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El Khashab et al. Journal of Medical Case Reports 2010, 4:104 http://www.jmedicalcasereports.com/content/4/1/104 JOURNAL OF MEDICAL CASE REPORTS Open Access CASE REPORT Acquired craniomeningocele in an infant with craniosynostosis: a case report Case report Mostafa El Khashab2, Farideh Nejat*1, Shahrooz Yazdani1 and Nima Baradaran1 Abstract Introduction: Craniosynostosis can affect the skull in various ways. The most common forms are abnormal skull shape and beaten copper pattern, while Lückenschädel (or lacunar skull) is one of the least common forms. Case presentation: We report the case of a 3-month-old Caucasian boy with multiple suture craniosynostosis and with acquired craniomeningocele presenting as a bulging mass in the lateral occipital area. Conclusion: To the best of our knowledge, this is the first report of a patient with multiple suture craniosynostosis and acquired craniomeningocele. Introduction The incidence of non-syndromic craniosynostosis is approximately 0.4 to 1 in 10,000 live births. A single suture is most commonly implicated. Syndromic craniosynostosis, with a more generalized pattern, is much less common [1]. The majority of patients with craniosynostosis have various skull alterations, which are severe in syndromic type and are mainly considered to have arisen from compensatory growth of the skull after stenosis of some sutures and high intracranial pressure. Skull deformities and beaten copper pattern are common findings in craniosynostosis. Lückenschädel (lacunar skull) is rarely observed, occuring in approximately 10% of patients with craniosynostosis [2,3]. To the best of our knowledge, cranial meningocele has not been reported with craniosynostosis before. We describe a patient with craniosynostosis with acquired craniomeningocele and hypothesize probable causes for this abnormal presentation. Case presentation A 3-month-old Caucasian boy was referred to our hospital due to abnormal shape of his head and a bulging mass in the left occipital area. The mass had been found one month before referral with a gradual increase in size, and fluctuation in size during crying and sleeping. The lesion * Correspondence: Nejat@sina.tums.ac.ir 1 Department of Neurosurgery, Children's Hospital Medical Center, Medical Sciences, University of Tehran, Tehran, Iran Full list of author information is available at the end of the article was 1.5 × 2 cm in maximum diameter (Figure 1), very tense, non-tender, and pulsatile. His head circumference was on the 25th percentile for his age class. There was apparent hypertelorism with exophthalmia and ageappropriate developmental milestones. Askull X-ray (Figure 2) and a brain computed tomography (CT) scan showed fusion of coronal, lambdoid and basal sutures with a diffuse beaten copper appearance (Figure 3). Hydrocephalus was not found in the CT scan. Expansive craniotomy associated with skull reconstruction was performed. There were prominent convolutional markings in the skull exposed in the operation field, complicated by dura matter entrapment in some places. The bone was very thin especially in posterior regions in conjunction with small defects in some areas. Postoperative course was uneventful and the child's occipital mass resolved dramatically. Discussion Skull shape irregularity has been recognized since antiquity, but the scientific study of abnormal skull growth related to craniosynostosis originates back to the late 1700s. Experimental studies have shown that selective restriction of an individual cranial vault suture's growth could result in skull deformities [4]. Moreover, cranial base and even facial deformities develop secondary to the cranial vault suture restrictions [5]. Beaten copper pattern is another skull change observed in craniosynostosis. It was initially assumed to have resulted from chronically elevated intracranial pressure © 2010 El Khashab et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Com- BioMed Central mons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. El Khashab et al. Journal of Medical Case Reports 2010, 4:104 http://www.jmedicalcasereports.com/content/4/1/104 Page 2 of 3 Figure 3 Tri-dimensional computed tomography scan confirmed the fusion in the coronal and lambdoid sutures and diffuse skull changes with honeycomb configuration and beaten copper appearance. Figure 1 Occipital lump: a unilateral mass in the left occipital area with pulsation but without tenderness. (ICP) [6], but later it was widely considered to be a reflection of normal brain growth, without pathological significance [7]. Diffuse, severe beaten copper pattern is an indicator of elevated ICP, which is more common in patients with craniosynostosis than in unaffected children. The beaten copper pattern originates from the pressure that the brain exerts on the continuously remodeling inner cranium resulting in bony convolutions that are manifested as a beaten copper appearance on cranial radiographs [8]. Lückenschädel is characterized by multiple, round or oval, radiolucent defects, sharply separated by dense strips of bone (honeycomb-like configuration), which tend to cluster in the cranial vault on plain skull film. It can be a consequence of elevated ICP or can be a self-limited phenomenon seen in children with myelomeningocele [9]. A comprehensive Medline search of articles from 1966 to 2008 revealed no previous cases of acquired craniocele in craniosynostosis. The development of craniocele in the setting of multiple suture synostosis is not clearly understood and some suggestions may be considered. Severe synostosis and reduced cranial growth in this patient caused brain volume to exceed the cranium size, resulting in severely elevated ICP. High ICP was observed in a brain CT scan as multiple sites of bone defects, diffuse beaten copper appearance and Lückenschädel. Meanwhile in the occipital area, where the cranium and brain are closely associated, high ICP produced a gross bone defect and dura with brain herniated through this defect to attenuate the pressure. Conclusion The presence of brain herniation in a patient with multiple suture synostosis is not clearly understood and has not been reported before. Our patient presented with occipital craniocele and we have tried to explain the probable mechanisms causing this lesion. Severe synostosis coupled with reduced cranial growth caused severe intracranial hypertension. Meanwhile in the occipital area, where the cranium and brain are closely associated, high ICP can result in a bone defect and dura associated with brain herniated through this defect. Figure 2 Skull X-ray shows fusion of both coronal and lambdoid sutures with diffuse beaten copper appearance. El Khashab et al. Journal of Medical Case Reports 2010, 4:104 http://www.jmedicalcasereports.com/content/4/1/104 Consent Written informed consent was obtained from the patient's parents for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal. Abbreviations CT: computed tomography; ICP: intracranial pressure. Competing interests The authors declare that they have no competing interests. Authors' contributions FN, NB, and SY all made major contributions in patient care, literature review and drafting of the manuscript. MEK made a substantial contribution to the literature review, correction and final approval of the manuscript. All authors read and approved the final manuscript. Author Details 1Department of Neurosurgery, Children's Hospital Medical Center, Medical Sciences, University of Tehran, Tehran, Iran and 2Department of Neurosurgery, Hackensack University Medical Center, New Jersey, USA Received: 3 July 2008 Accepted: 11 April 2010 Published: 11 April 2010 © This Journal 2010 is article an El ofOpen Khashab Medical is available Access Case et al;from: article Reports licensee http://www.jmedicalcasereports.com/content/4/1/104 distributed 2010, BioMed 4:104 under Centralthe Ltd. terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. References 1. Shin JH, Persing JA: Craniofacial syndromes. In Youmans Neurological Surgery 5th edition. Philadelphia: Saunders; 2004:3315-3330. 2. Shopfner CE, Jabbour JT, Vallion RM: Craniolacunia. Am J Roentgenol Radium Ther Nucl Med 1965, 93:343-349. 3. Wilson WG, Alford BA, Schnatterly PT: Craniolacunia as the result of compression and decompression of the fetal skull. Am J Med Genet 1987, 27:729-730. 4. Persing JA, Morgan EP, Cronin AJ, Wolcott WP: Skull base expansion: craniofacial effects. Plast Reconstr Surg 1991, 87:1028-1033. 5. Persson KM, Roy WA, Persing JA, Rodeheaver GT, Winn HR: Craniofacial growth following experimental craniosynostosis and craniectomy in rabbits. J Neurosurg 1979, 50:187-197. 6. Schreiber F: Intracranial pressure: The correlation of choked disc and roentgenologic pressure signs. Am J Roentgenol 1930, 33:607-611. 7. Macaulay D: Digital markings in radiographs of the skull in children. Br J Radiol 1951, 24:647-652. 8. Du Boulay G: The radiological evidence of raised intracranial pressure in children. Br J Radiol 1957, 30:375-377. 9. Tajima M, Yamada H, Kageyama N: Craniolacunia in newborn with myelomeningocele. Childs Brain 1977, 3:297-303. doi: 10.1186/1752-1947-4-104 Cite this article as: El Khashab et al., Acquired craniomeningocele in an infant with craniosynostosis: a case report Journal of Medical Case Reports 2010, 4:104 Page 3 of 3