 the seeding of tumor through cerebrospinal fluid ( csf ) from primary intracranial tumors is very rare , often goes undetected , and is usually identified only on autopsy . 
 csf cytology along with magnetic resonance imaging constitutes the standard approach of diagnosing this grave condition . 
 use of fluoro-2-deoxyglucose positron emission tomography / computed tomography ( pet / ct ) in indentifying spinal metastases from primary intracranial malignancies is very limited and has been reported in patients with metastatic glioblastoma multiforme and medulloblastomas . 
 we present a rare case of metastatic anaplastic ependymoma to show the potentially clinically utility of pet / ct in diagnosing leptomeningeal or the so - called  drop  metastases . 
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