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  • Title: Chiari malformation type I with concomitant persistent trigeminal artery -- report of an unusual case and a review of the current literature.
    Author: Oertel M, Kästner S, Winking M, Böker DK, Deinsberger W.
    Journal: Zentralbl Neurochir; 2006 Feb; 67(1):30-5. PubMed ID: 16518749.
    Abstract:
    BACKGROUND: Chiari malformation type I is a stenosis of the subarachnoid space at the level of the foramen magnum due to a small posterior fossa and herniation of the cerebellar tonsils. We present here the unusual case of a Chiari malformation in conjunction with a persistent trigeminal artery and hypoplasia of the basilar artery, also known as a Saltzman anomaly. CASE REPORT: A 34-year-old female physician presented with recurrent headaches, bilateral weakness of deltoid muscles and numbness of the fingertips 3 to 5. A cranial MRI revealed a descent of the cerebellar tonsils to the level of C2 and a supracerebellar cyst. During surgery, a decompressive suboccipital craniectomy was performed. The supracerebellar cyst was fenestrated and the cerebellar tonsils were resected bilaterally. Two days after surgery the patient developed cranial nerve dysfunction and a right-sided hemiparesis. Cerebral angiography revealed a Saltzman type 1 anomaly with persistent primitive trigeminal artery and hypoplasia of the basilar artery. DISCUSSION: This is the first report in the literature about the coincidence of both unusual anomalies. The latest literature of both rare anatomy and the unusual clinical course will be discussed.
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