Chronic spontaneous diploic hematoma

Case report

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  • 1 Servicio Regional de Neurocirugía,
  • 2 Servicio de Neurología,
  • 3 Sección de Neuroradiología Intervencionista, and
  • 4 Servicio de Anatomía Patológica, Hospital Universitario Virgen de la Arrixaca, Murcia, Spain
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The authors report the case of a 23-year-old woman with café-au-lait spots and axillary and inguinal freckling who presented with a diploic chronic spontaneous hematoma of the left parietal bone. To the authors' knowledge, this case represents the first description of a diploic hematoma in a patient with stigmata of neurofibromatosis Type 1 unrelated to head trauma. Plain skull radiography showed an osteolytic lesion with well-circumscribed margins, corresponding to the hematoma, together with exuberant perilesional vascular markings. Angiography demonstrated an incidental aneurysm of the left supraclinoidal internal carotid artery and an unusual cortical venous drainage toward the diploic vessels. The blood flow of these vessels on the right hemicranium was sluggish and exhibited enlarged diploic venous lacunas. The authors hypothesize that the hematoma was formed by both an abnormal venous drainage toward the diploic vascular net, together with a vasculopathy that caused stenosis and obstruction of the normal drainage pathways from these vessels.

Abbreviations used in this paper: AVF = arteriovenous fistula; NF = neurofibromatosis; NF1 = NF Type 1; NIH = National Institutes of Health.

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Contributor Notes

Address correspondence to: José González-Tortosa, M.D., Servicio Regional de Neurocirugía, Hospital Universitario Virgen de la Arrixaca, 30120 El Palmar, Murcia, Spain. email: tortosa@ctv.es.

Please include this information when citing this paper: published online January 28, 2011; DOI: 10.3171/2010.12.JNS101589.

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