Cerebrospinal Fluid Congestion in the Perioptic Space
Recent attention has been paid to the cerebrospinal fluid (CSF) dynamics between the intracranial subarachnoid space (SAS) and the SAS around the optic nerve (ON-SAS). We experienced three patients who had an expanded ON-SAS associated with mass lesions
- PDF / 386,664 Bytes
- 4 Pages / 595.28 x 790.87 pts Page_size
- 111 Downloads / 234 Views
Abstract Recent attention has been paid to the cerebrospinal fluid (CSF) dynamics between the intracranial subarachnoid space (SAS) and the SAS around the optic nerve (ON-SAS). We experienced three patients who had an expanded ON-SAS associated with mass lesions extending into the optic canal, and studied their MRI findings after decompressive surgery. In all three patients, decompressive surgery of the optic canal resulted not only in the disappearance of the expanded ON-SAS, but also in improvement of the visual function. The present study may indicate that normalization of the ON-SAS can be considered to be the achievement of “effective” decompression. Therefore, we suggest that, in patients with an expanded ON-SAS associated with mass lesions, the state of the ON-SAS should be evaluated by pre- and postoperative MRI, in addition to the degree of tumor resection. Keywords Cerebrospinal fluid • Magnetic resonance imaging • Optic nerve • Subarachnoid space
been reported to be caused by various neoplastic and nonneoplastic conditions [1, 2, 4, 5, 11–13]. MRI is a useful tool for objectively evaluating the ON-SAS [12]. We experienced three patients with an expanded ON-SAS associated with mass lesions that extended into the optic canal, and studied their MRI findings after decompressive surgery. We herein report these cases and discuss the CSF dynamics of the ON-SAS.
Materials and Methods We experienced three patients who met the inclusion criteria as follows: (1) Preoperative MRI demonstrated an expanded ON-SAS associated with mass lesions extending into the optic canal. (2) ON decompression had been performed. (3) Postoperative MRI was performed to observe the ON-SAS. We investigated the pre-and postoperative MRI findings and visual functions of these patients.
Introduction The cerebrospinal fluid (CSF) circulation has been studied for a long time; however, its dynamics have not yet been explored [14]. Among several related topics, recent attention has been paid to the cerebrospinal fluid (CSF) dynamics between the intracranial and the subarachnoid space (SAS) of the optic nerve (ON) (ON-SAS) [3, 5–10]. The expansion of the ON-SAS, which is known as an optic nerve meningocele, optic hydrops, or perioptic hygroma, has
S. Takeuchi (*), H. Nawashiro, K. Wada, H. Osada, N. Otani, K. Nagatani, H. Kobayashi, T. Suzuki, and K. Shima Department of Neurosurgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan e-mail: [email protected]
Results Case 1 A 53-year-old man was admitted with vision loss in the left eye. Magnetic resonance imaging (MRI) showed a tumor of the tuberculum sellae, which extended into the left optic canal (Fig. 1a). MRI also demonstrated an expanded SAS of the left ON (Fig. 1b, c). Tumor resection with optic canal decompression was performed. A histological examination revealed meningothelial meningioma. After surgery, the patient’s visual acuity showed improvement. MRI obtained 7 days after surgery demonstrated complete tumor resection and a subtotal disap
Data Loading...
