Three cases of granulocytic sarcoma (GS) presented with spina1 cord compression are reported. Two of them were able to be identified by cytologica1 examination of cerebrospinal fluid (CSF), either with Wright-Giemsa stain alone or with the aid of cytochemistry studies, i.e. nonspecific esterase (NSE), chloroacetate esterase (CAE). They were successfully treated with radiotherapy with neurological functions satisfactorily preserved. The other patient was not diagnosed until tumor specimen was obtained at the time of surgica1 decompression. Neurological sequelae such as loss of anal sphincter tone, loss of muscle power and sensory functions of lower extremities greatly influenced the subsequent quality of life. The three cases illustrated the important role of cytological examination of CSF for an early recognition of GS with spina1 cord compression-a rare but troublesome disorder.