title: Needle aspiration and core biopsy of prostate cancer: comparative evaluation with biplanar transrectal US guidance.
abstract: Biplanar, transrectal ultrasound (US) guidance of needles was used in the transperineal biopsy of possibly malignant prostatic lesions in 80 patients (83 biopsies). A 22-gauge cytologic needle was used to locate and fixate the lesion, and aspiration specimens for cytologic and histologic evaluation were obtained (with 22- and 14-gauge needles, respectively). Twenty-one 19-gauge needle core biopsies were also performed. Forty-nine patients (61%) had histologically prove adenocarcinoma. The rate of cancer diagnosis was 53% with cytologic evaluation and 54% with histologic evaluation (combined yield, 61%). This included 34% of cancers less than 1.0 cm in diameter and 56% of those 1.0-1.5 cm. Thirteen of 23 (57%) of these lesions were nonpalpable or equivocal on digital rectal examination. These results suggest that transrectal US guidance of thin-needle biopsies is useful in diagnosing early prostate cancer.
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis* / Q000473:pathology; D001707:Biopsy, Needle / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D008297:Male; D009367:Neoplasm Staging / Q000379:methods; D010808:Physical Examination; D011471:Prostatic Neoplasms / Q000175:diagnosis* / Q000473:pathology; D012007:Rectum; D014463:Ultrasonography / Q000379:methods*