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GIANT NEUROFIBROMA OF THE OCCIPITAL SCALP ASSOCIATED WITH LAMBDA DEFECT : CASE REPORT Satoshi Nakasu 1 , Yoko Nakasu 1 , Isao Matsuda 1 , Jyoji Handa 1 1Department of Neurosurgery, Shiga University of Medical Science pp.181-185
Published Date 1981/2/1
DOI https://doi.org/10.11477/mf.1406204718
  • Abstract
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Calvarial bone defect associated with a huge neurofibroma in the region of the lambdoid suture was reported in a 42-year-old man with v. Reckling-hausen's neurofibromatosis. An enlarging occipitaltumor was first noted at age 4~5, and an operation was performed at age 12. Lambda defect was noted at that time, but the operative diagnosis was, ap-parently, "meningocele".

Available literature was reviewed, and the sig-nificance of calvarial bone defect in the region of the lambdoid suture as a manifestation of v. Reck-linghausen's disease was stressed.

Lambda defect witn no sclerosing margin, part-icularly if associated with hypoplasia of the ipsil-ateral mastoid cells, has been known to represent the primary nature of the bone defect due to meso-dermal dysplasia. In the present case, plain radio-graphs of the skull revealed abnormal sclerotic change around the bone defect. It is suggested that such an osteoblastic change may well indicate the secondary nature of the bone defect due to the presence of overlying neurogenic tumor.


Copyright © 1981, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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