The results of 67-gallium scanning in 644 patients with histological confirmation of diagnosis are presented. 67-Ga uptake was recorded in 93.3% of 312 malignant and in 85.8% of 332 benign conditions. In 89.4% 67-Ga was successful in distinguishing between malignant and benign disorders. In 58 of 62 lesions due to malignant lymphoma 67-Ga uptake was seen. 67-Ga scanning is an indispensable tool for early diagnosis of hepatoma (n = 80) and an important non-invasive staging procedure for lymphoma patients which complements exploratory laparotomy.