Fifty six humeral prostheses were inserted from 1974 to 1984 for primary bone tumours of the shoulder. In 40 patients a proximal humeral resection was performed and in the remaining 16 cases a Tikhoff-Linberg procedure was employed. The length of humeral resection ranged from 9 cm to 24 cm. A detailed analysis of the oncological and functional results was made. The resection was well clear in 42 patients (75%), marginal in 12 (21.5%), and through tumour in 2 (3.5%). Eight local recurrences were noted. The functional results were satisfactory, the patients having a wide range of active rotation and being able to do sedentary work. A new modified humeral modular prosthesis was introduced in 1984 and is presented.
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