Endodermal Cyst Ventral to the Lower Brain Stem —Case Report—

Shigeo MATSUNAGA; Kazuhiko FUJITSU; Saburo YAGISHITA; Teruo ICHIKAWA; Yasunori TAKEMOTO; Yukihiro TAKEDA; Kousuke MIYAHARA; Hitoshi NIINO; Takeki SHIINA

doi:10.2176/nmc.46.614

Case Reports

Endodermal Cyst Ventral to the Lower Brain Stem

—Case Report—

Shigeo MATSUNAGA, Kazuhiko FUJITSU, Saburo YAGISHITA, Teruo ICHIKAWA, Yasunori TAKEMOTO, Yukihiro TAKEDA, Kousuke MIYAHARA, Hitoshi NIINO, Takeki SHIINA

Author information

Shigeo MATSUNAGA
Department of Neurosurgery, National Hospital Organization Yokohama Medical Center
Kazuhiko FUJITSU
Department of Neurosurgery, National Hospital Organization Yokohama Medical Center
Saburo YAGISHITA
Department of Pathology, Kanagawa Rehabilitation Institute
Teruo ICHIKAWA
Department of Neurosurgery, National Hospital Organization Yokohama Medical Center
Yasunori TAKEMOTO
Department of Neurosurgery, National Hospital Organization Yokohama Medical Center
Yukihiro TAKEDA
Department of Neurosurgery, National Hospital Organization Yokohama Medical Center
Kousuke MIYAHARA
Department of Neurosurgery, National Hospital Organization Yokohama Medical Center
Hitoshi NIINO
Department of Pathology, National Hospital Organization Yokohama Medical Center
Takeki SHIINA
Department of Radiology, National Hospital Organization Yokohama Medical Center

Keywords: endodermal cyst, brain stem, meningitis

JOURNAL OPEN ACCESS

2006 Volume 46 Issue 12 Pages 614-618

DOI https://doi.org/10.2176/nmc.46.614

Details

Abstract

A 28-year-old woman presented with a rare case of endodermal cyst located ventral to the lower brain stem manifesting as recurrent aseptic meningitis. Computed tomography and magnetic resonance imaging demonstrated a cystic mass located ventral to the lower brain stem and extending from the prepontine to the upper cervical (C-2) cistern. The lesion was totally removed through a retrosigmoid craniotomy and C1-2 hemilaminectomy. Histological and immunohistochemical examination showed the cyst was derived from the endoderm. The histological diagnosis was endodermal cyst. Early diagnosis and surgical removal are important for patients with these cysts.

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