Diagnostic compound B-mode ultrasound scans done on gynecologic patients during the past three years were reviewed and compared with surgical findings or clinical follow-up. The 190 scans were analyzed and categorized as diagnostic, compatible (or confirmatory), equivocal, misleading, or negative. Although only 6.4% were diagnostic, the majority (66.3%) were compatible with the clinical and pathologic findings. Criteria for interpreting B-mode scans are discussed.