Figure 1

Primary bone tumours and tumourous lesions of the hand from the Bone Tumour Registry Hamburg from 1976 until 2006. Distribution of all cases per age decade with gender break down (A). Total of 320 tumour lesions were detected in men and 311 in women (B). Malignancies were found in 10.6% of all cases with an average age of 53.6 ± 24.3 years. Benign tumours were usually detected in younger patients (average age 33.8 ± 17.4 years) (C). Tumour lesions were divided into six groups: cartilage, bone cysts, osteogenic, vascular, fibrogenic and other tumours (D). Breakdown of tumour lesions into anatomical sites and malignant cases found in the specific site (E).