Intraspinal (leptomeningeal or intramedullary) metastases from primary intracranial gliomas have been well documented in several clinical and pathological series.1–5 Post-mortem and cytological incidence of meningeal and cerebrospinal fluid (CSF) dissemination of up to 40 % has been demonstrated in these studies. Symptomatic intraspinal metastases in patients with primary intracerebral gliomas occur rarely however – roughly 1–5 % in published series6–9 – with the reduced incidence of symptomatic metastases primarily attributed to poor survival in this group of patients.
In this case series, we report four cases of symptomatic intraspinal leptomeningeal and intramedullary metastases from an intracranial glioma. Two cases of primary anaplastic astrocytoma, one case of glioblastoma multiforme (GBM) and one unspecified grade 3 glioma are presented. Three cases are of leptomeningeal metastases only, while one case is of simultaneous leptomenigeal and intramedullary metastases. We report the clinical findings, radiographic evaluation, treatment and subsequent clinical course of these patients.
The mean age of the four cases in our series was 43 years (28–55 years). The intraspinal metastases were detected after a median time of 18.5 months after onset of the disease and the median survival time of the four patients from detection of intraspinal metastases was one month. Median overall survival of the four patients was 19 months.
In April 1993, this 28-year-old man presented following a generalised seizure. Computed tomography (CT) head scan demonstrated a large mass in the right temporal lobe with moderate surrounding oedema and compression of the lateral ventricle. Subtotal resection was performed with histopathology demonstrating low-grade astrocytoma and no adjuvant treatment was given. He developed recurrent seizures in 1996 and clinical examination demonstrated bilateral papilloedema; he underwent a further craniotomy and debulking for recurrent high-grade astrocytoma. He proceeded to cranial radiotherapy, 60 Gy in 2 Gy fractions commencing six weeks after surgery given with concurrent procarbazine, lomustine and vincristine (PCV) chemotherapy. Post-radiotherapy CT scan showed residual disease. Chemotherapy was completed in May 1997 and four months later the patient attended his general practitioner (GP) complainingof back pain, progressive leg weakness and numbness in the legs and one week later was admitted to hospital with urinary retention.
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