Clival Extent Classification for Surgical Risk

We classified tumor extension in 4 distinct subgroups: clival extension (CE) 1–4 depending on the preoperative CT and MR imaging. The classification was evaluated by 2 individual reviewers (Fig. 1):

CE1: Intraosseous lesion

CE2: Destruction of the osseous clival cortical bone

CE3: Brainstem reached without compression or infiltration

CE4: Compression/infiltration of the brainstem

Figure 1

Clival extent classification (CE) with various extent categories: CE1: Intraosseous lesion, CE2: Destruction of the osseous clival cortical bone, CE3: Brainstem reached without compression or infiltration, CE4: Compression/infiltration of the brainstem.

The aim of this simple classification was to assess and quantify the risk and occurrence of complications based on imaging without histopathological diagnosis before the operation.

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Butenschoen V.M., Krauss P., Bernhardt D., Negwer C., Combs S., Meyer B, & Gempt J. (2023). The transnasal endoscopic approach for resection of clival tumors: a single-center experience. Scientific Reports, 13, 3012.

Publication 2023

Brainstem Clival Cortical Osseous Osseous bone Tumor

Corresponding Organization : Technical University of Munich

Other organizations : University of Augsburg, Helmholtz Zentrum München, German Marine Research Consortium

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Variable analysis

independent variables

Clival extension (CE) classification: CE1, CE2, CE3, CE4

dependent variables

Risk and occurrence of complications based on imaging without histopathological diagnosis before the operation

control variables

No control variables explicitly mentioned

controls

No positive or negative controls explicitly mentioned

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