[Preoperative hook wire marking of nonpalpable suspected breast lesions]

45 clinical occult breast lesions in 43 patients were preoperatively localised using a mammographic unit, a hole compression plate, and a hookwire canula. 20 carcinomas were found. The positive predictive value of the mammography was 44%, a good result. Serious complications were absend and only one lesion was missed. The preoperative method is effective, rapid, and safe for detecting and localising occult breast lesions. The number operative explorations may be reduced by close contact to the radiologic colleagues and more primary stereotactic biopsies.