment of hydrocephalic macrocephaly

OBJECT

The occurrence of hydrocephalic macrocephaly is uncommon. When the condition does occur, it is usually seen in infants and young children. Patients with this disorder have an excessively enlarged head and weak physical conditions. Various surgical techniques of reduction cranioplasty for the treatment of these patients have been reported. In this study, a revised surgical procedure with the aid of simulated computer imaging for the treatment of hydrocephalic macrocephaly is presented.

METHODS

Five cases of hydrocephalic macrocephaly in children ranging in age from 16 to 97 months were reviewed. These patients underwent surgical treatment at The First Affiliated Hospital of Xiamen University over a period of 4 years from January 2007 to January 2011. After physical examination, a 3D computer imaging system to simulate the patient's postoperative head appearance and bone reconstruction was established. Afterward, for each case an appropriate surgical plan was designed to select the best remodeling method and cranial shape. Then, prior to performing reduction remodeling surgery in the patient according to the computer-simulated procedures, the surgeon practiced the bone reconstruction technique on a plaster head model made in proportion to the patient's head. In addition, a sagittal bandeau was used to achieve stability and bilateral symmetry of the remodeled cranial vault. Each patient underwent follow-up for 6-32 months.

RESULTS

Medium-pressure ventriculoperitoneal shunt surgery or shunt revision procedures were performed in each patient for treating hydrocephalus, and all patients underwent total cranial vault remodeling to reduce the cranial cavity space. Three of the 5 patients underwent a single-stage surgery, while the other 2 patients underwent total cranial vault remodeling in the first stage and the ventriculoperitoneal shunt operation 2 weeks later because of unrecovered hydrocephalus. All patients had good outcome with regard to hydrocephalus and macrocephaly.

CONCLUSIONS

There are still no standard surgical strategies for the treatment of hydrocephalic macrocephaly. Based on their experience, the authors suggest using a computer imaging system to simulate a patient's postoperative head appearance and bone reconstruction together with total cranial vault remodeling with shunt surgery in a single-stage or 2-stage procedure for the successful treatment of hydrocephalic macrocephaly.

Cranial reduction and fixation with a resorbable plate combined with cerebrospinal fluid shunting for difficult-to-manage macrocephaly related to hydrocephalus

The management of newborns with extreme macrocephaly related to hydrocephalus can be difficult; balancing the treatment of severe cranial deformity with optimal hydrocephalus management can be complicated. Excessive CSF drainage can result in significant suture overlap that leads to difficulties in patient positioning, secondary synostosis, and long-term aesthetic complications. Delayed cranial reduction and remodeling procedures carry significant risk, and the aesthetic outcomes have sometimes been poor. The authors describe a newborn with severe macrocephaly who underwent shunt placement followed by a limited cranial reduction and fixation procedure using an absorbable plate within the 1st week of life. The procedure produced an immediate intracranial volume reduction of 49%. This novel management strategy facilitated patient positioning, simplified hydrocephalus management, and provided an excellent aesthetic outcome.

Correction of hydrocephalic macrocephaly with total cranial vault remodeling and molding helmet therapy

BACKGROUND

Hydrocephalic macrocephaly is a rare problem that may result in cranial vault instability, difficulties with posture and movement, and hindrance in neurological development. The authors studied the outcomes of hydrocephalic macrocephalic cases in which patients underwent single-stage total cranial vault remodeling and postoperative helmet therapy.

METHODS

Consecutive patients with hydrocephalic macrocephaly treated at University of California, Los Angeles from 2000 to 2007 were studied (n = 8). Perioperative examinations (head circumference), lateral cranial radiographs (anteroposterior, lateral, and cranial height measurements) and three-dimensional computed tomography scans (cranial volume) were used to access cranial reduction. Developmental testing, physician evaluations (Whitaker score), and parental surveys were used.

RESULTS

Improvements in mean head circumference (from 58.8 cm to 48.9 cm, or 17 percent reduction), and cranial volume measurements (from 1924 cc to 1212 cc, or 35 percent reduction) were seen in patients after the procedure. In addition, developmental testing scores improved in half, or four of eight patients. Whitaker score was 1.9 with only one case requiring revision but five needing subsequent shunts. Surveys showed a high satisfaction rate with final appearance and ease of childcare.

CONCLUSION

For the rare patient with hydrocephalic macrocephaly, treatment with total cranial vault remodeling with postoperative helmet therapy may be successful, but follow-up monitoring and subsequent ventriculoperitoneal shunting may be necessary.

Vault reduction cranioplasty for extreme hydrocephalic macrocephaly

Due to early diagnosis and treatment of hydrocephalus, neurosurgeons rarely are called upon to treat patients with extreme hydrocephalic macrocephaly. Macrocephaly can limit mobility and hygiene. The critical evaluation and surgical correction of the morphological problem of macrocephaly secondary to hydrocephalus is complex. Various techniques such as quadrantal, picket fence, crossbar, and modified rr techniques have been used to reduce the size of the cranial vault to decrease cranial volume while achieving good cosmesis. Limitations of vault reduction cranioplasty include the inability to alter the anteroposterior and lateral diameters of the skull base, the inability to shorten the superior sagittal sinus, and the need to avoid infolding of the brain due to the risk of venous infarcts. Reduction cranioplasty is indicated in the occasional patient whose large head size represents a mechanical or cosmetic problem of sufficient magnitude to seriously interfere with motor development and functioning, with resultant development of pressure sores and difficulties with nursing care. Reduction cranioplasty should be avoided in patients under the age of 3 years.

Cranial vault reduction cranioplasty in children with hydrocephalic macrocephaly

Craniofacial surgeons are rarely presented patients with extreme hydrocephalic macrocephaly due to early diagnosis and treatment of the hydrocephalus. Macrocephaly can significantly limit or prohibit mobility, hygiene and can drastically change lifestyle and developmental issues. The authors herein report on four consecutive total cranial vault reduction cranioplasty procedures for correction of hydrocephalic macrocephaly. The patients had a reduction in cranial volume ranging from 111-641 mL. All patients survived the procedure. Improvement in head control and aesthetics were improved in all patients. All of the patients required at least one shunt revision following the procedure. We conclude that total cranial vault reshaping is safe and effective for the treatment of macrocephaly secondary to hydrocephalus.

Temporal double inversion method in reshaping the temporal bulging in a case of Apert's syndrome

A case is reported of Apert's syndrome with severe bilateral balloonings of the temporal region in addition to other typical craniofacial deformities. He had had three previous strip craniectomies. His mentality and intelligence were normal. In order to improve his deformities, the following steps were carried out: 1. 1.5 cm frontal advancement with reshaping the horizontal arc of the supraorbital ridge by out-fracturing. 2. Bilateral temporal double turnover method with internal decompression of the temporal lobe by resection of the sphenoid wing abnormally roofing the temporal lobe. 3. Reduction of the height of the cranial vault. The result was gratifying.