open access

Vol 51, No 3 (2017)
Case reports
Submitted: 2015-12-13
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Cisterna magna meningiomas without dural attachment: Report of two cases

Masaaki Kohta, Takashi Sasayama, Tomoaki Nakai, Masaaki Taniguchi, Hiroaki Nagashima, Kazuhiro Tanaka, Katsu Mizukawa, Tomoo Itoh, Eiji Kohmura
DOI: 10.1016/j.pjnns.2017.02.003
·
Neurol Neurochir Pol 2017;51(3):247-251.

open access

Vol 51, No 3 (2017)
Case reports
Submitted: 2015-12-13

Abstract

Meningiomas within the cisterna magna without dural attachment are extremely rare. To the best of our knowledge, only three cases of meningiomas within the cisterna magna have been reported in the literature. The authors present two cases of patient with the cisterna magna meningioma without dural attachment. (Case 1) A 36-year-old female presented with a 10-month history of numbness in the left hand. Magnetic resonance imaging (MRI) disclosed the presence of a contrast-enhanced tumor in the posterior fossa. A suboccipital craniectomy was performed, and the tumor located within the cisterna magna with no attachment to the dura. Diagnosis is made as clear cell meningioma. The postoperative course was uneventful, and a recurrence has not been observed for three years. (Case 2) A 58-year-old man presented with a well-circumscribed mass in the posterior fossa. At surgery, the tumor located within the cisterna magna with a connection to the right tenia. The tumor was totally removed without neurological deficits. At a 7-year follow-up, no evidence of a recurrence was observed. It is quite difficult to preoperatively diagnose as a cisterna magna meningioma without dural attachment. However, complete removal of the tumor should be achieved.

Abstract

Meningiomas within the cisterna magna without dural attachment are extremely rare. To the best of our knowledge, only three cases of meningiomas within the cisterna magna have been reported in the literature. The authors present two cases of patient with the cisterna magna meningioma without dural attachment. (Case 1) A 36-year-old female presented with a 10-month history of numbness in the left hand. Magnetic resonance imaging (MRI) disclosed the presence of a contrast-enhanced tumor in the posterior fossa. A suboccipital craniectomy was performed, and the tumor located within the cisterna magna with no attachment to the dura. Diagnosis is made as clear cell meningioma. The postoperative course was uneventful, and a recurrence has not been observed for three years. (Case 2) A 58-year-old man presented with a well-circumscribed mass in the posterior fossa. At surgery, the tumor located within the cisterna magna with a connection to the right tenia. The tumor was totally removed without neurological deficits. At a 7-year follow-up, no evidence of a recurrence was observed. It is quite difficult to preoperatively diagnose as a cisterna magna meningioma without dural attachment. However, complete removal of the tumor should be achieved.

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Keywords

Meningioma, Cisterna magna, Dural attachment

About this article
Title

Cisterna magna meningiomas without dural attachment: Report of two cases

Journal

Neurologia i Neurochirurgia Polska

Issue

Vol 51, No 3 (2017)

Pages

247-251

DOI

10.1016/j.pjnns.2017.02.003

Bibliographic record

Neurol Neurochir Pol 2017;51(3):247-251.

Keywords

Meningioma
Cisterna magna
Dural attachment

Authors

Masaaki Kohta
Takashi Sasayama
Tomoaki Nakai
Masaaki Taniguchi
Hiroaki Nagashima
Kazuhiro Tanaka
Katsu Mizukawa
Tomoo Itoh
Eiji Kohmura

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