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Updated: May 30, 2026
Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
Published on: July 5, 2021
Computed tomographic findings of skull base bony changes after radiotherapy for nasopharyngeal carcinoma:
Chuan-Miao Xie1, Xue-Wen Liu, Hui Li
1State Key Laboratory of Oncology in South China and Department of Medical Imaging and Interventional Radiology, Cancer Center, SunYat-Sen University, Guangzhou, Guangdong, PR China.
Objective:
To evaluate bony changes in the skull base after radiotherapy by computed tomography (CT) and their correlation with local recurrence in patients with nasopharyngeal carcinoma (NPC) without previous involvement of the skull base.
Design:
Retrospective study.
Setting:
Sun-Yat Sen University Cancer Center.
Methods:
The records of 80 patients with NPC during the period from January 1992 to December 2005 were reviewed. All patients had been treated with radical radiotherapy or chemoradiotherapy at standard doses and were followed up with plain and contrast-enhanced CT every 6 months for 45.5 (range 12-108) months.
Main Outcome Measures:
The types, areas, time of the first occurrence after radiotherapy and development of the postradiation bony changes of the skull base, and local recurrence rates of NPC were measured.
Results:
Eighteen patients (22.5%) had sclerosis in some area of the skull base, and the sclerosis in 5 (27.8%) of these patients changed into osteoporosis in 1 to 5 years after its appearance. Seventeen patients (21.3%) had osteolysis. The local recurrence rate of patients with osteolysis was observed to be significantly higher than that of patients with sclerosis (p < .0001).
Conclusions:
The appearance of osteolytic changes in the skull base during follow-up of patients with NPC who had normal skull base morphology before treatment was associated with tumour recurrence.