A preliminary rcport is submitted on the aspiration biopsy of the prostatic gland.A technique of prostatic biopsy is described, being relatively free of complications and readily accepted by patients as an office procedure for routine screening for carcinoma of the prostate.A modification of the Giemsa staining technique is performed so as to evidence pathognomic elements within the interior of the nucleus, specifically in the altered nucleolus.Endoscopy 1 (1969) 27-32