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  • Title: Spinal drop metastasis from grade I skull base chondrosarcoma.
    Author: Hall ND, Fabinyi G, Gul SM, Cher L, Leibsch NJ.
    Journal: J Clin Neurosci; 2010 Jan; 17(1):135-7. PubMed ID: 19864142.
    Abstract:
    Chondrosarcoma of the skull base is a rare tumour with a good prognosis following surgical resection. We describe a patient with low-grade chondrosarcoma of the skull base with intradural extramedullary spinal metastases. A 31-year-old female with grade 1 chondrosarcoma involving the cavernous sinus, sphenoid wing and clivus presented at age 19. The tumour was subtotally excised at initial surgery and over the following 4 years, 3 subsequent resections were undertaken for tumour progression followed by proton beam radiotherapy to the residual tumour. The patient re-presented with cervical radiculopathy 7 years later. MRI showed multiple, intradural extramedullary spinal drop metastases. Following surgical excision of the symptomatic lesion, histological diagnosis was confirmed as a mixed hyaline/myxoid grade 1 chondrosarcoma. Patients with skull base chondrosarcoma with intradural extension should have whole spine imaging as part of long-term monitoring to exclude drop metastases, particularly after intradural surgery.
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